# Kartra

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

Kartra is an all-in-one online business platform operated by Kartra, Inc. of Las Vegas, Nevada, that bundles landing pages and funnels, email marketing with automation sequences, checkouts and recurring billing, membership sites and courses, video hosting, calendars and booking, helpdesks, affiliate management and lead scoring into a single subscription. Its developer surface is three distinct things: an inbound API that is a single form-encoded POST endpoint at https://app.kartra.com/api driven by 29 documented `cmd` values and scoped to exactly one lead per call; an outbound API that POSTs 24 JSON lead and commerce events to URLs configured in the account; and an IPN system that POSTs six payment-lifecycle notifications as flat form variables. Kartra publishes no OpenAPI, no SDK in any language, no signed webhooks and no idempotency contract, and it returns HTTP 200 for every outcome including authentication failure — the numeric `type` field in the response body is the real error signal.

## Kin Score — 60.2 / 100 (strong)

Scored 2026-08-17 under rubric 0.11.0. Trend: flat (+0.0 from 60.2).

| Facet | Score |
|---|---|
| Discoverability | 87.0 |
| Contract Quality | 51.6 |
| Governance | 12.5 |
| Operational Transparency | 60.5 |
| Developer Ergonomics | 73.9 |
| Commercial Clarity | 84.2 |

Regulatory layer — **Payments**: 46.9 (matched via tags).

## Agent readiness — 52.7 (agent-ready)

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

## APIs (1)

- **Kartra API** — Kartra's inbound developer API. One endpoint, POST only, form-encoded, with the operation selected by `actions[].cmd`. Twenty-nine documented commands cover leads, tags, lists, ...

## MCP servers (1)

- **kartra-mcp.yml**

## Security (3)

- **Kartra Authentication** — apiKey · 3 schemes
- **Kartra Domain Security** — TLSv1.3 · DNSSEC · DMARC
- **Kartra Vulnerability Disclosure** — Hackerone

## Plans (1)

- **Kartra Plans Pricing**

## Tags

Company, Marketing Automation, Email Marketing, CRM, Contacts, E-Commerce, Payments, Subscriptions, Membership, Landing Pages, Webhooks, SaaS

---

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