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Factory Droid can browse the Nevermined Catalog and pay for services as it works, without you handing over an API key. You add one server, approve a single spending cap, and Droid does the rest. This is the per-host walkthrough; for the concept and the other assistants, see Using the Catalog from your web assistant.

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Before you connect

1

A Nevermined account

Free, at nevermined.app. You never share an API key with Droid — the consent cap is the credential.
2

A funded wallet

A paid call draws on a spending cap you approve during connect — a commerce grant: a capped, revocable budget funded from your own wallet, not a key. Fund that wallet first with the asset the service settles in — see Fund your wallet. You approve the cap itself in Approve the spending cap.
Start on sandbox, where you use testnet funds and nothing costs real money, before you point Droid at live.

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Add the Catalog to Factory Droid

1

Add the MCP server

Add the Nevermined Catalog as a remote HTTP MCP server with droid mcp add, pointing at the environment you want:
The entry lands in your user config at ~/.factory/mcp.json (a project-scoped .factory/mcp.json works too — don’t commit secrets there). Pass no --header and no --no-oauth: Droid identifies itself to Nevermined with its own client metadata document and runs the OAuth (PKCE) flow, so there is nothing to register and no key to paste.
2

Sign in

droid mcp list shows the server as needs authentication until you sign in. Run /mcp, select the Nevermined server and choose Authenticate — Droid opens Nevermined’s consent page in your browser. See Approve the spending cap.

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Approve the spending cap

Factory Droid opens Nevermined’s consent page when you authenticate the server — the /mcp → Authenticate step above. It is the one place a human is required.
1

Check who and where

The page shows the Sandbox / Live badge and who is asking. On live, the cap is real money.
2

Set the cap and validity

Set the spending cap (USDC or EURC) and how long the grant is valid for, then Grant access.
That approval is a commerce grant: it spends only from the budget you just approved, only through the Router, and you can revoke it any time. Nevermined’s routing fee comes out of the same cap, and the grant can also read your payment history and wallet balance — the cap bounds what it can spend, not what it can see.

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Make your first paid call

Ask for something only live data can answer, and name the connector so Droid reaches for it rather than answering from memory.
1

Browse for free

Ask “list the Nevermined catalog categories” — a free tool call that doesn’t draw on your cap.
2

Ask it to buy

“Buy the service with slug <slug> through the Nevermined connector and show me the response.” The paid call draws on the cap you approved and returns the merchant’s response.
If Droid answers without paying, it answered from its own knowledge — name the connector and ask for live data. More on phrasing: Catalog MCP tips.

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Disconnect

  • Revoke the budget (Nevermined side). Open Connections and disconnect Factory Droid. The credential stops working on its next call; discovery still works.
  • Remove the connector (Factory Droid side). In /mcp, choose Clear auth to drop the stored OAuth credentials, then Remove to delete the server — or delete its entry from ~/.factory/mcp.json.
To spend again — after you disconnect, or after a cap is used up — re-run the connect step and approve a new cap. A budget is never widened or extended in place.

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Next

Using the Catalog from your web assistant

The concept and the other assistants.

Catalog MCP — full reference

Every click path, the consent details, and every refusal code.