Mailgun

Mailgun (by Sinch) is a transactional email API service for developers to send, receive, validate, and track emails at scale. The platform provides SMTP and HTTP APIs for sending email, inbound message routing, deliverability analytics, suppression management, and email validation with regional endpoints for US and EU data residency.

Mailgun publishes 7 APIs on the APIs.io network, including Domains API, Events API, Mailing Lists API, and 4 more. Tagged areas include Email, Transactional Email, SMTP, Email Validation, and Email Delivery.

Mailgun’s developer surface includes authentication, documentation, signup flow, pricing, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.4/100 thin ▬ flat Agent 26/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0

AccessSelf serve

8 APIs

Email Transactional Email SMTP Email Validation Email Delivery Messaging

Kin Score

Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0

Composite quality — 34.4/100 · thin

Contract Quality 13.7 / 25

Developer Ergonomics 6.7 / 20

Access Clarity 6.3 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.0 / 12

Discoverability 7.4 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/mailgun: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 8

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

Open Collections 10

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

GraphQL 1

GraphQL schemas published by this provider.

Get Started 2

Portal, sign-up, and the first successful call

Signup

Signup

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Authentication

Authentication

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: mailgun
name: Mailgun
description: Mailgun (by Sinch) is a transactional email API service for developers to send, receive, validate, and track
  emails at scale. The platform provides SMTP and HTTP APIs for sending email, inbound message routing, deliverability analytics,
  suppression management, and email validation with regional endpoints for US and EU data residency.
type: Index
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mailgun.png
tags:
- Email
- Transactional Email
- SMTP
- Email Validation
- Email Delivery
- Messaging
url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-30'
specificationVersion: '0.23'
apis:
- aid: mailgun:validate-api
  name: Mailgun Email Validation API
  description: REST API for verifying email addresses in real time, bulk list validation, and deliverability scoring to reduce
    bounces and improve sender reputation.
  humanURL: https://documentation.mailgun.com/docs/validate/api-overview
  baseURL: https://api.mailgun.net
  tags:
  - Email Validation
  - Verification
  - Deliverability
  properties:
  - type: Documentation
    url: https://documentation.mailgun.com/docs/validate/api-overview
- aid: mailgun:mailgun-domains-api
  name: Mailgun Domains API
  description: The Domains API from Mailgun — 2 operation(s) for domains.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Domains
  properties:
  - type: OpenAPI
    url: openapi/mailgun-domains-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
- aid: mailgun:mailgun-events-api
  name: Mailgun Events API
  description: The Events API from Mailgun — 1 operation(s) for events.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Event
  tags_raw:
  - Events
  properties:
  - type: OpenAPI
    url: openapi/mailgun-events-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
- aid: mailgun:mailgun-mailing-lists-api
  name: Mailgun Mailing Lists API
  description: The Mailing Lists API from Mailgun — 1 operation(s) for mailing lists.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Mailing Lists
  properties:
  - type: OpenAPI
    url: openapi/mailgun-mailing-lists-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
- aid: mailgun:mailgun-messages-api
  name: Mailgun Messages API
  description: The Messages API from Mailgun — 2 operation(s) for messages.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Message
  tags_raw:
  - Messages
  properties:
  - type: OpenAPI
    url: openapi/mailgun-messages-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
- aid: mailgun:mailgun-routes-api
  name: Mailgun Routes API
  description: The Routes API from Mailgun — 1 operation(s) for routes.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Routes
  properties:
  - type: OpenAPI
    url: openapi/mailgun-routes-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
- aid: mailgun:mailgun-suppressions-api
  name: Mailgun Suppressions API
  description: The Suppressions API from Mailgun — 3 operation(s) for suppressions.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Suppressions
  properties:
  - type: OpenAPI
    url: openapi/mailgun-suppressions-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
- aid: mailgun:mailgun-webhooks-api
  name: Mailgun Webhooks API
  description: The Webhooks API from Mailgun — 2 operation(s) for webhooks.
  humanURL: https://documentation.mailgun.com/docs/mailgun/api-reference/
  baseURL: https://api.mailgun.net
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/mailgun-webhooks-api-openapi.yml
  - type: Documentation
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/
  - type: API Overview
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/api-overview
  - type: Authentication
    url: https://documentation.mailgun.com/docs/mailgun/api-reference/mg-auth
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/mailgun/refs/heads/main/openapi/mailgun-webhooks-asyncapi.yml
  - type: GraphQL
    url: graphql/mailgun-graphql.md
common:
- type: AgenticAccess
  url: agentic-access/mailgun-agentic-access.yml
- type: TrustCenter
  url: security/mailgun-trust-center.yml
- type: DomainSecurity
  url: security/mailgun-domain-security.yml
- type: Authentication
  url: authentication/mailgun-authentication.yml
- type: GitHubOrganization
  url: https://github.com/mailgun
- type: LinkedIn
  url: https://www.linkedin.com/company/mailgun
- type: Website
  url: https://www.mailgun.com
- type: Documentation
  url: https://documentation.mailgun.com/
- type: Signup
  url: https://signup.mailgun.com/new/signup
- type: Pricing
  url: https://www.mailgun.com/pricing/
- type: DeveloperPortal
  url: https://documentation.mailgun.com/
- type: Blog
  url: https://www.mailgun.com/blog/feed/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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