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 API contracts indexed 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 and 1 Spectral governance ruleset.

Moosend’s developer surface includes authentication, documentation, API reference, support, signup flow, engineering blog, pricing, and 32 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

63.7/100 strong ▬ flat Agent 34/100 agent ready Front door AI 4/6 moderate Heartbeat 70/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 4 Agent Skills

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

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Marketing Management

BC-400

CampaignsSubscribers

POST /campaigns/create.{Format} POST /campaigns/{CampaignID}/send.{Format} POST /subscribers/{MailingListID}/subscribe.{Format} POST /subscribers/{MailingListID}/unsubscribe.{Format}

Customer Relationship Management

BC-420

Segments

POST /lists/{MailingListID}/segments/{SegmentID}/criteria/add.{Format}

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 63.7/100 · strong

Contract Quality 10.3 / 19

Developer Ergonomics 7.6 / 15

Access Clarity 15.0 / 15

Operational Transparency 5.9 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.1 / 15

Create-or-Update Ergonomics 1.1 / 10

Agent readiness — 34/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 55.0 — up to +11.3 composite points
Developer Ergonomics scores 50.6 — up to +9.9 composite points
Contract Governance scores 18.2 — up to +9.8 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/moosend/apis.yml: open an issue on github.com/api-evangelist/moosend to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

SMTP

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

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

Agent Skills 4

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

Create, test and send a Moosend campaign

AGENT SKILL

Grow a Moosend mailing list

AGENT SKILL

Report on Moosend campaign performance

AGENT SKILL

Segment a Moosend audience

AGENT SKILL

Moosend API pricing

Prices published by Moosend, read 2026-10-28 from moosend.com/pricing/.

Plan	Price
Pro	Per month Includes: Unlimited Email Campaigns / Sents, Email Marketing, Automation, Landing Pages, Subscription Forms, S
Moosend+	Get Moosend+ Includes: All Pro features plus selected add-ons
Enterprise	Get a quote Includes: All features, Account Manager, Priority Support, SSO & SAML
Credits - 350,000 Email credits	$350 Includes: Unlimited Subscribers, SMTP Server, Reporting & Analytics
Credits - 500,000 Email credits	$500
Credits - 750,000 Email credits	$750
Credits - 1,000,000 Email credits	$1000

Plan details, limits and sources →

Billed by: 350,000 email credits · FinOps profile →

Pricing Plans 1

Published pricing tiers and plan structures.

Moosend Plans Pricing

7 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Moosend Rate Limits

10 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Moosend

SLA

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

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Moosend API Rules

55 rules · 51 errors 3 warnings 1 info

SPECTRAL

OpenAPI Overlays 1

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.

Moosend Openapi Overlay

11 actions · update · moosend-openapi.yml

DERIVED

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 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  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: CapabilityMap
  url: capabilities/moosend-capability-edges.yml
  name: Moosend Business Capability Map
- 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.'

Moosend API — frequently asked questions

Does Moosend have an API?

Yes. APIs.io lists 4 APIs from Moosend, including Moosend Campaigns API, Moosend Mailing Lists API and Moosend Segments API, and 1 more.

Is there an OpenAPI specification for the Moosend API?

Yes. APIs.io indexes 4 OpenAPI specifications for Moosend, each linked for download from this page.

How do I authenticate with the Moosend API?

Moosend documents its authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Moosend Authentication.

How much does the Moosend API cost?

Moosend publishes its prices; its Pro plan is Per month as of 2026-10-28. APIs.io lists 7 pricing plans for Moosend, with each plan's price, limits and inclusions under Pricing on this page.

Is the Moosend API ready for AI agents?

Moosend has a Kin Score of 63.7 out of 100 (strong) and an Agent Readiness score of 34.3 (agent-ready), scored by API Evangelist on 2026-11-06.

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