Model Context Protocol (MCP) is an open standard that lets an AI agent talk to an external service through a single, structured interface — the service exposes the actions it supports and the agent calls them by name. When a platform tool supports MCP, you have two ways to expose it to your agent:
- Action mode. Pick individual actions on the platform tool (e.g. "create card", "list cards"). Same as before MCP existed.
- MCP mode. Pick the platform tool itself; the agent talks to the MCP server and discovers what actions are available at runtime.
Tools that ship with MCP out of the box
These tools publish a hosted MCP server and authenticate via the OAuth connection you already have on file. You don't enter a URL or token — just connect via OAuth as usual and the agent picker shows them as MCP-bindable automatically:
- Notion
- Linear
- Asana
- PayPal
- Intercom
- Sentry
- Canva
The list grows as vendors publish official MCP endpoints. Each tool's detail page shows an MCP server capability chip when MCP is enabled.
Self-hosted MCP (Custom MCP tool)
- From Platform tools connect the Custom MCP tool.
- Fill in your MCP server URL plus the authentication (bearer token, custom headers, or none) the server expects.
- Hit Test connection. The engine performs an SSRF check on the URL and rejects private / loopback / cloud-metadata addresses.
- Save. Your team's connection is ready to bind from any agent.
Overriding the MCP URL on a hosted tool
If you self-host a fork of a hosted tool (e.g. a private Notion-compatible MCP server), open your existing connection editor and set the MCP server URL (override) field. The platform-default URL is used when this field is blank.
Notes
- Only the agent owner's connection is used at runtime, not the connection of the end-user triggering the agent.
- Per-day MCP call caps are enforced by your plan.
- v1 supports the streamable HTTP transport. SSE and stdio are reserved for future releases.
- MCP calls show up on the BYOK activity page — same audit log as platform actions and AI model calls.