Campaign Monitor website screenshot

Campaign Monitor

Email marketing platform with a REST API for managing campaigns, subscriber lists, transactional emails, segments, and accessing campaign performance analytics.

Campaign Monitor publishes 1 API on the APIs.io network. Tagged areas include Email Marketing, Campaigns, Subscribers, Transactional Email, and Segments.

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

Campaign Monitor’s developer surface includes documentation, engineering blog, pricing, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
36.5/100 thin ▬ flat Agent 19/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumFree trial
1 APIs
Email MarketingCampaignsSubscribersTransactional EmailSegmentsNewslettersAutomation

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 36.5/100 · thin
Contract Quality 11.3 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 11.6 / 20
Operational Transparency 5.5 / 13
Governance 0.0 / 12
Discoverability 5.9 / 10
Agent readiness — 19/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 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/campaignmonitor: 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 1

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

Campaign Monitor API

REST API for managing email campaigns, subscriber lists, transactional emails, segments, journeys, templates, and campaign performance analytics.

Pricing Plans 1

Published pricing tiers and plan structures.

Campaignmonitor Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Campaignmonitor Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Campaignmonitor Finops

FINOPS

Semantic Vocabularies 1

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

Campaignmonitor Context

18 classes · 1 properties

JSON-LD

Security Posture 3

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

Campaignmonitor Domain Security

TLSv1.3 · DMARC

SECURITY

Campaignmonitor Vulnerability Disclosure

Bugcrowd · security.txt · contact published

SECURITY

Campaignmonitor Trust Center

SOC 2, GDPR

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLDContext
JSONLDContext

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 3

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 VulnerabilityDisclosure
VulnerabilityDisclosure
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 4

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog
 BlogPosts
BlogPosts

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: campaignmonitor
name: Campaign Monitor
description: Email marketing platform with a REST API for managing campaigns, subscriber lists, transactional emails, segments,
  and accessing campaign performance analytics.
type: Index
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/campaignmonitor.png
url: https://raw.githubusercontent.com/api-evangelist/campaignmonitor/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
tags:
- Email Marketing
- Campaigns
- Subscribers
- Transactional Email
- Segments
- Newsletters
- Automation
apis:
- aid: campaignmonitor:campaign-monitor-api
  name: Campaign Monitor API
  description: REST API for managing email campaigns, subscriber lists, transactional emails, segments, journeys, templates,
    and campaign performance analytics.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.campaignmonitor.com/api/
  baseURL: https://api.createsend.com/api/v3.3/
  tags:
  - Email Marketing
  - Campaigns
  - Subscribers
  - Transactional Email
  - Segments
  - Webhooks
  properties:
  - type: Documentation
    url: https://www.campaignmonitor.com/api/v3-3/getting-started/
  - type: OpenAPI
    url: https://www.campaignmonitor.com/api/
  contact:
  - FN: Campaign Monitor Support
    url: https://help.campaignmonitor.com/
common:
- type: TrustCenter
  url: security/campaignmonitor-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/campaignmonitor-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/campaignmonitor-domain-security.yml
- type: Website
  url: https://www.campaignmonitor.com/
- type: Documentation
  url: https://www.campaignmonitor.com/api/
- type: GitHubOrg
  url: https://github.com/campaignmonitor
- type: LinkedIn
  url: https://www.linkedin.com/company/campaign-monitor
- type: Blog
  url: https://www.campaignmonitor.com/blog/
- type: Pricing
  url: https://www.campaignmonitor.com/pricing/
- type: StatusPage
  url: https://status.campaignmonitor.com/
- type: X
  url: https://x.com/campaignmonitor
- type: Plans
  url: plans/campaignmonitor-plans-pricing.yml
- type: RateLimits
  url: rate-limits/campaignmonitor-rate-limits.yml
- type: FinOps
  url: finops/campaignmonitor-finops.yml
- type: BlogPosts
  url: blogs/blogs.json
- type: JSONLDContext
  url: json-ld/campaignmonitor-context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com