1
Find where your app adds an MCP server
Look for Connectors, Integrations, Plugins, Tools or MCP in its settings.
2
Paste this address
Most apps ask only for this address. If the app asks how to sign in, choose OAuth. When a Trillion page opens, tap your passkey. If the app asks for a client id, leave it empty so it registers itself; there is nothing to type.When it worked: your app lists Trillion’s tools.
3
Only if the app cannot sign in and asks for an API key
Some older apps and scripts cannot sign in. Only for those: make a personal key in Account & security in your Trillion, copy it once, and paste it where the app asks for a key. An app that can sign in never needs one.Anyone holding a personal key can use your account until you turn it off on your account page, so keep it safe.
Details for app builders
If you are building the app that connects, these are the values it needs. They are also published athttps://app.gettrillion.ai/.well-known/oauth-authorization-server.
An agent that should reach only part of a person’s Trillion can be given a key with a chosen reach: one shared space, every space, or only their private Trillion. The person’s AI makes it with
make_agent_key.