Postmark website screenshot

Postmark

Postmark is an email delivery service that helps businesses send and track transactional and broadcast email reliably, replacing SMTP with a scalable service that surfaces detailed delivery analytics, bounce tracking, open and click tracking, and dedicated IP addresses.

Postmark publishes 30 API contracts indexed on the APIs.io network, including Activate API, Alias API, Batch API, and 27 more. Tagged areas include Email, Messaging, Transactional Email, Deliverability, and SMTP.

The Postmark catalog on APIs.io includes 1 event-driven AsyncAPI specification and 2 Spectral governance rulesets.

Postmark’s developer surface includes documentation, getting-started guide, pricing, signup flow, engineering blog, support, changelog, and 58 more developer resources.

🌐 Visit website📡 Profile data on GitHub
68.7/100 exemplar ▬ flat Agent 40/100 agent ready Front door AI 2/6 trace saas Full breakdown ↓
scored 2026-10-17 · rubric v0.24.0
AccessFreemium
5 published contracts 1 MCP Servers 6 Agent Skills 16 Features
EmailMessagingTransactional EmailDeliverabilitySMTPEmail APIWebhookInbound EmailEmail TemplatesEmail Analytics

What people ask Postmark 30

The questions people put to an LLM, and the jobs they hand an agent, that Postmark's APIs answer — each one linked to the operation that does it. Generated by API Evangelist

Postmark Stats API Get an overview of outbound email stats “How is my outbound email performing overall this month?” Count emails sent per day “How many emails did I send each day last week?” Count bounces per day by type “How many hard and soft bounces did I get each day?” Count spam complaints per day “How many recipients marked my emails as spam?”
Postmark Messages API Search sent emails “Did my password reset email actually go out to a particular customer?” Get details of a sent email “What happened to one specific email I sent — was it delivered?” Get the raw source of a sent email “How do I see the raw SMTP source of an email I sent?” Search received inbound emails “Which inbound emails failed processing or got blocked this week?”
Postmark Outbound API Count link clicks per day “How many link clicks did my emails get each day?” Break down link clicks by device platform “Do people click my email links more from phones or desktops?” Count email opens per day “How many opens and unique opens did my emails get each day?” Break down opens by device platform “Are my emails opened more on mobile, desktop or webmail?”
Postmark Templates API Copy templates from one server to another “How do I copy my templates from staging to production?” Send one email from a saved template “How do I send a single message based on a template I've stored?” Send many templated emails at once “Can I send a whole list of template-based emails in one request?” List the server's templates “Which email templates exist on this server?”
Postmark Domains API List sending domains “Which domains have I added to my Postmark account?” Add a sending domain “How do I add a new domain so I can send email from it?” Get a domain's DNS and verification status “What DKIM and Return-Path records does one of my domains need?” Change a domain's Return-Path “How do I change the Return-Path on a domain I already added?”
Postmark Sender Signatures API List sender signatures “Which from addresses are registered as sender signatures on my account?” Register a new from address “How do I add a new from address so I can send email as it?” Get a sender signature “Is my sender signature confirmed, and what DNS does it still need?” Update a sender signature “How do I change the display name on an existing sender signature?”
Postmark Bounces API Summarize bounces and inactive addresses “How many of my recipient addresses are currently inactive because of bounces?” List bounced emails “Which emails bounced on my server last week?” Get details of one bounce “What exactly caused a particular bounce I'm looking at?” Get the raw dump of a bounce “Can I see the raw SMTP source of a bounced message?”
Postmark Server Management API Get a server on the account “What are the settings of one of the servers on my account?” Edit a server by ID “How do I rename another server on my account?” Delete a server “How do I permanently remove a server I no longer need?” List servers on the account “Which servers exist on my account?”
Postmark Sending API Send a single email “How do I send one transactional email with Postmark?” Send a batch of emails in one call “Can I send many different emails in a single API request?” Send an email from a template “How do I send an email using one of my saved templates?” Send a batch of templated emails “Can I send lots of personalized template emails in one request?”
Postmark Messages API Search link click events “Which links in my emails are recipients clicking, and from where?” Search email open events “Who opened my emails, and from which email clients?” Get details of a sent email “What happened to one specific email I sent — was it delivered?” Search sent emails “Did my password reset email actually go out to a particular customer?”
Postmark Triggers API List inbound blocking rules “Which senders or domains am I currently blocking from my inbound stream?” Search tag triggers “Which tag triggers are set up on my server?” Delete a tag trigger “How do I remove a tag trigger I no longer need?”
Postmark Inbound Rules API Block an inbound sender or domain “How do I stop inbound mail from a specific sender reaching my webhook?” List inbound blocking rules “Which senders or domains am I currently blocking from my inbound stream?” Remove an inbound blocking rule “How do I unblock a sender I added an inbound rule for?”

Showing 12 of 30 APIs with phrasing — see every API.

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-17 · rubric v0.24.0
Composite quality — 68.7/100 · exemplar
Contract Quality 9.5 / 19
Developer Ergonomics 13.6 / 15
Access Clarity 11.3 / 15
Operational Transparency 8.0 / 10
Contract Governance 2.9 / 9
Discoverability 5.8 / 8
Regulatory Posture 3.8 / 15
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 40/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.
Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/postmark: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

MarketPositionDepthRegistered MCP serverDeclares compatibility
Communications (CPaaS) mixed 21.0 - -

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

SMTP
tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 30

Individual APIs this provider publishes, each with its own machine-readable definition.

Postmark Activate API

The Activate API from Postmark — 1 operation(s) for activate.

Postmark Alias API

The Alias API from Postmark — 1 operation(s) for alias.

Postmark Batch API

The Batch API from Postmark — 2 operation(s) for batch.

Postmark Bounceid API

The Bounceid API from Postmark — 3 operation(s) for bounceid.

Postmark Bounces API

The Bounces API API from Postmark — 5 operation(s) for bounces api.

Postmark Bounces API

The Bounces API from Postmark — 2 operation(s) for bounces.

Postmark Browser Families API

The Browser Families API from Postmark — 1 operation(s) for browser families.

Postmark Bypass API

The Bypass API from Postmark — 1 operation(s) for bypass.

Postmark Deliverystats API

The Deliverystats API from Postmark — 1 operation(s) for deliverystats.

Postmark Domains API

The Domains API API from Postmark — 6 operation(s) for domains api.

Postmark Dump API

The Dump API from Postmark — 2 operation(s) for dump.

Postmark Email API

The Email API from Postmark — 4 operation(s) for email.

Postmark Inbound API

The Inbound API from Postmark — 4 operation(s) for inbound.

Postmark Inbound Rules API

The Inbound Rules API API from Postmark — 2 operation(s) for inbound rules api.

Postmark Locations API

The Locations API from Postmark — 1 operation(s) for locations.

Postmark Message Identifier API

The Message Identifier API from Postmark — 2 operation(s) for message identifier.

Postmark Messages API

The Messages API API from Postmark — 11 operation(s) for messages api.

Postmark Messages API

The Messages API from Postmark — 11 operation(s) for messages.

Postmark Outbound API

The Outbound API from Postmark — 20 operation(s) for outbound.

Postmark Sender Signatures API

The Sender Signatures API API from Postmark — 5 operation(s) for sender signatures api.

Postmark Sending API

The Sending API API from Postmark — 4 operation(s) for sending api.

Postmark Server Configuration API

The Server Configuration API API from Postmark — 1 operation(s) for server configuration api.

Postmark Server Management API

The Server Management API API from Postmark — 2 operation(s) for server management api.

Postmark Servers API

The Servers API from Postmark — 1 operation(s) for servers.

Postmark Stats API

The Stats API API from Postmark — 12 operation(s) for stats api.

Postmark Templates API

The Templates API API from Postmark — 6 operation(s) for templates api.

Postmark Templates API

The Templates API from Postmark — 4 operation(s) for templates.

Postmark Triggerid API

The Triggerid API from Postmark — 1 operation(s) for triggerid.

Postmark Triggers API

The Triggers API from Postmark — 4 operation(s) for triggers.

Postmark Email Clients API

The Email Clients API from Postmark — 1 operation(s) for email clients.

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Open Collections 49

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Postmark Account Activate API

OPEN COLLECTION

Postmark Account Activate Alias API

OPEN COLLECTION

Postmark API

OPEN COLLECTION

Postmark Account Activate Batch API

OPEN COLLECTION

Postmark Account Activate Bounceid API

OPEN COLLECTION

Postmark Account Activate Bounces API API

OPEN COLLECTION

Postmark Account Activate Bounces API

OPEN COLLECTION

Postmark Account Activate Browser Families API

OPEN COLLECTION

Postmark Account Activate Bypass API

OPEN COLLECTION

Postmark Account Activate Deliverystats API

OPEN COLLECTION

Postmark Account Activate Domains API API

OPEN COLLECTION

Postmark Account Activate Dump API

OPEN COLLECTION

Postmark Account Activate Email API

OPEN COLLECTION

Postmark Account Activate Emailclients API

OPEN COLLECTION

Postmark Account Activate Inbound API

OPEN COLLECTION

Postmark Account Activate Inbound Rules API API

OPEN COLLECTION

Postmark Account Activate Locations API

OPEN COLLECTION

Postmark Account Activate Message Identifier API

OPEN COLLECTION

Postmark Account Activate Messages API API

OPEN COLLECTION

Postmark Account Activate Messages API

OPEN COLLECTION

Postmark Account Activate Messages > Inbound > {Messageid} API

OPEN COLLECTION

Postmark Account Activate Messages > Outbound > Clicks API

OPEN COLLECTION

Postmark Account Activate Messages > Outbound > {Messageid} API

OPEN COLLECTION

Postmark Account Activate Messages > Outbound > Opens API

OPEN COLLECTION

Postmark Account Activate Outbound API

OPEN COLLECTION

Postmark Account Activate Platforms API

OPEN COLLECTION

Postmark Account Activate Readtimes API

OPEN COLLECTION

Postmark Account Activate Retry API

OPEN COLLECTION

Postmark Account Activate Sender Signatures API API

OPEN COLLECTION

Postmark Account Activate Sending API API

OPEN COLLECTION

Postmark Account Activate Sends API

OPEN COLLECTION

Postmark Account Activate Server Configuration API API

OPEN COLLECTION

Postmark Account Activate Server Management API API

OPEN COLLECTION

Postmark Account Activate Servers API

OPEN COLLECTION

Postmark Account Activate Spam API

OPEN COLLECTION

Postmark Account Activate Statistics API

OPEN COLLECTION

Postmark Account Activate Stats API API

OPEN COLLECTION

Postmark Account Activate Stats/Outbound API

OPEN COLLECTION

Postmark Account Activate Stats/Outbound > Clicks API

OPEN COLLECTION

Postmark Account Activate Stats/Outbound > Opens API

OPEN COLLECTION

Postmark Account Activate Template API

OPEN COLLECTION

Postmark Account Activate Templates API API

OPEN COLLECTION

Postmark Account Activate Templates API

OPEN COLLECTION

Postmark Account Activate Triggerid API

OPEN COLLECTION

Postmark Account Activate Triggers API

OPEN COLLECTION

Postmark Account Activate Triggers > Inboundrules API

OPEN COLLECTION

Postmark Account Activate Triggers > Tags API

OPEN COLLECTION

Postmark Account Activate Validate API

OPEN COLLECTION

Scroll for all 49

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

Postmark MCP Server

Postmark ships an official, first-party MCP server. It is distributed ONLY as a local-stdio npm package — there is no hosted remote endpoint an MCP client can POST to. Postmark'...

MCP SERVER

Agent Skills 6

Packaged agent skills for driving this provider's APIs from an AI assistant.

postmark-email-best-practices

AGENT SKILL

postmark-inbound

AGENT SKILL

postmark-send-email

AGENT SKILL

postmark-templates

AGENT SKILL

postmark-webhooks

AGENT SKILL

postmark

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Postmark Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Postmark Rate Limits

11 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Postmark Finops

FINOPS

Features 16

Notable capabilities this provider offers.

Free: 100 emails/month
Basic: $15/mo for 10K emails
Pro: $16.50/mo for 10K emails with templates and webhooks
Platform: $18/mo for 10K emails with multiple servers and dedicated IPs
Email API and SMTP server
Templates with versioning (Pro+)
Webhooks for delivery, bounce, open, click, spam, subscription events
Bounce and spam complaint handling
Server tokens for per-environment isolation
Send up to 500 emails per batch request
Inbound email parsing
Message Streams (broadcast vs transactional)
OpenTracker beacon for opens/clicks
Suppression management
Dedicated IPs (Platform)
Best-in-class deliverability

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Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Postmark Webhooks

AsyncAPI description of Postmark's outbound webhook surface. Postmark delivers event notifications by issuing HTTP POST requests with a JSON body to a URL the customer configure...

ASYNCAPI

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

Postmark — asyncapi rules

8 rules · 1 errors 7 warnings

SPECTRAL

Postmark — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

OpenAPI Overlays 77

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Postmark Activate Api Overlay

5 actions · servers · postmark-activate-api-openapi.yml

GENERATED

Postmark Activate Api Phrasing Overlay

2 actions · phrasing · postmark-activate-api-openapi.yml

GENERATED

Postmark Alias Api Overlay

5 actions · servers · postmark-alias-api-openapi.yml

GENERATED

Postmark Alias Api Phrasing Overlay

2 actions · phrasing · postmark-alias-api-openapi.yml

GENERATED

Postmark Batch Api Overlay

5 actions · servers · postmark-batch-api-openapi.yml

GENERATED

Postmark Batch Api Phrasing Overlay

3 actions · phrasing · postmark-batch-api-openapi.yml

GENERATED

Postmark Bounceid Api Overlay

5 actions · servers · postmark-bounceid-api-openapi.yml

GENERATED

Postmark Bounceid Api Phrasing Overlay

3 actions · phrasing · postmark-bounceid-api-openapi.yml

GENERATED

Postmark Bounces Api Api Overlay

5 actions · servers · postmark-bounces-api-api-openapi.yml

GENERATED

Postmark Bounces Api Api Phrasing Overlay

6 actions · phrasing · postmark-bounces-api-api-openapi.yml

GENERATED

Postmark Bounces Api Overlay

5 actions · servers · postmark-bounces-api-openapi.yml

GENERATED

Postmark Bounces Api Phrasing Overlay

3 actions · phrasing · postmark-bounces-api-openapi.yml

GENERATED

Postmark Browser Families Api Overlay

5 actions · servers · postmark-browser-families-api-openapi.yml

GENERATED

Postmark Browser Families Api Phrasing Overlay

2 actions · phrasing · postmark-browser-families-api-openapi.yml

GENERATED

Postmark Bypass Api Overlay

5 actions · servers · postmark-bypass-api-openapi.yml

GENERATED

Postmark Bypass Api Phrasing Overlay

2 actions · phrasing · postmark-bypass-api-openapi.yml

GENERATED

Postmark Deliverystats Api Overlay

5 actions · servers · postmark-deliverystats-api-openapi.yml

GENERATED

Postmark Deliverystats Api Phrasing Overlay

2 actions · phrasing · postmark-deliverystats-api-openapi.yml

GENERATED

Postmark Domains Api Api Overlay

5 actions · servers · postmark-domains-api-api-openapi.yml

GENERATED

Postmark Domains Api Api Phrasing Overlay

10 actions · phrasing · postmark-domains-api-api-openapi.yml

GENERATED

Postmark Dump Api Overlay

5 actions · servers · postmark-dump-api-openapi.yml

GENERATED

Postmark Dump Api Phrasing Overlay

2 actions · phrasing · postmark-dump-api-openapi.yml

GENERATED

Postmark Email Api Overlay

5 actions · servers · postmark-email-api-openapi.yml

GENERATED

Postmark Email Api Phrasing Overlay

3 actions · phrasing · postmark-email-api-openapi.yml

GENERATED

Postmark Email Clients Api Phrasing Overlay

2 actions · phrasing · postmark-email-clients-api-openapi.yml

GENERATED

Postmark Emailclients Api Overlay

5 actions · servers · postmark-emailclients-api-openapi.yml

GENERATED

Postmark Inbound Api Overlay

5 actions · servers · postmark-inbound-api-openapi.yml

GENERATED

Postmark Inbound Api Phrasing Overlay

4 actions · phrasing · postmark-inbound-api-openapi.yml

GENERATED

Postmark Inbound Rules Api Api Overlay

5 actions · servers · postmark-inbound-rules-api-api-openapi.yml

GENERATED

Postmark Inbound Rules Api Api Phrasing Overlay

4 actions · phrasing · postmark-inbound-rules-api-api-openapi.yml

GENERATED

Postmark Locations Api Overlay

5 actions · servers · postmark-locations-api-openapi.yml

GENERATED

Postmark Locations Api Phrasing Overlay

2 actions · phrasing · postmark-locations-api-openapi.yml

GENERATED

Postmark Message Identifier Api Overlay

5 actions · servers · postmark-message-identifier-api-openapi.yml

GENERATED

Postmark Message Identifier Api Phrasing Overlay

3 actions · phrasing · postmark-message-identifier-api-openapi.yml

GENERATED

Postmark Messages Api Api Overlay

5 actions · servers · postmark-messages-api-api-openapi.yml

GENERATED

Postmark Messages Api Api Phrasing Overlay

12 actions · phrasing · postmark-messages-api-api-openapi.yml

GENERATED

Postmark Messages Api Overlay

5 actions · servers · postmark-messages-api-openapi.yml

GENERATED

Postmark Messages Api Phrasing Overlay

5 actions · phrasing · postmark-messages-api-openapi.yml

GENERATED

Postmark Messages Inbound Messageid Api Overlay

5 actions · servers · postmark-messages-inbound-messageid-api-openapi.yml

GENERATED

Postmark Messages Outbound Clicks Api Overlay

5 actions · servers · postmark-messages-outbound-clicks-api-openapi.yml

GENERATED

Postmark Messages Outbound Messageid Api Overlay

5 actions · servers · postmark-messages-outbound-messageid-api-openapi.yml

GENERATED

Postmark Messages Outbound Opens Api Overlay

5 actions · servers · postmark-messages-outbound-opens-api-openapi.yml

GENERATED

Postmark Outbound Api Overlay

5 actions · servers · postmark-outbound-api-openapi.yml

GENERATED

Postmark Outbound Api Phrasing Overlay

11 actions · phrasing · postmark-outbound-api-openapi.yml

GENERATED

Postmark Platforms Api Overlay

5 actions · servers · postmark-platforms-api-openapi.yml

GENERATED

Postmark Readtimes Api Overlay

5 actions · servers · postmark-readtimes-api-openapi.yml

GENERATED

Postmark Retry Api Overlay

5 actions · servers · postmark-retry-api-openapi.yml

GENERATED

Postmark Sender Signatures Api Api Overlay

5 actions · servers · postmark-sender-signatures-api-api-openapi.yml

GENERATED

Postmark Sender Signatures Api Api Phrasing Overlay

9 actions · phrasing · postmark-sender-signatures-api-api-openapi.yml

GENERATED

Postmark Sending Api Api Overlay

5 actions · servers · postmark-sending-api-api-openapi.yml

GENERATED

Postmark Sending Api Api Phrasing Overlay

5 actions · phrasing · postmark-sending-api-api-openapi.yml

GENERATED

Postmark Sends Api Overlay

5 actions · servers · postmark-sends-api-openapi.yml

GENERATED

Postmark Server Configuration Api Api Overlay

5 actions · servers · postmark-server-configuration-api-api-openapi.yml

GENERATED

Postmark Server Configuration Api Api Phrasing Overlay

3 actions · phrasing · postmark-server-configuration-api-api-openapi.yml

GENERATED

Postmark Server Management Api Api Overlay

5 actions · servers · postmark-server-management-api-api-openapi.yml

GENERATED

Postmark Server Management Api Api Phrasing Overlay

6 actions · phrasing · postmark-server-management-api-api-openapi.yml

GENERATED

Postmark Servers Api Overlay

5 actions · servers · postmark-servers-api-openapi.yml

GENERATED

Postmark Servers Api Phrasing Overlay

2 actions · phrasing · postmark-servers-api-openapi.yml

GENERATED

Postmark Spam Api Overlay

5 actions · servers · postmark-spam-api-openapi.yml

GENERATED

Postmark Statistics Api Overlay

5 actions · servers · postmark-statistics-api-openapi.yml

GENERATED

Postmark Stats Api Api Overlay

5 actions · servers · postmark-stats-api-api-openapi.yml

GENERATED

Postmark Stats Api Api Phrasing Overlay

13 actions · phrasing · postmark-stats-api-api-openapi.yml

GENERATED

Postmark Stats Outbound Api Overlay

5 actions · servers · postmark-stats-outbound-api-openapi.yml

GENERATED

Postmark Stats Outbound Clicks Api Overlay

5 actions · servers · postmark-stats-outbound-clicks-api-openapi.yml

GENERATED

Postmark Stats Outbound Opens Api Overlay

5 actions · servers · postmark-stats-outbound-opens-api-openapi.yml

GENERATED

Postmark Template Api Overlay

5 actions · servers · postmark-template-api-openapi.yml

GENERATED

Postmark Templates Api Api Overlay

5 actions · servers · postmark-templates-api-api-openapi.yml

GENERATED

Postmark Templates Api Api Phrasing Overlay

10 actions · phrasing · postmark-templates-api-api-openapi.yml

GENERATED

Postmark Templates Api Overlay

5 actions · servers · postmark-templates-api-openapi.yml

GENERATED

Postmark Templates Api Phrasing Overlay

3 actions · phrasing · postmark-templates-api-openapi.yml

GENERATED

Postmark Triggerid Api Overlay

5 actions · servers · postmark-triggerid-api-openapi.yml

GENERATED

Postmark Triggerid Api Phrasing Overlay

2 actions · phrasing · postmark-triggerid-api-openapi.yml

GENERATED

Postmark Triggers Api Overlay

5 actions · servers · postmark-triggers-api-openapi.yml

GENERATED

Postmark Triggers Api Phrasing Overlay

4 actions · phrasing · postmark-triggers-api-openapi.yml

GENERATED

Postmark Triggers Inboundrules Api Overlay

5 actions · servers · postmark-triggers-inboundrules-api-openapi.yml

GENERATED

Postmark Triggers Tags Api Overlay

5 actions · servers · postmark-triggers-tags-api-openapi.yml

GENERATED

Postmark Validate Api Overlay

5 actions · servers · postmark-validate-api-openapi.yml

GENERATED

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JSON Schema 19

Standalone JSON Schema definitions for this provider's data models.

CreateServerPayload

14 properties

JSON SCHEMA

DKIMRotationResponse

12 properties

JSON SCHEMA

DomainCreationModel

2 properties

JSON SCHEMA

DomainEditingModel

1 properties

JSON SCHEMA

DomainExtendedInformation

18 properties

JSON SCHEMA

DomainInformation

6 properties

JSON SCHEMA

DomainListingResults

2 properties

JSON SCHEMA

DomainSPFResult

3 properties

JSON SCHEMA

EditServerPayload

14 properties

JSON SCHEMA

ExtendedServerInfo

19 properties

JSON SCHEMA

SenderListingResults

2 properties

JSON SCHEMA

SenderSignatureCreationModel

4 properties

JSON SCHEMA

SenderSignatureEditingModel

3 properties

JSON SCHEMA

SenderSignatureExtendedInformation

22 properties

JSON SCHEMA

SenderSignatureInformation

6 properties

JSON SCHEMA

ServerListingResponse

2 properties

JSON SCHEMA

StandardPostmarkResponse

2 properties

JSON SCHEMA

TemplatesPushModel

3 properties

JSON SCHEMA

TemplatesPushResponse

2 properties

JSON SCHEMA

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JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Postmark Structure

0 properties

JSON STRUCTURE

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Postmark Authentication

3 schemes

SECURITY

Postmark Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Postmark Trust Center

SOC 2, SSAE 16 SOC 1 Type 2, PCI DSS Level 1, HIPAA, GDPR

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Postmark Agentic Access

108 operations · 42 acting

108 operations · 42 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted
 Signup
Signup
 Login
Login
 Sandbox
Sandbox
 DeveloperPortal
DeveloperPortal

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 AsyncAPI
AsyncAPI
 APIReference
APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 AgentSkills
AgentSkills
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 DataModel
DataModel
 Webhooks
Webhooks
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Build 7

SDKs, sample code, and the tooling you integrate with

GitHub
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Access & Security 4

Authentication, authorization, and security posture

DomainSecurity
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 Authentication
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Operate 6

Status, limits, changes, and where to get help

Support
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 ChangeLog
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Commercial 5

Pricing, plans, and the legal terms of use

Pricing
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 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
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Plans
 FinOps
FinOps

Company 4

The organization behind the API

Website
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 Blog
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 Twitter
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 LinkedIn
LinkedIn

Other 19

Properties that don't map to a standard resource type

Overlay
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Source (apis.yml)

apis.yml Raw ↑ 
aid: postmark
name: Postmark
description: Postmark is an email delivery service that helps businesses send and track transactional and broadcast email
  reliably, replacing SMTP with a scalable service that surfaces detailed delivery analytics, bounce tracking, open and click
  tracking, and dedicated IP addresses.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/postmark.png
url: https://raw.githubusercontent.com/api-evangelist/postmark/refs/heads/main/apis.yml
tags:
- Email
- Messaging
- Transactional Email
- Deliverability
- SMTP
- Email API
- Webhook
- Inbound Email
- Email Templates
- Email Analytics
tags_raw:
- Emails
- Messaging
- Transactional Email
- Deliverability
- SMTP
- Email API
- Webhooks
- Inbound Email
- Email Templates
- Email Analytics
created: '2024-04-14'
modified: '2026-09-16'
specificationVersion: '0.23'
apis:
- aid: postmark:postmark-activate-api
  name: Postmark Activate API
  description: The Activate API from Postmark — 1 operation(s) for activate.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Activate
  properties:
  - type: OpenAPI
    url: openapi/postmark-activate-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-activate-api-overlay.yaml
- aid: postmark:postmark-alias-api
  name: Postmark Alias API
  description: The Alias API from Postmark — 1 operation(s) for alias.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Alias
  properties:
  - type: OpenAPI
    url: openapi/postmark-alias-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-alias-api-overlay.yaml
- aid: postmark:postmark-batch-api
  name: Postmark Batch API
  description: The Batch API from Postmark — 2 operation(s) for batch.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Batch
  properties:
  - type: OpenAPI
    url: openapi/postmark-batch-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-batch-api-overlay.yaml
- aid: postmark:postmark-bounceid-api
  name: Postmark Bounceid API
  description: The Bounceid API from Postmark — 3 operation(s) for bounceid.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Bounceid
  properties:
  - type: OpenAPI
    url: openapi/postmark-bounceid-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-bounceid-api-overlay.yaml
- aid: postmark:postmark-bounces-api-api
  name: Postmark Bounces API
  description: The Bounces API API from Postmark — 5 operation(s) for bounces api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Bounces API
  properties:
  - type: OpenAPI
    url: openapi/postmark-bounces-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-bounces-api-api-overlay.yaml
- aid: postmark:postmark-bounces-api
  name: Postmark Bounces API
  description: The Bounces API from Postmark — 2 operation(s) for bounces.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Bounces
  properties:
  - type: OpenAPI
    url: openapi/postmark-bounces-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-bounces-api-overlay.yaml
- aid: postmark:postmark-browser-families-api
  name: Postmark Browser Families API
  description: The Browser Families API from Postmark — 1 operation(s) for browser families.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Browser Families
  properties:
  - type: OpenAPI
    url: openapi/postmark-browser-families-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-browser-families-api-overlay.yaml
- aid: postmark:postmark-bypass-api
  name: Postmark Bypass API
  description: The Bypass API from Postmark — 1 operation(s) for bypass.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Bypass
  properties:
  - type: OpenAPI
    url: openapi/postmark-bypass-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-bypass-api-overlay.yaml
- aid: postmark:postmark-deliverystats-api
  name: Postmark Deliverystats API
  description: The Deliverystats API from Postmark — 1 operation(s) for deliverystats.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Deliverystats
  properties:
  - type: OpenAPI
    url: openapi/postmark-deliverystats-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-deliverystats-api-overlay.yaml
- aid: postmark:postmark-domains-api-api
  name: Postmark Domains API
  description: The Domains API API from Postmark — 6 operation(s) for domains api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Domains API
  properties:
  - type: OpenAPI
    url: openapi/postmark-domains-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-domains-api-api-overlay.yaml
- aid: postmark:postmark-dump-api
  name: Postmark Dump API
  description: The Dump API from Postmark — 2 operation(s) for dump.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Dump
  properties:
  - type: OpenAPI
    url: openapi/postmark-dump-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-dump-api-overlay.yaml
- aid: postmark:postmark-email-api
  name: Postmark Email API
  description: The Email API from Postmark — 4 operation(s) for email.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Email
  properties:
  - type: OpenAPI
    url: openapi/postmark-email-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-email-api-overlay.yaml
- aid: postmark:postmark-inbound-api
  name: Postmark Inbound API
  description: The Inbound API from Postmark — 4 operation(s) for inbound.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Inbound
  properties:
  - type: OpenAPI
    url: openapi/postmark-inbound-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-inbound-api-overlay.yaml
- aid: postmark:postmark-inbound-rules-api-api
  name: Postmark Inbound Rules API
  description: The Inbound Rules API API from Postmark — 2 operation(s) for inbound rules api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Inbound Rules API
  properties:
  - type: OpenAPI
    url: openapi/postmark-inbound-rules-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-inbound-rules-api-api-overlay.yaml
- aid: postmark:postmark-locations-api
  name: Postmark Locations API
  description: The Locations API from Postmark — 1 operation(s) for locations.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Location
  tags_raw:
  - Locations
  properties:
  - type: OpenAPI
    url: openapi/postmark-locations-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-locations-api-overlay.yaml
- aid: postmark:postmark-message-identifier-api
  name: Postmark Message Identifier API
  description: The Message Identifier API from Postmark — 2 operation(s) for message identifier.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Message Identifier
  properties:
  - type: OpenAPI
    url: openapi/postmark-message-identifier-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-message-identifier-api-overlay.yaml
- aid: postmark:postmark-messages-api-api
  name: Postmark Messages API
  description: The Messages API API from Postmark — 11 operation(s) for messages api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Messages API
  properties:
  - type: OpenAPI
    url: openapi/postmark-messages-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-messages-api-api-overlay.yaml
- aid: postmark:postmark-messages-api
  name: Postmark Messages API
  description: The Messages API from Postmark — 11 operation(s) for messages.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/postmark-messages-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-messages-api-overlay.yaml
- aid: postmark:postmark-outbound-api
  name: Postmark Outbound API
  description: The Outbound API from Postmark — 20 operation(s) for outbound.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Outbound
  properties:
  - type: OpenAPI
    url: openapi/postmark-outbound-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-outbound-api-overlay.yaml
- aid: postmark:postmark-sender-signatures-api-api
  name: Postmark Sender Signatures API
  description: The Sender Signatures API API from Postmark — 5 operation(s) for sender signatures api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Sender Signatures API
  properties:
  - type: OpenAPI
    url: openapi/postmark-sender-signatures-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-sender-signatures-api-api-overlay.yaml
- aid: postmark:postmark-sending-api-api
  name: Postmark Sending API
  description: The Sending API API from Postmark — 4 operation(s) for sending api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Sending API
  properties:
  - type: OpenAPI
    url: openapi/postmark-sending-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-sending-api-api-overlay.yaml
- aid: postmark:postmark-server-configuration-api-api
  name: Postmark Server Configuration API
  description: The Server Configuration API API from Postmark — 1 operation(s) for server configuration api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Server Configuration API
  properties:
  - type: OpenAPI
    url: openapi/postmark-server-configuration-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-server-configuration-api-api-overlay.yaml
- aid: postmark:postmark-server-management-api-api
  name: Postmark Server Management API
  description: The Server Management API API from Postmark — 2 operation(s) for server management api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Server Management API
  properties:
  - type: OpenAPI
    url: openapi/postmark-server-management-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-server-management-api-api-overlay.yaml
- aid: postmark:postmark-servers-api
  name: Postmark Servers API
  description: The Servers API from Postmark — 1 operation(s) for servers.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Servers
  properties:
  - type: OpenAPI
    url: openapi/postmark-servers-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-servers-api-overlay.yaml
- aid: postmark:postmark-stats-api-api
  name: Postmark Stats API
  description: The Stats API API from Postmark — 12 operation(s) for stats api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Stats API
  properties:
  - type: OpenAPI
    url: openapi/postmark-stats-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-stats-api-api-overlay.yaml
- aid: postmark:postmark-templates-api-api
  name: Postmark Templates API
  description: The Templates API API from Postmark — 6 operation(s) for templates api.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Templates API
  properties:
  - type: OpenAPI
    url: openapi/postmark-templates-api-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-templates-api-api-overlay.yaml
- aid: postmark:postmark-templates-api
  name: Postmark Templates API
  description: The Templates API from Postmark — 4 operation(s) for templates.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/postmark-templates-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-templates-api-overlay.yaml
- aid: postmark:postmark-triggerid-api
  name: Postmark Triggerid API
  description: The Triggerid API from Postmark — 1 operation(s) for triggerid.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Triggerid
  properties:
  - type: OpenAPI
    url: openapi/postmark-triggerid-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-triggerid-api-overlay.yaml
- aid: postmark:postmark-triggers-api
  name: Postmark Triggers API
  description: The Triggers API from Postmark — 4 operation(s) for triggers.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Triggers
  properties:
  - type: OpenAPI
    url: openapi/postmark-triggers-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
  - type: Overlay
    url: overlays/postmark-triggers-api-overlay.yaml
- aid: postmark:postmark-email-clients-api
  name: Postmark Email Clients API
  description: The Email Clients API from Postmark — 1 operation(s) for email clients.
  humanURL: https://postmarkapp.com/developer
  baseURL: https://api.postmarkapp.com
  tags:
  - Email Client
  tags_raw:
  - Email Clients
  properties:
  - type: OpenAPI
    url: openapi/postmark-email-clients-api-openapi.yml
  - type: Documentation
    url: https://postmarkapp.com/developer
  - type: GettingStarted
    url: https://postmarkapp.com/developer/api/overview
  - type: Authentication
    url: https://postmarkapp.com/developer/api/overview#authentication
  - type: AsyncAPI
    url: asyncapi/postmark-webhooks-asyncapi.yml
common:
- type: Overlay
  url: overlays/postmark-emailclients-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-messages-inbound-messageid-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-messages-outbound-clicks-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-messages-outbound-messageid-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-messages-outbound-opens-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-platforms-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-readtimes-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-retry-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-sends-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-spam-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-statistics-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-stats-outbound-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-stats-outbound-clicks-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-stats-outbound-opens-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-template-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-triggers-inboundrules-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-triggers-tags-api-overlay.yaml
- type: Overlay
  url: overlays/postmark-validate-api-overlay.yaml
- type: AgenticAccess
  url: agentic-access/postmark-agentic-access.yml
- type: DomainSecurity
  url: security/postmark-domain-security.yml
- name: Agent Skills
  url: https://github.com/ActiveCampaign/postmark-skills
  type: AgentSkills
- type: Website
  url: https://postmarkapp.com
- type: Documentation
  url: https://postmarkapp.com/developer
- type: GettingStarted
  url: https://postmarkapp.com/developer/api/overview
- type: Pricing
  url: https://postmarkapp.com/pricing
- type: Signup
  url: https://account.postmarkapp.com/sign_up
- type: Login
  url: https://account.postmarkapp.com/login
- type: Blog
  url: https://postmarkapp.com/blog
- type: Support
  url: https://postmarkapp.com/support
- type: StatusPage
  url: https://status.postmarkapp.com
- type: Templates
  url: https://postmarkapp.com/transactional-email-templates
- type: ChangeLog
  url: https://postmarkapp.com/updates
- type: TermsOfService
  url: https://postmarkapp.com/terms-of-service
- type: PrivacyPolicy
  url: https://wildbit.com/privacy
- type: GitHub
  url: https://github.com/ActiveCampaign
- type: Twitter
  url: https://twitter.com/postmarkapp
- type: LinkedIn
  url: https://www.linkedin.com/company/postmarkapp
- type: Features
  data:
  - 'Free: 100 emails/month'
  - 'Basic: $15/mo for 10K emails'
  - 'Pro: $16.50/mo for 10K emails with templates and webhooks'
  - 'Platform: $18/mo for 10K emails with multiple servers and dedicated IPs'
  - Email API and SMTP server
  - Templates with versioning (Pro+)
  - Webhooks for delivery, bounce, open, click, spam, subscription events
  - Bounce and spam complaint handling
  - Server tokens for per-environment isolation
  - Send up to 500 emails per batch request
  - Inbound email parsing
  - Message Streams (broadcast vs transactional)
  - OpenTracker beacon for opens/clicks
  - Suppression management
  - Dedicated IPs (Platform)
  - Best-in-class deliverability
  sources:
  - https://postmarkapp.com/pricing
  updated: '2026-05-04'
- type: Packages
  url: packages/postmark-packages.yml
- type: SDKs
  url: packages/postmark-packages.yml
- type: MCPServer
  url: mcp/postmark-mcp.yml
- type: ToolCrosswalk
  url: mcp/postmark-tool-crosswalk.yml
- type: LLMsTxt
  url: llms/postmark-llms.txt
- type: Conformance
  url: conformance/postmark-conformance.yml
- type: Compliance
  url: security/postmark-trust-center.yml
- type: TrustCenter
  url: security/postmark-trust-center.yml
- type: ErrorCatalog
  url: errors/postmark-problem-types.yml
- type: Lifecycle
  url: lifecycle/postmark-lifecycle.yml
- type: Deprecation
  url: lifecycle/postmark-lifecycle.yml
- type: Authentication
  url: authentication/postmark-authentication.yml
- type: Conventions
  url: conventions/postmark-conventions.yml
- type: ChangeLog
  url: changelog/postmark-changelog.yml
- type: CLI
  url: cli/postmark-cli.yml
- type: DataModel
  url: data-model/postmark-data-model.yml
- type: Sandbox
  url: sandbox/postmark-sandbox.yml
- type: Plans
  url: plans/postmark-plans-pricing.yml
- type: RateLimits
  url: rate-limits/postmark-rate-limits.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/postmark-webhooks-asyncapi.yml
- type: AsyncAPI
  url: asyncapi/postmark-webhooks-asyncapi.yml
- type: FinOps
  url: finops/postmark-finops.yml
- type: Vocabulary
  url: vocabulary/postmark-vocabulary.yml
- type: DeveloperPortal
  url: https://postmarkapp.com/developer
- type: APIReference
  url: https://postmarkapp.com/developer/api/overview
- type: GitHubOrganization
  url: https://github.com/ActiveCampaign
- type: Postman
  url: https://god.gw.postman.com/run-collection/15802082-f50b3ffc-9eee-4ab1-bdc5-8b423d19d535?action=collection%2Ffork&source=rip_markdown&collection-url=entityId%3D15802082-f50b3ffc-9eee-4ab1-bdc5-8b423d19d535%26entityType%3Dcollection%26workspaceId%3D55e9c6f2-5d69-40a5-b00b-caec1640454c
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 63
  pass: local-v1

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