x402 Universal Payer — MCP Server 安装与配置

{
  "id": "io.github.nirholas/x402-bridge",
  "type": "mcp-server",
  "version": "1.0.0",
  "displayName": "x402 Universal Payer",
  "description": "Pay any x402 endpoint on the open web: auto-paying bridge with Bazaar discovery and spend caps.",
  "repository": {
    "url": "https://github.com/nirholas/three.ws",
    "source": "github",
    "subfolder": "mcp-bridge"
  },
  "homepage": "https://three.ws",
  "distribution": {
    "packages": [
      {
        "registryType": "npm",
        "identifier": "@three-ws/mcp-bridge",
        "version": "1.0.0",
        "runtimeHint": "npx",
        "transport": "stdio",
        "environmentVariables": [
          {
            "name": "MCP_BRIDGE_EVM_PRIVATE_KEY",
            "description": "0x-prefixed 32-byte hex private key that funds USDC payments on EVM chains (Base, Arbitrum, …). At least one of the EVM/SVM keys is required. Treat like cash — use a dedicated low-balance wallet.",
            "isSecret": true
          },
          {
            "name": "MCP_BRIDGE_SVM_PRIVATE_KEY",
            "description": "Solana secret key that funds USDC payments: base58 64-byte secret key (Phantom / solana-keygen format) or a JSON array of 64 integers. At least one of the EVM/SVM keys is required. Treat like cash.",
            "isSecret": true
          },
          {
            "name": "MCP_BRIDGE_MAX_PRICE_PER_CALL_ATOMIC",
            "description": "Per-call spending cap in atomic units (USDC has 6 decimals). Payments above this abort with a clear reason."
          },
          {
            "name": "MCP_BRIDGE_MAX_TOTAL_ATOMIC",
            "description": "Cumulative session spending ceiling in atomic units. Once total spend would exceed it, further payments abort until restart."
          },
          {
            "name": "MCP_BRIDGE_ALLOWED_PAYTO",
            "description": "Comma-separated payee allowlist. When set, any payment whose payTo address is not listed is refused."
          },
          {
            "name": "MCP_BRIDGE_ALLOWED_HOSTS",
            "description": "Comma-separated hostname allowlist for outbound paid requests. When set, any other host is refused before a request is signed."
          },
          {
            "name": "MCP_BRIDGE_ALLOW_HTTP",
            "description": "Set to 1 to allow http:// targets (local development only). https is enforced otherwise."
          },
          {
            "name": "MCP_BRIDGE_DISCOVER_LIMIT",
            "description": "Max number of x402 Bazaar resources to register as dynamic tools at startup. Set 0 to disable discovery."
          },
          {
            "name": "MCP_BRIDGE_BAZAAR_URL",
            "description": "x402 Bazaar discovery endpoint. Override to point at a self-hosted or alternative bazaar."
          },
          {
            "name": "MCP_BRIDGE_BATCH_DEPOSIT_MULTIPLIER",
            "description": "How many request-amounts to deposit at once when opening an EVM batch-settlement channel."
          },
          {
            "name": "MCP_BRIDGE_MAX_DEPOSIT_ATOMIC",
            "description": "Hard cap in atomic units on a single batch-settlement channel deposit or top-up."
          },
          {
            "name": "X402_MCP_BRIDGE_CHANNELS_DIR",
            "description": "Directory for persisted batch-settlement channel state (survives client restarts)."
          },
          {
            "name": "RPC_URL_8453",
            "description": "Per-chain RPC override, one variable per chain id (RPC_URL_<chainId>, e.g. RPC_URL_8453 for Base). Defaults to viem's public RPC for that chain."
          }
        ]
      }
    ],
    "remotes": []
  },
  "dependencies": [],
  "installTargets": [
    "claude-code",
    "claude-desktop",
    "cursor",
    "vscode"
  ],
  "keywords": [],
  "provenance": {
    "origin": "official-mcp-registry",
    "originalId": "io.github.nirholas/x402-bridge",
    "originalUrl": "https://registry.modelcontextprotocol.io/v0.1/servers/io.github.nirholas%2Fx402-bridge/versions/latest",
    "isOfficial": true,
    "status": "active"
  }
}