Moosend

Moosend is an email marketing and automation platform with a REST API for managing mailing lists, campaigns, subscribers, automations, and tracking email performance metrics. The API uses HTTPS with API key authentication and provides programmatic access to email lists, subscriber management, campaign creation and scheduling, audience segmentation, transactional emails, and real-time reporting.

Moosend publishes 4 APIs on the APIs.io network, including Campaigns API, Mailing Lists API, Segments API, and 1 more. Tagged areas include Email Marketing, Marketing Automation, Campaigns, Mailing Lists, and Subscribers.

The Moosend catalog on APIs.io includes 1 JSON-LD context.

Moosend’s developer surface includes authentication, documentation, API reference, support, signup flow, engineering blog, pricing, and 31 more developer resources.

🌐 Visit website 📡 Source on GitHub

65.8/100 strong ▬ flat Agent 35/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumFree trial

1 APIs

Email Marketing Marketing Automation Campaigns Mailing Lists Subscribers Transactional Email SMTP Segmentation Analytics Email Newsletters Landing PagesWebsite TrackingMarketing

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 65.8/100 · strong

Contract Quality 11.3 / 19

Developer Ergonomics 7.6 / 15

Access Clarity 15.0 / 15

Operational Transparency 5.9 / 10

Contract Governance 0.4 / 9

Discoverability 5.7 / 8

Regulatory Posture 8.5 / 15

Create-or-Update Ergonomics 1.1 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/. 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/moosend: 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 →

APIs 4

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

Moosend Campaigns API

The Campaigns API from Moosend — 19 operation(s) for campaigns.

Moosend Mailing Lists API

The Mailing Lists API from Moosend — 9 operation(s) for mailing lists.

Moosend Segments API

The Segments API from Moosend — 8 operation(s) for segments.

Moosend Subscribers API

The Subscribers API from Moosend — 11 operation(s) for subscribers.

Open Collections 1

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

Moosend API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Moosend Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Moosend Rate Limits

10 limits

RATE LIMITS

FinOps 1

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

Moosend Finops

FINOPS

Semantic Vocabularies 1

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

Moosend Context

20 classes · 0 properties

JSON-LD

Security Posture 4

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

Moosend Authentication

apiKey · 1 scheme

SECURITY

Moosend Domain Security

TLSv1.3 · DMARC

SECURITY

Moosend Vulnerability Disclosure

Bugcrowd

SECURITY

Moosend Trust Center

ISO 27001, Certified Senders Alliance (CSA), GDPR, NIST SP 800-171, PCI DSS

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

AgentSkill

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

JSONLD

Conventions

ErrorCatalog

Lifecycle

DataModel

Components

Conformance

Scroll for all 7

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 6

Authentication, authorization, and security posture

Authentication

TrustCenter

DomainSecurity

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 4

Status, limits, changes, and where to get help

HelpCenter

Support

StatusPage

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

TermsOfService

PrivacyPolicy

Pricing

Plans

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: moosend
name: Moosend
description: Moosend is an email marketing and automation platform with a REST API for managing mailing lists, campaigns,
  subscribers, automations, and tracking email performance metrics. The API uses HTTPS with API key authentication and provides
  programmatic access to email lists, subscriber management, campaign creation and scheduling, audience segmentation, transactional
  emails, and real-time reporting.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: true
  try_now: false
  public: false
  label: Freemium (free trial)
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/moosend.png
url: https://raw.githubusercontent.com/api-evangelist/moosend/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-08-13'
specificationVersion: '0.23'
tags:
- Email Marketing
- Marketing Automation
- Campaigns
- Mailing Lists
- Subscribers
- Transactional Email
- SMTP
- Segmentation
- Analytics
- Email
- Newsletters
- Landing Pages
- Website Tracking
- Marketing
apis:
- aid: moosend:moosend-campaigns-api
  name: Moosend Campaigns API
  description: The Campaigns API from Moosend — 19 operation(s) for campaigns.
  humanURL: https://moosend.com/
  baseURL: https://api.moosend.com/v3
  tags:
  - Campaigns
  properties:
  - type: OpenAPI
    url: openapi/moosend-campaigns-api-openapi.yml
  - type: Documentation
    url: https://docs.moosend.com/api-documentation?lang=en_US
  - type: APIReference
    url: https://moosendapp.docs.apiary.io/
  - type: ErrorCatalog
    url: errors/moosend-problem-types.yml
  - type: DataModel
    url: data-model/moosend-data-model.yml
- aid: moosend:moosend-mailing-lists-api
  name: Moosend Mailing Lists API
  description: The Mailing Lists API from Moosend — 9 operation(s) for mailing lists.
  humanURL: https://moosend.com/
  baseURL: https://api.moosend.com/v3
  tags:
  - Mailing Lists
  properties:
  - type: OpenAPI
    url: openapi/moosend-mailing-lists-api-openapi.yml
  - type: Documentation
    url: https://docs.moosend.com/api-documentation?lang=en_US
  - type: APIReference
    url: https://moosendapp.docs.apiary.io/
  - type: ErrorCatalog
    url: errors/moosend-problem-types.yml
  - type: DataModel
    url: data-model/moosend-data-model.yml
- aid: moosend:moosend-segments-api
  name: Moosend Segments API
  description: The Segments API from Moosend — 8 operation(s) for segments.
  humanURL: https://moosend.com/
  baseURL: https://api.moosend.com/v3
  tags:
  - Segments
  properties:
  - type: OpenAPI
    url: openapi/moosend-segments-api-openapi.yml
  - type: Documentation
    url: https://docs.moosend.com/api-documentation?lang=en_US
  - type: APIReference
    url: https://moosendapp.docs.apiary.io/
  - type: ErrorCatalog
    url: errors/moosend-problem-types.yml
  - type: DataModel
    url: data-model/moosend-data-model.yml
- aid: moosend:moosend-subscribers-api
  name: Moosend Subscribers API
  description: The Subscribers API from Moosend — 11 operation(s) for subscribers.
  humanURL: https://moosend.com/
  baseURL: https://api.moosend.com/v3
  tags:
  - Subscribers
  properties:
  - type: OpenAPI
    url: openapi/moosend-subscribers-api-openapi.yml
  - type: Documentation
    url: https://docs.moosend.com/api-documentation?lang=en_US
  - type: APIReference
    url: https://moosendapp.docs.apiary.io/
  - type: ErrorCatalog
    url: errors/moosend-problem-types.yml
  - type: DataModel
    url: data-model/moosend-data-model.yml
common:
- type: Authentication
  url: authentication/moosend-authentication.yml
- type: TrustCenter
  url: security/moosend-trust-center.yml
- type: DomainSecurity
  url: security/moosend-domain-security.yml
- type: Website
  url: https://moosend.com/
- type: Documentation
  url: https://docs.moosend.com/api-documentation?lang=en_US
- type: DeveloperPortal
  url: https://moosend.com/api/
- type: APIReference
  url: https://moosendapp.docs.apiary.io/
- type: HelpCenter
  url: https://docs.moosend.com/user-guide?lang=en_US
- type: Support
  url: https://moosend.com/contact-us/support/
- type: SignUp
  url: https://identity.moosend.com/register/
- type: Login
  url: https://app.moosend.com/login
- type: TermsOfService
  url: https://moosend.com/terms/
- type: PrivacyPolicy
  url: https://moosend.com/privacy-policy/
- type: Integrations
  url: https://moosend.com/integrations/
- type: GitHubOrganization
  url: https://github.com/moosend
- type: LinkedIn
  url: https://www.linkedin.com/company/moosend
- type: Blog
  url: https://moosend.com/blog/
- type: Pricing
  url: https://moosend.com/pricing/
- type: StatusPage
  url: https://moosend.statuspage.io
- type: X
  url: https://x.com/moosend
- type: Plans
  url: plans/moosend-plans-pricing.yml
- type: RateLimits
  url: rate-limits/moosend-rate-limits.yml
- type: FinOps
  url: finops/moosend-finops.yml
- type: JSONLD
  url: json-ld/moosend-context.jsonld
- type: Packages
  url: packages/moosend-packages.yml
- type: SDKs
  url: packages/moosend-packages.yml
- type: LLMsTxt
  url: llms/moosend-llms.txt
- type: X-MCPServerCandidate
  url: mcp/moosend-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml
- type: Conventions
  url: conventions/moosend-conventions.yml
- type: ErrorCatalog
  url: errors/moosend-problem-types.yml
- type: Lifecycle
  url: lifecycle/moosend-lifecycle.yml
- type: DataModel
  url: data-model/moosend-data-model.yml
- type: Components
  url: components/moosend-components.yml
- type: Conformance
  url: conformance/moosend-conformance.yml
- type: Compliance
  url: https://moosend.com/trust/compliance/
- type: VulnerabilityDisclosure
  url: security/moosend-vulnerability-disclosure.yml
- type: Security
  url: https://moosend.com/privacy-policy/disclosure/
- type: Overlay
  url: overlays/moosend-openapi-overlay.yaml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 21
  pass: local-v1
  contract_discovery: 'STEP 0b found Moosend''s real machine-readable contract at https://moosendapp.docs.apiary.io/api-description-document
    — an API Blueprint 1A document (270KB, 49 documented operations, HOST https://api.moosend.com/v3) that the previous round
    had catalogued only as an HTML docs link. Saved verbatim to openapi/_original/ and transcribed to OpenAPI 3.1.0 at openapi/moosend-openapi.yml
    (47 path+method operations after merging two duplicate definitions). Ownership confirmed: the blueprint''s own HOST declaration,
    title and example URLs all name api.moosend.com.'

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