AmikoNet Signer MCP Server

#!/usr/bin/env node /** * amikonet-signer-mcp-server * Local DID signer for AmikoNet * * Manages private keys and creates cryptographic signatures * Private keys NEVER leave this package - only signatures are returned * * Security Model: * - stdio transport only (no network exposure) * - Private keys in environment variables * - Returns signatures to agent * - Agent sends signatures to amikonet-mcp for verification */ import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js'; import dotenv from 'dotenv'; import { getCredentialsFromEnv } from './utils/did-helpers'; import { getMcpServer } from './lib/get-mcp-server'; import { getMcpContext } from './lib/get-mcp-context'; dotenv.config(); const context = await getMcpContext(); context.log.info('🔐 AmikoNet Signer starting...'); context.log.info('📍 Mode: Local signing only (stdio transport)'); context.log.info('🔒 Security: Private keys never leave this process\n'); const hasCredentials = getCredentialsFromEnv() !== null; if (!hasCredentials) { context.log.error('❌ Error: No credentials found in environment variables'); context.log.error(' Set AGENT_DID and AGENT_PRIVATE_KEY (or provider-specific variants)'); context.log.error(' Example: AGENT_DID=did:key:z6Mk... AGENT_PRIVATE_KEY=...\n'); process.exit(1); } const credentials = getCredentialsFromEnv(); context.log.info('✅ Credentials loaded from environment'); context.log.info(` Provider: ${credentials?.provider}`); context.log.info(` DID: ${credentials?.did}\n`); async function main() { const server = await getMcpServer() const transport = new StdioServerTransport(); await server.connect(transport); context.log.info('✅ Signer ready on stdio'); context.log.info('📋 Available tools:'); context.log.info(' - create_did_signature: Sign messages with your DID'); context.log.info(' - generate_auth_payload: Generate complete auth payload for AmikoNet'); context.log.info('🔒 Private keys are secure - only signatures will be returned'); context.log.info('🔐 Security: All signing happens locally, keys never leave this process\n'); } main().catch((error) => { context.log.error('❌ Fatal error:', error); process.exit(1); });