import * as ed from '@noble/ed25519'; import { mnemonicToAccount, signTypedData } from 'viem/accounts'; import axios from 'axios'; // Generate a keypair const privateKey = ed.utils.randomPrivateKey(); const publicKeyBytes = await ed.getPublicKey(privateKey); const key = '0x' + Buffer.from(publicKeyBytes).toString('hex'); // EIP-712 domain and types for SignedKeyRequest const SIGNED_KEY_REQUEST_VALIDATOR_EIP_712_DOMAIN = { name: 'Farcaster SignedKeyRequestValidator', version: '1', chainId: 10, verifyingContract: '0x00000000fc700472606ed4fa22623acf62c60553', }; const SIGNED_KEY_REQUEST_TYPE = [ { name: 'requestFid', type: 'uint256' }, { name: 'key', type: 'bytes' }, { name: 'deadline', type: 'uint256' }, ]; // Generate a Signed Key Request signature const appFid = process.env.APP_FID; const account = mnemonicToAccount(process.env.APP_MNEMONIC); const deadline = Math.floor(Date.now() / 1000) + 86400; // signature is valid for 1 day const signature = await account.signTypedData({ domain: SIGNED_KEY_REQUEST_VALIDATOR_EIP_712_DOMAIN, types: { SignedKeyRequest: SIGNED_KEY_REQUEST_TYPE, }, primaryType: 'SignedKeyRequest', message: { requestFid: BigInt(appFid), key, deadline: BigInt(deadline), }, }); // Create a Signed Key Request const warpcastApi = 'https://api.warpcast.com'; const { token, deeplinkUrl } = await axios .post(`${warpcastApi}/v2/signed-key-requests`, { key, requestFid: appFid, signature, deadline, }) .then((response) => response.data.result.signedKeyRequest); console.log('Deep link URL:', deeplinkUrl); console.log('Open this URL on your mobile device with Warpcast installed to authorize this key');

{ "mcpServers": { "warpcast": { "command": "node", "args": [ "/absolute/path/to/mcp-warpcast-server/build/index.js" ], "env": { "WARPCAST_FID": "your_fid_here", "WARPCAST_PRIVATE_KEY": "your_private_key_here", "WARPCAST_PUBLIC_KEY": "your_public_key_here" } } } }