# Resend

> Resend is the email API for developers. Send transactional and marketing emails at scale with a simple, modern API.

For AI agents and automation, use the tools below.

## Command line tool

Install and use the Resend CLI from the terminal.

- [Install](https://resend.com/install.sh)
- [Repository](https://github.com/resend/resend-cli)

## MCP Server

Add Resend to Cursor, Claude, and other MCP clients.

- [MCP Server](https://github.com/resend/resend-mcp)
- [MCP Discovery](https://resend.com/.well-known/mcp.json)

## Skills

Best practices for building and sending emails with agents.

- [Skills Discovery](https://resend.com/.well-known/agent-skills/index.json)
- [Resend](https://raw.githubusercontent.com/resend/resend-skills/refs/heads/main/skills/resend/SKILL.md)
- [React Email](https://raw.githubusercontent.com/resend/resend-skills/refs/heads/main/skills/react-email/SKILL.md)
- [Email Best Practices](https://raw.githubusercontent.com/resend/resend-skills/refs/heads/main/skills/email-best-practices/SKILL.md)
- [Resend CLI](https://raw.githubusercontent.com/resend/resend-skills/refs/heads/main/skills/resend-cli/SKILL.md)
- [Agent Email Inbox](https://raw.githubusercontent.com/resend/resend-skills/refs/heads/main/skills/agent-email-inbox/SKILL.md)

## Documentation

The llms.txt file containing all Resend documentation.

- [Full documentation](https://resend.com/docs/llms.txt)

## OpenAPI spec

The full OpenAPI 3.0 specification for the Resend API.

- [OpenAPI spec (YAML)](https://resend.com/openapi.yaml)
- [OpenAPI spec (JSON)](https://resend.com/openapi.json)

## Pricing

Plans, features, and cost-per-email for transactional and marketing emails.

- [Pricing (Markdown)](https://resend.com/pricing.md)
- [Pricing (HTML)](https://resend.com/pricing)

## Blog

Articles on email infrastructure, developer experience, and product updates. The index enumerates every post as a flat list of links. Append `.md` to any post URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Blog index (Markdown)](https://resend.com/blog.md)
- [Blog index (HTML)](https://resend.com/blog)
- Example: [https://resend.com/blog/agent-experience.md](https://resend.com/blog/agent-experience.md)

## Changelog

Resend product updates and changes. The index enumerates every entry as a flat list of links. Append `.md` to any entry URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Changelog index (Markdown)](https://resend.com/changelog.md)
- [Changelog index (HTML)](https://resend.com/changelog)
- Example: [https://resend.com/changelog/adding-support-for-nextjs-14.md](https://resend.com/changelog/adding-support-for-nextjs-14.md)

## Handbook

The process behind Resend — engineering, design, marketing, people, and company values. The index enumerates every handbook entry as a flat list of links. Append `.md` to any handbook URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Handbook index (Markdown)](https://resend.com/handbook.md)
- [Handbook index (HTML)](https://resend.com/handbook)
- Example: [https://resend.com/handbook/engineering/how-we-approach-ci-cd.md](https://resend.com/handbook/engineering/how-we-approach-ci-cd.md)

## Customers

Customer stories — how teams use Resend in production. The index enumerates every customer story as a flat list of links. Append `.md` to any customer URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Customers index (Markdown)](https://resend.com/customers.md)
- [Customers index (HTML)](https://resend.com/customers)
- Example: [https://resend.com/customers/airgoods.md](https://resend.com/customers/airgoods.md)

## Legal

Terms of service, privacy policy, DPA, and other legal documents. The index enumerates every legal document as a flat list of links. Append `.md` to any legal URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Legal index (Markdown)](https://resend.com/legal.md)
- [Legal index (HTML)](https://resend.com/legal)
- Example: [https://resend.com/legal/terms-of-service.md](https://resend.com/legal/terms-of-service.md)

## Migrate

Guides for migrating from other email providers to Resend. The index enumerates every migration guide as a flat list of links. Append `.md` to any migration URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Migrate index (Markdown)](https://resend.com/migrate.md)
- [Migrate index (HTML)](https://resend.com/migrate)
- Example: [https://resend.com/migrate/sendgrid.md](https://resend.com/migrate/sendgrid.md)

## Security

Security and compliance documentation — GDPR, SOC 2, responsible disclosure. The index enumerates every security document as a flat list of links. Append `.md` to any security URL, or send `Accept: text/markdown`, to receive the raw markdown source.

- [Security index (Markdown)](https://resend.com/security.md)
- [Security index (HTML)](https://resend.com/security)
- Example: [https://resend.com/security/soc-2.md](https://resend.com/security/soc-2.md)

## SDKs

The official libraries maintained by the Resend team for each platform.

- [Node.js](https://github.com/resend/resend-node)
- [Python](https://github.com/resend/resend-python)
- [PHP](https://github.com/resend/resend-php)
- [Ruby](https://github.com/resend/resend-ruby)
- [Go](https://github.com/resend/resend-go)
- [Java](https://github.com/resend/resend-java)
- [Laravel](https://github.com/resend/resend-laravel)
- [Rust](https://github.com/resend/resend-rust)
- [.NET](https://github.com/resend/resend-dotnet)