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About

Cross-chain bridge and swap quotes, fee estimation, and transaction tracking via Relay Protocol.

Use this server

Add it to your MCP client. The catalogue lists this config verbatim from its source — it does not run, download, or vouch for the server. Review the command before you run it.

Transportstdio (runs a local command)
Env varsRELAY_API_KEY RELAY_API_URL
Claude Code
claude mcp add --env RELAY_API_KEY= --env RELAY_API_URL= relay-mcp -- npx @relayprotocol/relay-mcp
Cursor

Add to Cursor

If the button doesn't open Cursor, use the JSON below — Cursor accepts the same mcpServers config.

VS Code
code --add-mcp '{"name":"relay-mcp","command":"npx","args":["@relayprotocol/relay-mcp"],"env":{"RELAY_API_KEY":"","RELAY_API_URL":""}}'
JSON
{
  "mcpServers": {
    "relay-mcp": {
      "command": "npx",
      "args": [
        "@relayprotocol/relay-mcp"
      ],
      "env": {
        "RELAY_API_KEY": "",
        "RELAY_API_URL": ""
      }
    }
  }
}

Environment variables are listed by name only — fill in your own values. Entries never carry secrets.