Relai Server

MCP (Model Context Protocol) server for RelAI. Lets any MCP-compatible AI agent authorize itself with RelAI and call paid x402 APIs autonomously.

Tools

Tool	Description
request_authorization	Request a one-time consent link from RelAI to send to the user
poll_authorization	Check if the user approved — returns the service key
call_api	Call any paid API through the RelAI Metered proxy
check_balance	Check the remaining USDC balance in the user's wallet

Setup

npm install
npm run build

Usage with Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "relai": {
      "command": "node",
      "args": ["/path/to/relai-mcp-server/dist/index.js"],
      "env": {
        "RELAI_API_BASE": "https://api.relai.fi"
      }
    }
  }
}

Usage with any MCP client

RELAI_API_BASE=https://api.relai.fi node dist/index.js

Authorization Flow

1. Agent calls request_authorization → gets a link
2. Agent shows the link to the user
3. User opens the link and clicks Allow on relai.fi
4. Agent calls poll_authorization → gets serviceKey + agentId
5. Agent calls call_api for any paid API — payments are automatic

Environment Variables

Variable	Default	Description
RELAI_API_BASE	https://api.relai.fi	RelAI API base URL
SATI_PAYER_KEYPAIR	(optional)	Solana keypair (base58 or JSON byte array) — enables SATI on-chain agent identity

SATI Integration (optional)

If SATI_PAYER_KEYPAIR is set, the server automatically:

1. Registers a SATI identity NFT on Solana when the user approves authorization — giving the agent a verifiable on-chain identity with x402Support: true
2. Submits positive feedback on-chain after every successful paid API call — building the agent's reputation over time

If SATI_PAYER_KEYPAIR is not set, SATI is silently disabled and everything works normally.

{
  "mcpServers": {
    "relai": {
      "command": "node",
      "args": ["/path/to/relai-mcp-server/dist/index.js"],
      "env": {
        "RELAI_API_BASE": "https://api.relai.fi",
        "SATI_PAYER_KEYPAIR": "<your-solana-wallet-base58>"
      }
    }
  }
}