# Postmark **Canonical:** https://apis.io/providers/postmark/ **Website:** https://postmarkapp.com **APIs profiled:** 47 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. ## Kin Score — 71.2 / 100 (exemplar) Scored 2026-08-20 under rubric 0.12.0. Trend: flat (-1.9 from 73.1). | Facet | Score | |---|---| | Discoverability | 57.4 | | Contract Quality | 60.1 | | Governance | 43.2 | | Contract Governance | 43.2 | | Operational Transparency | 81.6 | | Developer Ergonomics | 90.5 | | Commercial Clarity | 82.9 | | Access Clarity | 82.9 | ## Agent readiness — 51.5 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | no | | MCP Server | documented | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | verified | | Rate Limit Signal | documented | | Event Surface Described | derived | | Agent Skills | yes | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium). ## APIs (47) - **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 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 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 Emailclients API** — The Emailclients API from Postmark — 1 operation(s) for emailclients. - **Postmark Inbound API** — The Inbound API from Postmark — 4 operation(s) for inbound. - **Postmark Inbound Rules API 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 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 Messages > Inbound > {Messageid} API** — The Messages > Inbound > {Messageid} API from Postmark — 1 operation(s) for messages > inbound > {messageid}. - **Postmark Messages > Outbound > Clicks API** — The Messages > Outbound > Clicks API from Postmark — 1 operation(s) for messages > outbound > clicks. - **Postmark Messages > Outbound > {Messageid} API** — The Messages > Outbound > {Messageid} API from Postmark — 1 operation(s) for messages > outbound > {messageid}. - **Postmark Messages > Outbound > Opens API** — The Messages > Outbound > Opens API from Postmark — 1 operation(s) for messages > outbound > opens. - **Postmark Outbound API** — The Outbound API from Postmark — 20 operation(s) for outbound. - **Postmark Platforms API** — The Platforms API from Postmark — 2 operation(s) for platforms. - **Postmark Readtimes API** — The Readtimes API from Postmark — 1 operation(s) for readtimes. - **Postmark Retry API** — The Retry API from Postmark — 1 operation(s) for retry. - **Postmark Sender Signatures API API** — The Sender Signatures API API from Postmark — 5 operation(s) for sender signatures api. - **Postmark Sending API API** — The Sending API API from Postmark — 4 operation(s) for sending api. - **Postmark Sends API** — The Sends API from Postmark — 1 operation(s) for sends. - **Postmark Server Configuration API API** — The Server Configuration API API from Postmark — 1 operation(s) for server configuration api. - **Postmark Server Management API 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 Spam API** — The Spam API from Postmark — 1 operation(s) for spam. - **Postmark Statistics API** — The Statistics API from Postmark — 13 operation(s) for statistics. - **Postmark Stats API API** — The Stats API API from Postmark — 12 operation(s) for stats api. - **Postmark Stats/Outbound API** — The Stats/Outbound API from Postmark — 2 operation(s) for stats/outbound. - **Postmark Stats/Outbound > Clicks API** — The Stats/Outbound > Clicks API from Postmark — 1 operation(s) for stats/outbound > clicks. - **Postmark Stats/Outbound > Opens API** — The Stats/Outbound > Opens API from Postmark — 1 operation(s) for stats/outbound > opens. - **Postmark Template API** — The Template API from Postmark — 2 operation(s) for template. - …and 7 more, listed in full on the page. ## MCP servers (1) - **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'... ## Agentic access (1) - **Postmark Agentic Access** — 108 operations · 42 acting ## Security (3) - **Postmark Authentication** — 3 schemes - **Postmark Domain Security** — TLSv1.3 · HSTS · DMARC - **Postmark Trust Center** — SOC 2, SSAE 16 SOC 1 Type 2, PCI DSS Level 1, HIPAA, GDPR ## Plans (1) - **Postmark Plans Pricing** ## Tags Emails, Messaging, Transactional Email, Deliverability, SMTP, Email API, Webhook, Inbound Email, Email Templates, Email Analytics --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/postmark/). Scores are computed from the provider's own public artifacts under a published rubric.