Resend · Email for developers

# 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) ## 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.

openapi: 3.0.3 info: title: Resend version: 1.5.0 description: 'Resend is the email platform for developers.' servers: - url: https://api.resend.com security: - bearerAuth: [] tags: - name: Emails description: Start sending emails through the Resend API. - name: Domains description: Create and manage domains through the Resend API. - name: API Keys description: Create and manage API Keys through the Resend API. - name: Audiences description: 'Deprecated: Use Seg