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 9 API contracts indexed on the APIs.io network, including Automations API, Campaigns API, Fields API, and 6 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 46 more developer resources.
What this lets a business do 2
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
What people ask MailerLite 8
The questions people put to an LLM, and the jobs they hand an agent, that MailerLite's APIs answer — each one linked to the operation that does it. Generated by API Evangelist
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Official SDKs on Package Registries | mixed | 25.4 | - | - |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
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.
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Open Collections 10
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
API Collection
OPEN COLLECTIONMailerLite Automations API
OPEN COLLECTIONMailerLite Automations Campaigns API
OPEN COLLECTIONMailerLite Automations Fields API
OPEN COLLECTIONMailerLite Automations Forms API
OPEN COLLECTIONMailerLite Automations Groups API
OPEN COLLECTIONMailerLite Automations Segments API
OPEN COLLECTIONMailerLite Automations Subscribers API
OPEN COLLECTIONMailerLite Automations Webhooks API
OPEN COLLECTIONMailerLite API
OPEN COLLECTIONScroll for all 10
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
MailerLite MCP Server
MCP SERVERAgent Skills 1
Packaged agent skills for driving this provider's APIs from an AI assistant.
MailerLite
AGENT SKILLPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Mailerlite Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Mailerlite Finops
FINOPSEvent 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...
ASYNCAPISpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
MailerLite — asyncapi rules
SPECTRALOpenAPI Overlays 16
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
Mailerlite Automations Api Overlay
GENERATEDMailerlite Campaigns Api Overlay
GENERATEDMailerlite Fields Api Overlay
GENERATEDMailerlite Fields Api Phrasing Overlay
GENERATEDMailerlite Forms Api Overlay
GENERATEDMailerlite Forms Api Phrasing Overlay
GENERATEDMailerlite Groups Api Overlay
GENERATEDMailerlite Groups Api Phrasing Overlay
GENERATEDMailerlite Segments Api Overlay
GENERATEDMailerlite Segments Api Phrasing Overlay
GENERATEDMailerlite Subscribers Api Overlay
GENERATEDMailerlite Webhooks Api Overlay
GENERATEDMailerlite Webhooks Api Phrasing Overlay
GENERATEDScroll for all 16
Security Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Mailerlite Trust Center
ISO/IEC 27001:2022, PCI DSS, GDPR, EU-U.S. Data Privacy Framework, Swiss-U.S. Data Privacy Framework, UK Extension to the EU-U.S. Data Privacy Framework
SECURITYAgentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 5
Portal, sign-up, and the first successful call
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 7
MCP servers, agent skills, and machine-readable catalogs
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Design & Contract 6
Pagination, idempotency, versioning, errors, and events
Build 5
SDKs, sample code, and the tooling you integrate with
Access & Security 6
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 10
Properties that don't map to a standard resource type
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Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.