IBM Granite via x402 MCP Server

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add ibm-x402-mcp -e 'MCP_SVM_PAYMENT_ADDRESS=<MCP_SVM_PAYMENT_ADDRESS>' -e 'WATSONX_API_KEY=<WATSONX_API_KEY>' -- npx -y @three-ws/ibm-x402-mcp

{
  "mcpServers": {
    "ibm-x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/ibm-x402-mcp"
      ],
      "env": {
        "MCP_SVM_PAYMENT_ADDRESS": "<MCP_SVM_PAYMENT_ADDRESS>",
        "WATSONX_API_KEY": "<WATSONX_API_KEY>"
      }
    }
  }
}

[mcp_servers.ibm-x402-mcp]
command = "npx"
args = ["-y", "@three-ws/ibm-x402-mcp"]
env = { MCP_SVM_PAYMENT_ADDRESS = "<MCP_SVM_PAYMENT_ADDRESS>", WATSONX_API_KEY = "<WATSONX_API_KEY>" }

{
  "mcpServers": {
    "ibm-x402-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/ibm-x402-mcp"
      ],
      "env": {
        "MCP_SVM_PAYMENT_ADDRESS": "<MCP_SVM_PAYMENT_ADDRESS>",
        "WATSONX_API_KEY": "<WATSONX_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "ibm-x402-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/ibm-x402-mcp"
      ],
      "env": {
        "MCP_SVM_PAYMENT_ADDRESS": "<MCP_SVM_PAYMENT_ADDRESS>",
        "WATSONX_API_KEY": "<WATSONX_API_KEY>"
      }
    }
  }
}

Put your own values in place of <MCP_SVM_PAYMENT_ADDRESS> (Solana wallet address that receives USDC payments from tool callers (server operator's receiving wallet). Required to accept x402 payments), <WATSONX_API_KEY> (IBM Cloud API key used by the server to call watsonx.ai on behalf of end users. Create one at https://cloud.ibm.com/iam/apikeys). The author’s registry entry marks them as required.

Optional settings from the registry entry, left out of the block above: WATSONX_PROJECT_ID (watsonx.ai project id scoping all inference calls. Find it under your project → Manage → General → Project ID. Provide this or WATSONX_SPACE_ID), WATSONX_SPACE_ID (watsonx.ai deployment space id. Alternative to WATSONX_PROJECT_ID), WATSONX_URL (Regional watsonx.ai inference host. Defaults to https://us-south.ml.cloud.ibm.com. Other regions: eu-de, eu-gb, jp-tok, au-syd, ca-tor), WATSONX_MODEL_ID (Default chat/generation Granite model id. Defaults to ibm/granite-3-8b-instruct), WATSONX_EMBED_MODEL_ID (Default embedding model id. Defaults to ibm/granite-embedding-278m-multilingual), X402_FEE_PAYER_SOLANA (Solana account that sponsors transaction fees for x402 payments. Defaults to the three.ws fee payer), X402_FACILITATOR_URL (x402 facilitator endpoint for payment verification and settlement. Defaults to https://facilitator.payai.network).