Maileroo website screenshot

Maileroo

Maileroo provides transactional and marketing email delivery via a developer-friendly REST API with high deliverability, SMTP relay support, email tracking, and SDKs for popular programming languages. Trusted by businesses of all sizes to handle millions of emails every month.

Maileroo publishes 2 APIs on the APIs.io network: Emails API and Scheduled API. Tagged areas include Email, Email Delivery, Marketing Email, SMTP, and Transactional Email.

Maileroo’s developer surface includes authentication, developer portal, documentation, signup flow, pricing, engineering blog, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
46.6/100 developing ▬ flat Agent 38/100 agent ready Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumSelf serve⚡ Free to try
2 APIs
EmailEmail DeliveryMarketing EmailSMTPTransactional Email

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 46.6/100 · developing
Contract Quality 16.3 / 25
Developer Ergonomics 6.1 / 20
Commercial Clarity 12.6 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 38/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 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/maileroo: 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 2

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

Maileroo Emails API

Send transactional and bulk emails

Maileroo Scheduled API

Manage scheduled email deliveries

Open Collections 1

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

Maileroo Email API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Maileroo Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Maileroo Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Maileroo Finops

FINOPS

Security Posture 2

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

Maileroo Authentication

apiKey/http · 2 schemes

SECURITY

Maileroo Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Maileroo Agentic Access

5 operations · 4 acting

5 operations · 4 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Portal
Portal
 Signup
Signup
 Login
Login

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: maileroo
name: Maileroo
description: Maileroo provides transactional and marketing email delivery via a developer-friendly REST API with high deliverability,
  SMTP relay support, email tracking, and SDKs for popular programming languages. Trusted by businesses of all sizes to handle
  millions of emails every month.
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/maileroo.png
tags:
- Email
- Email Delivery
- Marketing Email
- SMTP
- Transactional Email
url: https://raw.githubusercontent.com/api-evangelist/maileroo/refs/heads/main/apis.yml
created: '2025-02-06'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: maileroo:maileroo-emails-api
  name: Maileroo Emails API
  description: Send transactional and bulk emails
  humanURL: https://maileroo.com/email-for-developers
  baseURL: https://smtp.maileroo.com
  tags:
  - Emails
  properties:
  - type: OpenAPI
    url: openapi/maileroo-emails-api-openapi.yml
  - type: Documentation
    url: https://maileroo.com/docs/email-api/introduction/
  - type: GettingStarted
    url: https://maileroo.com/docs/introduction/
  - type: Reference
    url: https://maileroo.com/docs/email-api/send-basic-email/
  - type: SDKs
    url: https://maileroo.com/docs/email-api/libraries-and-sdks/
- aid: maileroo:maileroo-scheduled-api
  name: Maileroo Scheduled API
  description: Manage scheduled email deliveries
  humanURL: https://maileroo.com/email-for-developers
  baseURL: https://smtp.maileroo.com
  tags:
  - Scheduled
  properties:
  - type: OpenAPI
    url: openapi/maileroo-scheduled-api-openapi.yml
  - type: Documentation
    url: https://maileroo.com/docs/email-api/introduction/
  - type: GettingStarted
    url: https://maileroo.com/docs/introduction/
  - type: Reference
    url: https://maileroo.com/docs/email-api/send-basic-email/
  - type: SDKs
    url: https://maileroo.com/docs/email-api/libraries-and-sdks/
common:
- type: AgenticAccess
  url: agentic-access/maileroo-agentic-access.yml
- type: DomainSecurity
  url: security/maileroo-domain-security.yml
- type: Authentication
  url: authentication/maileroo-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/maileroo
- type: Portal
  url: https://maileroo.com/email-for-developers
- type: Documentation
  url: https://maileroo.com/docs/
- type: Signup
  url: https://app.maileroo.com/register
- type: Login
  url: https://app.maileroo.com/login
- type: GitHubOrganization
  url: https://github.com/maileroo
- type: Pricing
  url: https://maileroo.com/pricing
- type: LlmsText
  url: https://maileroo.com/llms.txt
- type: Blog
  url: https://maileroo.com/blog/feed
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com