# Plain

**Canonical:** https://apis.io/providers/plain-support/  
**Website:** https://www.plain.com  
**APIs profiled:** 1

Plain is an API-first customer support platform built around a single GraphQL API. Everything in the product - customers, threads, timeline entries, messages, labels, tiers, and webhooks - is exposed through the same GraphQL endpoint the Plain UI consumes, letting teams build support into their own products with threads, customer context, and a unified timeline.

## Kin Score — 39.5 / 100 (developing)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 39.5).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 62.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 35.0 (agent-ready)

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

## Access

Freemium (free trial) · Open access — onboarding: open, pricing: freemium, trial: yes (confidence: high).

## APIs (1)

- **Plain GraphQL API** — The GraphQL API from Plain — 1 operation(s) for graphql.

## Agentic access (1)

- **Plain Support Agentic Access** — 1 operation · 1 acting

## Security (2)

- **Plain Support Authentication** — http · 1 scheme
- **Plain Support Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Plain Support Plans Pricing**

## Tags

Customer-Support, Help Desk, GraphQL, Threads, Customer Communication, API-First

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