# Mailtrap

**Canonical:** https://apis.io/providers/mailtrap/  
**Website:** https://mailtrap.io/  
**APIs profiled:** 3

Mailtrap provides a RESTful email infrastructure API with high deliverability rates, an email sandbox for safe testing, and actionable analytics. It offers SDKs for smooth integration and supports both transactional sending and bulk email delivery.

## Kin Score — 37.1 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 37.1).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 53.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 18.4 |
| Developer Ergonomics | 33.3 |
| Commercial Clarity | 32.9 |
| Access Clarity | 32.9 |

## Agent readiness — 19.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | bearer |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| 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 (3)

- **Mailtrap Inboxes API** — Manage sandbox inboxes
- **Mailtrap Messages API** — Inspect captured messages
- **Mailtrap Send API** — Send transactional and bulk emails

## Agentic access (1)

- **Mailtrap Agentic Access** — 23 operations · 12 acting · 1 human-in-the-loop

## Security (2)

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

## Plans (1)

- **Mailtrap Plans Pricing**

## Tags

Email, Email Delivery, Email Sandbox, Email Testing, Transactional Email

---

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