XFuel

Lets an assistant submit AI inference tasks to XFuel, pay per task in USDC or TFUEL, and fetch or verify zero-knowledge proofs.

What you can do

XFuel is a local stdio MCP server that connects an assistant to the XFuel inference protocol. It submits AI inference tasks, handles per-task payment through x402 (USDC) or TFUEL, and retrieves and verifies zero-knowledge proofs of the results. An optional on-chain nullifier read can be enabled for proof verification.

When to use it

Use it when you want an assistant to run inference through XFuel and settle payment per task, or when you need to fetch and verify ZK proofs for those results. It is not useful if you only need a general-purpose model provider or have no funded wallet.

Requirements

Runs locally as an npm package (xfuel-mcp) over stdio, so Node.js is needed. Environment variables: XFUEL_API_KEY (defaults to a shared public demo key), XFUEL_API_URL (defaults to the hosted testnet demo), optional XFUEL_MCP_AUTH_TOKEN for HTTP transport, XFUEL_PAYER_PRIVATE_KEY for the pay_with_usdc tool, and XFUEL_RPC_URL plus ZK_VERIFIER_ADDRESS for the optional on-chain nullifier read. Network access is required.