MailerLite website screenshot

MailerLite

MailerLite is an email marketing and automation platform. The current REST API exposes subscribers, groups, segments, fields, campaigns, automations, forms, webhooks, and more, with a deprecated Classic API still serving legacy accounts.

MailerLite publishes 8 APIs on the APIs.io network, including Automations API, Campaigns API, Fields API, and 5 more. Tagged areas include Email Marketing, Automation, Newsletters, and Subscribers.

The MailerLite catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

MailerLite’s developer surface includes authentication, developer portal, pricing, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub
46.5/100 developing ▬ flat Agent 51/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumSelf serve⚡ Free to try
9 APIs 1 MCP Servers 1 Agent Skills
Email MarketingAutomationNewslettersSubscribers

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 46.5/100 · developing
Contract Quality 15.9 / 25
Developer Ergonomics 5.7 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 3.4 / 13
Governance 5.0 / 12
Discoverability 6.5 / 10
Agent readiness — 51/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 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
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/mailerlite: 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 9

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

MailerLite Classic API (Legacy)

The MailerLite Classic API serves legacy MailerLite Classic accounts. New integrations should target the current API at connect.mailerlite.com.

MailerLite Automations API

The Automations API from MailerLite — 1 operation(s) for automations.

MailerLite Campaigns API

The Campaigns API from MailerLite — 2 operation(s) for campaigns.

MailerLite Fields API

The Fields API from MailerLite — 1 operation(s) for fields.

MailerLite Forms API

The Forms API from MailerLite — 1 operation(s) for forms.

MailerLite Groups API

The Groups API from MailerLite — 2 operation(s) for groups.

MailerLite Segments API

The Segments API from MailerLite — 1 operation(s) for segments.

MailerLite Subscribers API

The Subscribers API from MailerLite — 4 operation(s) for subscribers.

MailerLite Webhooks API

The Webhooks API from MailerLite — 2 operation(s) for webhooks.

Scroll for all 9

Open Collections 1

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

MailerLite API

OPEN COLLECTION

MCP Servers 1

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

MCP Server

MCP SERVER

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

MailerLite

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Mailerlite Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mailerlite Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

Mailerlite Finops

FINOPS

Event Specifications 1

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

MailerLite Webhooks

AsyncAPI 2.6 description of MailerLite's outbound webhook surface. MailerLite delivers event notifications by issuing HTTP POST requests with a JSON body to a callback URL the c...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

MailerLite API Rules

7 rules · 1 errors 6 warnings

SPECTRAL

Security Posture 2

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

Mailerlite Authentication

http · 1 scheme

SECURITY

Mailerlite Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Mailerlite Agentic Access

21 operations · 10 acting

21 operations · 10 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal
Portal

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 MCPServer
MCPServer
 AgentSkills
AgentSkills

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

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: mailerlite
url: https://raw.githubusercontent.com/api-evangelist/mailerlite/refs/heads/main/apis.yml
name: MailerLite
kind: company
description: MailerLite is an email marketing and automation platform. The current REST API exposes subscribers, groups, segments,
  fields, campaigns, automations, forms, webhooks, and more, with a deprecated Classic API still serving legacy accounts.
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/mailerlite.png
tags:
- Email Marketing
- Automation
- Newsletters
- Subscribers
created: '2026-05-08'
modified: '2026-05-30'
specificationVersion: '0.19'
apis:
- aid: mailerlite:mailerlite-classic-api
  name: MailerLite Classic API (Legacy)
  humanURL: https://classic.developers.mailerlite.com/
  baseURL: https://api.mailerlite.com/api/v2
  tags:
  - Email Marketing
  - Legacy
  - Deprecated
  description: The MailerLite Classic API serves legacy MailerLite Classic accounts. New integrations should target the current
    API at connect.mailerlite.com.
  properties:
  - type: Documentation
    url: https://classic.developers.mailerlite.com/
- aid: mailerlite:mailerlite-automations-api
  name: MailerLite Automations API
  description: The Automations API from MailerLite — 1 operation(s) for automations.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Automations
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-automations-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-campaigns-api
  name: MailerLite Campaigns API
  description: The Campaigns API from MailerLite — 2 operation(s) for campaigns.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-campaigns-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-fields-api
  name: MailerLite Fields API
  description: The Fields API from MailerLite — 1 operation(s) for fields.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Fields
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-fields-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-forms-api
  name: MailerLite Forms API
  description: The Forms API from MailerLite — 1 operation(s) for forms.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Forms
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-forms-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-groups-api
  name: MailerLite Groups API
  description: The Groups API from MailerLite — 2 operation(s) for groups.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Groups
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-groups-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-segments-api
  name: MailerLite Segments API
  description: The Segments API from MailerLite — 1 operation(s) for segments.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Segments
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-segments-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-subscribers-api
  name: MailerLite Subscribers API
  description: The Subscribers API from MailerLite — 4 operation(s) for subscribers.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Subscribers
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-subscribers-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
- aid: mailerlite:mailerlite-webhooks-api
  name: MailerLite Webhooks API
  description: The Webhooks API from MailerLite — 2 operation(s) for webhooks.
  humanURL: https://developers.mailerlite.com/docs/
  baseURL: https://connect.mailerlite.com/api
  tags:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/mailerlite-webhooks-api-openapi.yml
  - type: Documentation
    url: https://developers.mailerlite.com/docs/
  - type: Authentication
    url: https://developers.mailerlite.com/docs/#authentication
  - type: AsyncAPI
    url: asyncapi/mailerlite-webhooks-asyncapi.yml
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-php
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-nodejs
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-python
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-go
  - type: SDKs
    url: https://github.com/mailerlite/mailerlite-ruby
common:
- type: AgenticAccess
  url: agentic-access/mailerlite-agentic-access.yml
- type: DomainSecurity
  url: security/mailerlite-domain-security.yml
- type: Authentication
  url: authentication/mailerlite-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/mailerlite-international
- type: Website
  url: https://www.mailerlite.com/
- type: Portal
  url: https://developers.mailerlite.com/
- type: GitHubOrganization
  url: https://github.com/mailerlite
- type: Pricing
  url: https://www.mailerlite.com/pricing
- type: Plans
  url: plans/mailerlite-plans-pricing.yml
- type: RateLimits
  url: rate-limits/mailerlite-rate-limits.yml
- type: FinOps
  url: finops/mailerlite-finops.yml
- type: Integrations
  url: https://www.mailerlite.com/integrations
- name: MCP Server
  url: https://github.com/mailerlite/canny-mcp-server
  type: MCPServer
- name: Agent Skills
  url: https://github.com/mailerlite/mailerlite-skills
  type: AgentSkills
integrations:
- name: Stripe
- name: Zapier
- name: Shopify
- name: WordPress
- name: WooCommerce
- name: Tidio All-in-one customer experience platform. Partner
- name: 500apps App Integration Software 3-rd party
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com