# Testmail

**Canonical:** https://apis.io/providers/testmail-app/  
**Website:** https://testmail.app  
**APIs profiled:** 2

Testmail is an email testing API platform for developers and QA teams that provides programmable inboxes with unlimited email addresses via a namespace.tag routing scheme. It offers both a JSON REST API and a GraphQL API for instant, programmatic retrieval of test emails, supporting automated end-to-end email testing in development workflows and CI/CD pipelines. Key capabilities include wildcard tag searches, live queries, pagination, spam score testing via SpamAssassin, and attachment handling.

## Kin Score — 44.5 / 100 (developing)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 44.5).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 67.8 |
| Governance | 9.8 |
| Contract Governance | 9.8 |
| Operational Transparency | 36.8 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 50.0 |
| Access Clarity | 50.0 |

## Agent readiness — 30.6 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | verified |
| 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 |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

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

## APIs (2)

- **Testmail GraphQL API** — Full-featured GraphQL API for querying test emails from Testmail programmable inboxes. Supports advanced filtering, custom sorting, field selection, live queries, pagination, an...
- **Testmail Inbox API** — Retrieve test emails from programmable inboxes

## Agentic access (1)

- **Testmail App Agentic Access** — 2 operations · 1 acting

## Security (2)

- **Testmail App Authentication** — apiKey/http · 2 schemes
- **Testmail App Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Testmail App Plans Pricing**

## Tags

Email Testing, Developer Tools, API Testing, GraphQL, REST API, CI/CD, QA Automation, Programmable Inboxes

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