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Any client that speaks MCP over HTTP can reach your account. Give it these three facts in whatever shape it uses.
1

Create a key

On Settings → API & MCP, create a key and copy it — it is shown once.
2

Put the key in your environment

3

Give your client the three facts

4

Or let the client configure itself

Paste this into your client’s agent:
5

Check it

Ask the client to list its tools and confirm the Goosy ones appear.
Whatever the client’s syntax, reference the variable rather than pasting the key — a config file with a key in it is a credential in your version history.

Prefer plain HTTP?

Every action is also a normal POST endpoint with the same key. See the Quickstart and the API reference.