MailBridgeAPI

MailBridgeAPI provides a programmable email API that connects to SMTP and IMAP mailboxes, offering endpoints to send, receive, search and manage email without exposing mailbox passwords. It supports integrations with Gmail, Microsoft 365, Yahoo, Zoho, Apple iCloud, and custom mail servers, featuring AI-powered auto-reply, mobile app control, and detailed analytics. Developers can quickly test connections via a free trial, and companies gain secure, auditable email handling for critical communications.

MailBridgeAPI publishes 7 API contracts indexed on the APIs.io network, including Activity API, Compliance API, Mailbox API, and 4 more. Tagged areas include Email API, SMTP, IMAP, mailbox integration, and Developer Tools.

The MailBridgeAPI catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

MailBridgeAPI’s developer surface includes authentication, documentation, pricing, signup flow, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

42.3/100 developing Agent 31/100 agent ready Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

1 published contract

Email API SMTP IMAPmailbox integrationDeveloper Toolsmailbox monitoring

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 42.3/100 · developing

Contract Quality 11.8 / 21

Developer Ergonomics 5.6 / 17

Access Clarity 7.6 / 17

Operational Transparency 1.2 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 31/100 · agent ready

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 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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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/mailbridgeapi: 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 →

Standards implemented 2

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.

IMAP

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

SMTP

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

APIs 7

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

MailBridgeAPI Email API

Turn your own mailbox into a secure email API.

MailBridgeAPI Activity API

Search messages and build delivery or usage reporting.

MailBridgeAPI Compliance API

Read unsubscribe information for your own contact workflows.

MailBridgeAPI Mailbox API

Inspect mailbox readiness and operational health.

MailBridgeAPI Receiving API

Read incoming messages from the mailbox or the normalized received-message API.

MailBridgeAPI Sending API

Send and validate email through the selected mailbox.

MailBridgeAPI Service API

Public service availability.

Scroll for all 7

Semantic Vocabularies 1

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

Mailbridgeapi Context

11 classes · 52 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

MailBridgeAPI API Rules

14 rules · 12 errors 1 warnings 1 info

SPECTRAL

Security Posture 3

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

Mailbridgeapi Authentication

apiKey · 4 schemes

SECURITY

Mailbridgeapi Domain Security

TLSv1.3 · DMARC

SECURITY

Mailbridgeapi Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Mailbridgeapi Agentic Access

12 operations · 2 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 5

Authentication, authorization, and security posture

Security

Security

SecurityTxt

SecurityTxt

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: mailbridgeapi
name: MailBridgeAPI
image: https://mailbridgeapi.com/og.png
description: MailBridgeAPI provides a programmable email API that connects to SMTP and IMAP mailboxes, offering endpoints
  to send, receive, search and manage email without exposing mailbox passwords. It supports integrations with Gmail, Microsoft
  365, Yahoo, Zoho, Apple iCloud, and custom mail servers, featuring AI-powered auto-reply, mobile app control, and detailed
  analytics. Developers can quickly test connections via a free trial, and companies gain secure, auditable email handling
  for critical communications.
url: https://raw.githubusercontent.com/api-evangelist/mailbridgeapi/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-21 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-21'
modified: '2026-10-21'
tags:
- Email API
- SMTP
- IMAP
- mailbox integration
- Developer Tools
- mailbox monitoring
tags_raw:
- email API
- SMTP
- IMAP
- mailbox integration
- developer tools
- mailbox monitoring
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/mailbridgeapi-agentic-access.yml
- type: Spectral
  url: rules/mailbridgeapi-rules.yml
- type: JSONLD
  url: json-ld/mailbridgeapi-context.jsonld
- type: Vocabulary
  url: vocabulary/mailbridgeapi-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/mailbridgeapi-data-model.yml
- type: Security
  url: https://mailbridgeapi.com/vulnerability-reporting/
- type: ErrorCatalog
  url: errors/mailbridgeapi-problem-types.yml
- type: Conformance
  url: conformance/mailbridgeapi-conformance.yml
- type: LLMsTxt
  url: llms/mailbridgeapi-llms.txt
- type: SecurityTxt
  url: well-known/mailbridgeapi-security.txt
- type: WellKnown
  url: well-known/mailbridgeapi-well-known.yml
- type: Hosts
  url: hosts/mailbridgeapi-hosts.yml
- type: Authentication
  url: authentication/mailbridgeapi-authentication.yml
- type: VulnerabilityDisclosure
  url: security/mailbridgeapi-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/mailbridgeapi-domain-security.yml
- type: Website
  url: https://mailbridgeapi.com/
- type: Documentation
  url: https://mailbridgeapi.com/doc/
- type: DeveloperPortal
  url: https://mailbridgeapi.com/
- type: Pricing
  url: https://mailbridgeapi.com/pricing/
- type: SignUp
  url: https://mailbridgeapi.com/signup/
- type: TermsOfService
  url: https://mailbridgeapi.com/terms-and-conditions-of-sale/
- type: PrivacyPolicy
  url: https://mailbridgeapi.com/privacy-policy/
apis:
- name: MailBridgeAPI Email API
  description: Turn your own mailbox into a secure email API.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  aid: mailbridgeapi:mailbridgeapi-email-api
- aid: mailbridgeapi:mailbridgeapi-activity-api
  name: MailBridgeAPI Activity API
  description: Search messages and build delivery or usage reporting.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  tags:
  - Activity
  properties:
  - type: OpenAPI
    url: openapi/mailbridgeapi-activity-api-openapi.yml
- aid: mailbridgeapi:mailbridgeapi-compliance-api
  name: MailBridgeAPI Compliance API
  description: Read unsubscribe information for your own contact workflows.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  tags:
  - Compliance
  properties:
  - type: OpenAPI
    url: openapi/mailbridgeapi-compliance-api-openapi.yml
- aid: mailbridgeapi:mailbridgeapi-mailbox-api
  name: MailBridgeAPI Mailbox API
  description: Inspect mailbox readiness and operational health.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  tags:
  - Mailbox
  properties:
  - type: OpenAPI
    url: openapi/mailbridgeapi-mailbox-api-openapi.yml
- aid: mailbridgeapi:mailbridgeapi-receiving-api
  name: MailBridgeAPI Receiving API
  description: Read incoming messages from the mailbox or the normalized received-message API.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  tags:
  - Receiving
  properties:
  - type: OpenAPI
    url: openapi/mailbridgeapi-receiving-api-openapi.yml
- aid: mailbridgeapi:mailbridgeapi-sending-api
  name: MailBridgeAPI Sending API
  description: Send and validate email through the selected mailbox.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  tags:
  - Sending
  properties:
  - type: OpenAPI
    url: openapi/mailbridgeapi-sending-api-openapi.yml
- aid: mailbridgeapi:mailbridgeapi-service-api
  name: MailBridgeAPI Service API
  description: Public service availability.
  humanURL: https://mailbridgeapi.com/doc/
  baseURL: https://api.mailbridgeapi.com/
  tags:
  - Services
  tags_raw:
  - Service
  properties:
  - type: OpenAPI
    url: openapi/mailbridgeapi-service-api-openapi.yml
x-submission-notes: OpenAPI 3.1 https://api.mailbridgeapi.com/openapi.json 200; Postman; GitHub
x-submission-probe: root 200, docs 200, openapi 200 JSON 38KB
x-submitted-by: info@mailbridgeapi.com (submission, 2026-10-20)
x-enrichment:
  date: '2026-10-21'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

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