Resend Changelog

Resend is now a GitHub secret scanning partner. When a Resend API key is exposed in public repositories, gists, or issues, GitHub alerts Resend, which revokes the key automatically and notifies all admins. This protection is on by default for every account.

OAuth 2.1 with PKCE is now available for the Resend API, enabling desktop apps, hosted integrations, and MCP hosts to get scoped access tokens without sharing API keys. Dynamic Client Registration allows MCP hosts to register at runtime, and users can revoke access from their Resend account settings.

The Broadcast and Template editors now include an emoji picker accessible by typing : followed by an emoji name. The emoji extension was built using the open-source React Email editor's extensible architecture, which exposes EmailNode to support custom blocks like image uploads, social post embeds, and inline charts.

All email webhooks and GET email endpoints now include the Message-ID header value, enabling threaded replies, reply matching, and cross-system correlation without new primitives.

Resend has launched a hosted remote MCP server at mcp.resend.com/mcp with built-in OAuth authentication for agent integrations. The server supports HTTP transport for use across Claude, Claude Code, Cursor, Codex, Warp, and other MCP-compatible clients, and includes API key authentication for headless environments. Full platform access covers emails, templates, broadcasts, contacts, logs, and webhooks, with user agent tracing for audit visibility.

Paste a link in the editor and turn it into a rich Open Graph preview.

Sign up for Resend without leaving Vercel or the Vercel CLI.

Import millions of contacts from a CSV in a single upload, with an API, AI column mapping, and full SDK coverage.

Verify ownership of a domain in use by another Resend team and transfer it to yours.

Install the MCP server and every Resend skill directly from the official Claude Code plugins.

Send Auth0 transactional emails through Resend using the official integration.

Reference existing content in AI prompts across broadcasts, templates, and automations.

Embed bar, line, and area charts directly in your emails.

Embed bar, line, and area charts directly in your emails.

Access your API request logs from anywhere.

Our official MCP server with full Resend platform coverage and an official HTTP transport.

Our official MCP server with Resend platform coverage, and an official HTTP transport.

Send emails asynchronously in Python using the new async methods powered by httpx.

Send emails asynchronously in Python using the new async methods powered by httpx.

Built for humans and AI agents. Manage your emails from the terminal.