# Resend

**Canonical:** https://apis.io/providers/resend/  
**APIs profiled:** 13

Resend is a developer-first email API platform that simplifies sending and managing transactional and marketing emails. It provides a clean REST API with bearer token authentication, supporting email sending, domain management, API key management, audience and contact management, and broadcast campaigns. Resend offers SDKs for Node.js, Python, Go, Ruby, PHP, Java, .NET, Rust, Elixir, and more, along with a React Email library and official MCP server.

## Kin Score — 50.5 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 50.5).

| Facet | Score |
|---|---|
| Discoverability | 72.2 |
| Contract Quality | 70.3 |
| Governance | 11.4 |
| Contract Governance | 11.4 |
| Operational Transparency | 55.3 |
| Developer Ergonomics | 38.1 |
| Commercial Clarity | 47.4 |
| Access Clarity | 47.4 |

## Agent readiness — 31.6 (agent-aware)

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

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (13)

- **Resend Apis API** — The Apis API from Resend — 2 operation(s) for apis.
- **Resend Audience API** — The Audience API from Resend — 3 operation(s) for audience.
- **Resend Audiences API** — Create and manage Audiences through the Resend API.
- **Resend Batch API** — The Batch API from Resend — 1 operation(s) for batch.
- **Resend Broadcasts API** — The Broadcasts API from Resend — 2 operation(s) for broadcasts.
- **Resend Cancel API** — The Cancel API from Resend — 1 operation(s) for cancel.
- **Resend Contacts API** — Create and manage Contacts through the Resend API.
- **Resend Domains API** — Create and manage domains through the Resend API.
- **Resend Email API** — The Email API from Resend — 3 operation(s) for email.
- **Resend Emails API** — Start sending emails through the Resend API.
- **Resend Keys API** — The Keys API from Resend — 2 operation(s) for keys.
- **Resend Send API** — The Send API from Resend — 1 operation(s) for send.
- **Resend Verify API** — The Verify API from Resend — 1 operation(s) for verify.

## MCP servers (1)

- **MCP Server**

## Security (3)

- **Resend Domain Security** — TLSv1.3 · HSTS · DMARC
- **Resend Vulnerability Disclosure** — security.txt · contact published
- **Resend Trust Center** — SOC 2, ISO 27001, HIPAA, GDPR

## Plans (1)

- **Resend Plans Pricing**

## Tags

Email, Developer Tools, Transactional Email, Marketing Email

---

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