# Campaign Monitor

**Canonical:** https://apis.io/providers/campaignmonitor/  
**Website:** https://www.campaignmonitor.com/  
**APIs profiled:** 1

Campaign Monitor, a Marigold brand, is an email marketing platform for marketers and agencies. Its REST API — served under the original createsend name at api.createsend.com/api/v3.3 — manages clients, subscriber lists, subscribers and custom fields, segments, campaigns, HTML templates, automated journeys, authenticated sending domains and transactional email, and returns per-recipient reporting for opens, clicks, bounces, unsubscribes and spam complaints. Authentication is OAuth 2.0 with twelve coarse permissions, or an API key over HTTP Basic. Per-list webhooks push Subscribe, Update and Deactivate events. Campaign Monitor publishes no OpenAPI, no AsyncAPI and no MCP server; the contract is HTML reference documentation plus seven official client libraries.

## Kin Score — 72.9 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 72.9).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 56.3 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 76.3 |
| Developer Ergonomics | 57.1 |
| Commercial Clarity | 100.0 |
| Access Clarity | 100.0 |

Regulatory layer — **Telecommunications**: 73.6 (matched via tags).

## Agent readiness — 38.0 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium (free trial) — onboarding: unknown, pricing: freemium, trial: yes (confidence: medium).

## APIs (1)

- **Campaign Monitor API** — REST API for managing email campaigns, subscriber lists, transactional emails, segments, journeys, templates, and campaign performance analytics.

## MCP servers (1)

- **Campaign Monitor MCP Server**

## Security (4)

- **Campaignmonitor Authentication** — oauth2/http · 2 schemes
- **Campaignmonitor Domain Security** — TLSv1.3 · DMARC
- **Campaignmonitor Vulnerability Disclosure** — Bugcrowd · security.txt · contact published
- **Campaignmonitor Trust Center** — SOC 2, GDPR

## Plans (1)

- **Campaignmonitor Plans Pricing**

## Tags

Email Marketing, Campaigns, Subscribers, Transactional Email, Segments, Newsletters, Automation, Marketing Automation, Webhook, Email Deliverability, Marketing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/campaignmonitor/). Scores are computed from the provider's own public artifacts under a published rubric.