# Kit

**Canonical:** https://apis.io/providers/kit/  
**Website:** https://kit.com/  
**APIs profiled:** 4

Kit (formerly ConvertKit) is an email marketing and creator platform. The Kit API V4 exposes subscribers, broadcasts, sequences, tags, custom fields, forms, purchases, and webhooks. V3 is deprecated.

## Kin Score — 43.6 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 43.6).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 66.4 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 47.4 |
| Access Clarity | 47.4 |

Regulatory layer — **Telecommunications**: 55.6 (matched via tags).

## Agent readiness — 30.3 (agent-aware)

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

## Access

Paid · Self-serve signup — onboarding: self-serve, pricing: paid, trial: no (confidence: high).

## APIs (4)

- **Kit API V3 (Deprecated)** — The legacy ConvertKit V3 API is deprecated and slated for discontinuation; new integrations should target V4.
- **Kit Account API** — Account, creator profile, and account-level statistics
- **Kit Broadcasts API** — One-off email broadcasts
- **Kit Subscribers API** — Subscriber records and lifecycle

## Agentic access (1)

- **Kit Agentic Access** — 9 operations · 3 acting

## Security (4)

- **Kit Authentication** — apiKey/oauth2 · 2 schemes
- **Kit Domain Security** — TLSv1.3 · HSTS · DMARC
- **Kit Vulnerability Disclosure** — Bugcrowd
- **Kit Trust Center** — SOC 2, ISO 27001, ISO 27018, GDPR

## Plans (1)

- **Kit Plans Pricing**

## Tags

Email Marketing, Creator Economy, Newsletters, Automation, Subscribers

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