MailerLite

MailerLite is an email marketing and automation platform used by creators, e-commerce sellers and small businesses to build lists, send campaigns and run behavioural automations. The current REST API at connect.mailerlite.com exposes subscribers, groups, segments, custom fields, campaigns, automations, forms, webhooks, batching, and a full e-commerce surface (shops, products, categories, customers, orders, carts) that drives abandoned-cart and post-purchase automations. Authentication is a bearer API key minted in the dashboard; responses are cursor-paginated and the API version can be pinned with an X-Version date header. Alongside the REST API, MailerLite ships six official SDKs, a first-party Go CLI with an interactive TUI, a published Agent Skill, and a hosted OAuth-protected MCP server at mcp.mailerlite.com exposing roughly 76 tools to AI assistants. A legacy Classic API v2 still serves older 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, Subscribers, and Campaigns.

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, CLI, documentation, API reference, getting-started guide, and 45 more developer resources.

🌐 Visit website 📡 Source on GitHub

77.6/100 exemplar ▬ flat Agent 45/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0

AccessFreemiumSelf serve⚡ Free to try

9 APIs 2 MCP Servers 1 Agent Skills

Email MarketingAutomationNewslettersSubscribersCampaignsWebhookE-CommerceSegmentationTransactional EmailMCP

Kin Score

Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0

Composite quality — 77.6/100 · exemplar

Contract Quality 13.2 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 17.0 / 17

Operational Transparency 6.4 / 11

Contract Governance 4.3 / 10

Discoverability 7.9 / 9

Regulatory Posture 9.0 / 15

Agent readiness — 45/100 · 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 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 3 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

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.

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/.

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. Corrected 2026-08-13: the Classic...

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 10

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

API Collection

OPEN COLLECTION

MailerLite Automations API

OPEN COLLECTION

MailerLite Automations Campaigns API

OPEN COLLECTION

MailerLite Automations Fields API

OPEN COLLECTION

MailerLite Automations Forms API

OPEN COLLECTION

MailerLite Automations Groups API

OPEN COLLECTION

MailerLite Automations Segments API

OPEN COLLECTION

MailerLite Automations Subscribers API

OPEN COLLECTION

MailerLite Automations Webhooks API

OPEN COLLECTION

MailerLite API

OPEN COLLECTION

Scroll for all 10

MCP Servers 2

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

MailerLite MCP Server

MCP SERVER

MCP Server Manifest

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

2 limits

RATE LIMITS

FinOps 1

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

Get Started 5

Portal, sign-up, and the first successful call

Portal

DeveloperPortal

GettingStarted

SignUp

Login

Documentation 3

Reference material describing how the API behaves

AsyncAPI

AsyncAPI

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 7

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

MCPServer

MCPServer

AgentSkill

AgentSkill

LLMsTxt

WellKnown

Scroll for all 7

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Lifecycle

Webhooks

Conformance

Build 5

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

ToolCrosswalk

Packages

SDKs

CLI

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

TrustCenter

TrustCenter

Compliance

Compliance

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Support

Support

Commercial 5

Pricing, plans, and the legal terms of use

Pricing

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 9

Properties that don't map to a standard resource type

ContentSignal

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Overlay

Scroll for all 9

Source (apis.yml)

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 used by creators, e-commerce sellers and small businesses
  to build lists, send campaigns and run behavioural automations. The current REST API at connect.mailerlite.com exposes subscribers,
  groups, segments, custom fields, campaigns, automations, forms, webhooks, batching, and a full e-commerce surface (shops,
  products, categories, customers, orders, carts) that drives abandoned-cart and post-purchase automations. Authentication
  is a bearer API key minted in the dashboard; responses are cursor-paginated and the API version can be pinned with an X-Version
  date header. Alongside the REST API, MailerLite ships six official SDKs, a first-party Go CLI with an interactive TUI, a
  published Agent Skill, and a hosted OAuth-protected MCP server at mcp.mailerlite.com exposing roughly 76 tools to AI assistants.
  A legacy Classic API v2 still serves older 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
- Campaigns
- Webhook
- E-Commerce
- Segmentation
- Transactional Email
- MCP
tags_raw:
- Email Marketing
- Automation
- Newsletters
- Subscribers
- Campaigns
- Webhooks
- E-commerce
- Segmentation
- Transactional Email
- MCP
created: '2026-05-08'
modified: '2026-08-13'
specificationVersion: '0.23'
apis:
- aid: mailerlite:mailerlite-classic-api
  name: MailerLite Classic API (Legacy)
  humanURL: https://developers-classic.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. Corrected 2026-08-13: the Classic documentation host is developers-classic.mailerlite.com
    (per the Classic API link in the current developer portal nav); the previously recorded classic.developers.mailerlite.com
    does not resolve.'
  properties:
  - type: Documentation
    url: https://developers-classic.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:
  - Group
  tags_raw:
  - 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:
  - Webhook
  tags_raw:
  - 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: MailerLite MCP Server
  type: MCPServer
  url: https://mcp.mailerlite.com/mcp
- name: MCP Server Manifest
  type: MCPServer
  url: mcp/mailerlite-mcp.yml
- name: MCP to REST Tool Crosswalk
  type: ToolCrosswalk
  url: mcp/mailerlite-tool-crosswalk.yml
- name: Agent Skills (published by MailerLite)
  type: AgentSkill
  url: https://github.com/mailerlite/mailerlite-skills
- name: Agent Skills Index
  type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/mailerlite-llms.txt
- type: Packages
  url: packages/mailerlite-packages.yml
- type: SDKs
  url: packages/mailerlite-packages.yml
- type: CLI
  url: cli/mailerlite-cli.yml
- type: Conventions
  url: conventions/mailerlite-conventions.yml
- type: ErrorCatalog
  url: errors/mailerlite-problem-types.yml
- type: DataModel
  url: data-model/mailerlite-data-model.yml
- type: Lifecycle
  url: lifecycle/mailerlite-lifecycle.yml
- name: MailerLite Status
  type: StatusPage
  url: https://status.mailerlite.com/
- type: AsyncAPI
  url: asyncapi/mailerlite-webhooks-asyncapi.yml
- name: Webhooks
  type: Webhooks
  url: https://developers.mailerlite.com/api/webhooks
- type: WellKnown
  url: well-known/mailerlite-well-known.yml
- name: Content Signals Policy (robots.txt)
  type: ContentSignal
  url: https://www.mailerlite.com/robots.txt
- type: VulnerabilityDisclosure
  url: security/mailerlite-vulnerability-disclosure.yml
- name: Responsible Disclosure Program
  type: Security
  url: https://www.mailerlite.com/legal/responsible-disclosure-program
- type: TrustCenter
  url: security/mailerlite-trust-center.yml
- name: Security and Compliance
  type: Compliance
  url: https://www.mailerlite.com/trust-page
- type: Conformance
  url: conformance/mailerlite-conformance.yml
- name: Subscribers API Overlay
  type: Overlay
  url: overlays/mailerlite-subscribers-api-overlay.yaml
- name: Groups API Overlay
  type: Overlay
  url: overlays/mailerlite-groups-api-overlay.yaml
- name: Segments API Overlay
  type: Overlay
  url: overlays/mailerlite-segments-api-overlay.yaml
- name: Fields API Overlay
  type: Overlay
  url: overlays/mailerlite-fields-api-overlay.yaml
- name: Campaigns API Overlay
  type: Overlay
  url: overlays/mailerlite-campaigns-api-overlay.yaml
- name: Automations API Overlay
  type: Overlay
  url: overlays/mailerlite-automations-api-overlay.yaml
- name: Forms API Overlay
  type: Overlay
  url: overlays/mailerlite-forms-api-overlay.yaml
- name: Webhooks API Overlay
  type: Overlay
  url: overlays/mailerlite-webhooks-api-overlay.yaml
- type: DeveloperPortal
  url: https://developers.mailerlite.com/
- type: Documentation
  url: https://developers.mailerlite.com/
- type: APIReference
  url: https://developers.mailerlite.com/api/subscribers
- type: GettingStarted
  url: https://developers.mailerlite.com/getting-started
- type: Support
  url: https://www.mailerlite.com/help
- type: Blog
  url: https://www.mailerlite.com/blog
- type: SignUp
  url: https://www.mailerlite.com/signup
- type: Login
  url: https://dashboard.mailerlite.com/login
- type: TermsOfService
  url: https://www.mailerlite.com/legal/terms-of-service
- type: PrivacyPolicy
  url: https://www.mailerlite.com/legal/privacy-policy
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
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 25
  pass: local-v1

MailerLite

APIs 9

Open Collections 10

MCP Servers 2

Agent Skills 1

Pricing Plans 1

Rate Limits 1

FinOps 1

Event Specifications 1

Spectral Rules 1

Security Posture 4

Agentic Access 1

Get Started 5

Documentation 3

Agent Surfaces 7

Design & Contract 6

Build 5

Access & Security 6

Operate 3

Commercial 5

Company 3

Other 9

Source (apis.yml)