@assemblyline-agents/resend

Official Assembly Line connection plugin for Resend's hosted Streamable HTTP MCP server at https://mcp.resend.com/mcp.

The connection exposes Resend email, inbound email, broadcast, contact, template, automation, domain, segment, topic, webhook, and delivery-log tools. Reviewed tools use the plugin's default authority. Gate or remove named actions through the typed connection exception shown below.

Install

assembly-line add resend agent

Create a team-scoped API key in Resend and store it as RESEND_API_KEY on the Assembly Line runtime host. The plugin sends the key to Resend as a Bearer token; it never places the key in prompts or the agent sandbox. Set RESEND_MCP_URL only to override the official hosted endpoint.

A full_access key is required for account reads and management. A sending_access key can be used for a send-only agent when the connection's tools filter is restricted to the required send operations. Verify a sender domain before sending to recipients outside the Resend test account.

Gate or remove named actions through plugins.resend.connections.resend.approval or disable in agent.md.

Resend's MCP tools that return newly issued credentials are excluded. Create API keys and webhook signing secrets outside agent context, then store them in the deployment's secret manager.

See the Resend MCP server documentation for provider setup and the current remote tool surface.

Part of Assembly Line

This package is part of Assembly Line. See the developer documentation for setup, agent authoring, and deployment guides.

License

MIT