SMTP2GO

SMTP2GO is a New Zealand-founded email and SMS delivery platform, running since 2006, that sends and tracks transactional and marketing messages over SMTP relay or a JSON REST API from data centres in the United States, the European Union and Australia. The v3 API covers sending standard, MIME, batch and scheduled email, sending and receiving SMS, verifying sender domains and single sender addresses, managing SMTP users, API keys, IP allow lists and IP authentication, templates, webhooks, suppressions, subaccounts, dedicated IPs and the email archive, plus activity search and delivery statistics. It also ships a remote MCP server and a published Agent Skill for AI agents.

SMTP2GO publishes 18 APIs on the APIs.io network, including Activity API, API Keys API, SMS API, and 15 more. Tagged areas include Email, Email Delivery, Transactional Email, SMTP, and SMS.

The SMTP2GO catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

SMTP2GO’s developer surface includes authentication, documentation, API reference, engineering blog, pricing, support, changelog, and 33 more developer resources.

🌐 Visit website 📡 Source on GitHub

71.7/100 exemplar ▬ flat Agent 39/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

1 APIs 1 MCP Servers

Email Email Delivery Transactional Email SMTP SMS Email API Deliverability Webhook Messaging Communications MCP Agent Skills

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 71.7/100 · exemplar

Contract Quality 14.0 / 19

Developer Ergonomics 9.5 / 15

Access Clarity 13.8 / 15

Operational Transparency 7.4 / 10

Contract Governance 2.5 / 9

Discoverability 5.7 / 8

Regulatory Posture 6.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 39/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 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 Telecommunications 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/smtp2go: 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 →

APIs 18

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

SMTP2GO Activity API

Email activity search

SMTP2GO API Keys API

API key management

SMTP2GO SMS API

Send and receive SMS messages

SMTP2GO SMTP Users API

SMTP user account management

SMTP2GO Subaccounts API

Subaccount management

SMTP2GO Suppressions API

Suppression list management

SMTP2GO Templates API

Email template management

SMTP2GO Webhooks API

Webhook configuration

SMTP2GO ALLOWED RECIPIENTS API

Manage the allowed recipients list

SMTP2GO ALLOWED SENDERS API

Manage the allowed/restricted senders list

SMTP2GO DEDICATED IPS API

View dedicated IP addresses on the account

SMTP2GO EMAIL ARCHIVE API

Search and retrieve archived email content

SMTP2GO EMAILS API

Send standard, MIME and batch email; manage scheduled sends

SMTP2GO IP Allow List API

Manage the account IP allow list for SMTP and API access

SMTP2GO IP AUTH API

Manage IP-authenticated sending entries

SMTP2GO SENDER DOMAINS API

Add, verify and manage sender domains, tracking and return-path subdomains

SMTP2GO SINGLE SENDER EMAILS API

Verify individual From addresses

SMTP2GO STATISTICS API

Delivery, bounce, spam, unsubscribe and cycle statistics

Scroll for all 18

Open Collections 12

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

API Collection

OPEN COLLECTION

SMTP2GO Email Activity API

OPEN COLLECTION

SMTP2GO Email Activity API Keys API

OPEN COLLECTION

SMTP2GO Email Activity Domains API

OPEN COLLECTION

SMTP2GO Activity Email API

OPEN COLLECTION

SMTP2GO Email Activity SMS API

OPEN COLLECTION

SMTP2GO Email Activity SMTP Users API

OPEN COLLECTION

SMTP2GO Email Activity Stats API

OPEN COLLECTION

SMTP2GO Email Activity Subaccounts API

OPEN COLLECTION

SMTP2GO Email Activity Suppressions API

OPEN COLLECTION

SMTP2GO Email Activity Templates API

OPEN COLLECTION

SMTP2GO Email Activity Webhooks API

OPEN COLLECTION

Scroll for all 12

MCP Servers 1

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

SMTP2GO remote MCP server

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Smtp2Go Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Smtp2Go Rate Limits

9 limits

RATE LIMITS

FinOps 1

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

Smtp2Go Finops

FINOPS

Event Specifications 1

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

Smtp2Go Webhooks

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Smtp2Go Context

9 classes · 66 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SMTP2GO API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 2

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

SMTP2GO Send Email Request

15 properties

JSON SCHEMA

SMTP2GO Suppression

6 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Add Suppression Example

4 fields

EXAMPLE

Send Email Example

4 fields

EXAMPLE

Send Sms Example

4 fields

EXAMPLE

Security Posture 2

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

Smtp2Go Authentication

apiKey · 2 schemes

SECURITY

Smtp2Go Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Smtp2Go Agentic Access

52 operations · 52 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Sandbox

DeveloperPortal

GettingStarted

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

AgentSkill

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Webhooks

DataModel

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrg

Packages

SDKs

ToolCrosswalk

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Compliance

Compliance

Operate 5

Status, limits, changes, and where to get help

StatusPage

Support

RateLimits

ChangeLog

ChangeLog

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

name: SMTP2GO
description: SMTP2GO is a New Zealand-founded email and SMS delivery platform, running since 2006, that sends and tracks transactional
  and marketing messages over SMTP relay or a JSON REST API from data centres in the United States, the European Union and
  Australia. The v3 API covers sending standard, MIME, batch and scheduled email, sending and receiving SMS, verifying sender
  domains and single sender addresses, managing SMTP users, API keys, IP allow lists and IP authentication, templates, webhooks,
  suppressions, subaccounts, dedicated IPs and the email archive, plus activity search and delivery statistics. It also ships
  a remote MCP server and a published Agent Skill for AI agents.
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: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/smtp2go.png
url: https://raw.githubusercontent.com/api-evangelist/smtp2go/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-08-13'
specificationVersion: '0.23'
aid: smtp2go
type: Index
tags:
- Email
- Email Delivery
- Transactional Email
- SMTP
- SMS
- Email API
- Deliverability
- Webhook
- Messaging
- Communications
- MCP
- Agent Skills
tags_raw:
- Email
- Email Delivery
- Transactional Email
- SMTP
- SMS
- Email API
- Deliverability
- Webhooks
- Messaging
- Communications
- MCP
- Agent Skills
apis:
- aid: smtp2go:smtp2go-activity-api
  name: SMTP2GO Activity API
  description: Email activity search
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Activity
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-activity-api-openapi.yml
- aid: smtp2go:smtp2go-api-keys-api
  name: SMTP2GO API Keys API
  description: API key management
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-api-keys-api-openapi.yml
- aid: smtp2go:smtp2go-sms-api
  name: SMTP2GO SMS API
  description: Send and receive SMS messages
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - SMS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-sms-api-openapi.yml
- aid: smtp2go:smtp2go-smtp-users-api
  name: SMTP2GO SMTP Users API
  description: SMTP user account management
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - SMTP Users
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-smtp-users-api-openapi.yml
- aid: smtp2go:smtp2go-subaccounts-api
  name: SMTP2GO Subaccounts API
  description: Subaccount management
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Subaccounts
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-subaccounts-api-openapi.yml
- aid: smtp2go:smtp2go-suppressions-api
  name: SMTP2GO Suppressions API
  description: Suppression list management
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Suppressions
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-suppressions-api-openapi.yml
- aid: smtp2go:smtp2go-templates-api
  name: SMTP2GO Templates API
  description: Email template management
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-templates-api-openapi.yml
- aid: smtp2go:smtp2go-webhooks-api
  name: SMTP2GO Webhooks API
  description: Webhook configuration
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-webhooks-api-openapi.yml
- aid: smtp2go:smtp2go-allowed-recipients-api
  name: SMTP2GO ALLOWED RECIPIENTS API
  description: Manage the allowed recipients list
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - ALLOWED RECIPIENTS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-allowed-recipients-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-allowed-senders-api
  name: SMTP2GO ALLOWED SENDERS API
  description: Manage the allowed/restricted senders list
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - ALLOWED SENDERS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-allowed-senders-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-dedicated-ips-api
  name: SMTP2GO DEDICATED IPS API
  description: View dedicated IP addresses on the account
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - DEDICATED IPS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-dedicated-ips-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-email-archive-api
  name: SMTP2GO EMAIL ARCHIVE API
  description: Search and retrieve archived email content
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - EMAIL ARCHIVE
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-email-archive-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-emails-api
  name: SMTP2GO EMAILS API
  description: Send standard, MIME and batch email; manage scheduled sends
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Emails
  tags_raw:
  - EMAILS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-emails-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-ip-allow-list-api
  name: SMTP2GO IP Allow List API
  description: Manage the account IP allow list for SMTP and API access
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - IP Allowlist
  tags_raw:
  - IP Allow List
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-ip-allow-list-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-ip-auth-api
  name: SMTP2GO IP AUTH API
  description: Manage IP-authenticated sending entries
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - IP AUTH
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-ip-auth-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-sender-domains-api
  name: SMTP2GO SENDER DOMAINS API
  description: Add, verify and manage sender domains, tracking and return-path subdomains
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - SENDER DOMAINS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-sender-domains-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-single-sender-emails-api
  name: SMTP2GO SINGLE SENDER EMAILS API
  description: Verify individual From addresses
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - SINGLE SENDER EMAILS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-single-sender-emails-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
- aid: smtp2go:smtp2go-statistics-api
  name: SMTP2GO STATISTICS API
  description: Delivery, bounce, spam, unsubscribe and cycle statistics
  humanURL: https://developers.smtp2go.com/docs/introduction-guide
  baseURL: https://api.smtp2go.com/v3
  tags:
  - Statistics
  tags_raw:
  - STATISTICS
  properties:
  - type: OpenAPI
    url: openapi/smtp2go-statistics-api-openapi.yml
  - type: Documentation
    url: https://developers.smtp2go.com/docs/introduction-guide
  - type: GettingStarted
    url: https://developers.smtp2go.com/docs/getting-started
  - type: Endpoints
    url: https://developers.smtp2go.com/docs/endpoints
  - type: RateLimits
    url: https://developers.smtp2go.com/docs/rate-limiting
  - type: APIReference
    url: https://developers.smtp2go.com/reference/general-api-resources
common:
- type: CapabilityMap
  url: capabilities/smtp2go-capability-edges.yml
  name: SMTP2GO Business Capability Map
- type: AgenticAccess
  url: agentic-access/smtp2go-agentic-access.yml
- type: DomainSecurity
  url: security/smtp2go-domain-security.yml
- type: Authentication
  url: authentication/smtp2go-authentication.yml
- type: Website
  url: https://www.smtp2go.com/
- type: Documentation
  url: https://developers.smtp2go.com/docs/introduction-guide
- type: APIReference
  url: https://developers.smtp2go.com/reference/general-api-resources
- type: GitHubOrg
  url: https://github.com/smtp2go-oss
- type: Blog
  url: https://www.smtp2go.com/blog/
- type: Pricing
  url: https://www.smtp2go.com/pricing/
- type: StatusPage
  url: https://smtp2gostatus.com/
- type: LinkedIn
  url: https://www.linkedin.com/company/smtp2go
- type: X
  url: https://x.com/smtp2go
- type: Support
  url: https://support.smtp2go.com/
- type: Plans
  url: plans/smtp2go-plans-pricing.yml
- type: RateLimits
  url: rate-limits/smtp2go-rate-limits.yml
- type: FinOps
  url: finops/smtp2go-finops.yml
- type: Packages
  name: SMTP2GO client libraries
  url: packages/smtp2go-packages.yml
- type: SDKs
  name: SMTP2GO official SDKs
  url: packages/smtp2go-packages.yml
- type: MCPServer
  name: SMTP2GO remote MCP server
  url: mcp/smtp2go-mcp.yml
- type: ToolCrosswalk
  name: SMTP2GO MCP tool to REST operation crosswalk
  url: mcp/smtp2go-tool-crosswalk.yml
- type: AgentSkill
  name: SMTP2GO Agent Skills
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/smtp2go-llms.txt
- type: Overlay
  url: overlays/smtp2go-api-overlay.yaml
- type: Conventions
  url: conventions/smtp2go-conventions.yml
- type: ErrorCatalog
  url: errors/smtp2go-problem-types.yml
- type: Lifecycle
  url: lifecycle/smtp2go-lifecycle.yml
- type: ChangeLog
  url: changelog/smtp2go-changelog.yml
- type: ChangeLog
  name: SMTP2GO API changelog
  url: https://developers.smtp2go.com/reference/changelog
- type: Conformance
  url: conformance/smtp2go-conformance.yml
- type: Compliance
  name: Security and Privacy at SMTP2GO
  url: https://www.smtp2go.com/blog/security-and-privacy-at-smtp2go/
- type: Webhooks
  name: SMTP2GO webhook event surface
  url: asyncapi/smtp2go-webhooks.yml
- type: Sandbox
  name: SMTP2GO Sandbox Mode
  url: sandbox/smtp2go-sandbox.yml
- type: DataModel
  url: data-model/smtp2go-data-model.yml
- type: DeveloperPortal
  url: https://developers.smtp2go.com/
- type: GettingStarted
  url: https://developers.smtp2go.com/docs/getting-started
- type: SignUp
  url: https://www.smtp2go.com/pricing/signup/
- type: Login
  url: https://app.smtp2go.com/login/
- type: TermsOfService
  url: https://www.smtp2go.com/terms/
- type: PrivacyPolicy
  url: https://www.smtp2go.com/privacy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 21
  pass: local-v1

Work with this as data

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Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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Every operation they expose

curl "https://apis.io/api/v1/providers/smtp2go/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/smtp2go/evidence"

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