npm · xfuel-mcp
XFUEL_API_URL — XFuel API base URL. Defaults to the hosted testnet demo.
XFUEL_API_KEY · secret — API key sent as X-API-Key. Defaults to the shared public demo key.
XFUEL_MCP_AUTH_TOKEN · secret — Optional bearer token required on the HTTP transport (Authorization: Bearer <token>).
XFUEL_RPC_URL — Theta RPC URL enabling verify_proof's optional on-chain nullifier read.
ZK_VERIFIER_ADDRESS — ZKVerifierSP1 contract address (paired with XFUEL_RPC_URL).
XFUEL_PAYER_PRIVATE_KEY · secret — Funded payer private key that enables the pay_with_usdc tool. Moves USDC — keep secret; use a low-balance wallet.