TezosX MCP

A Model Context Protocol server for Tezos with x402 payment support.

Warning: This MCP is in alpha. Most things should work, but please be prepared for troubleshooting. Please report any problems on our issues page.

As always, verify the output of your LLM before approving any transactions. Set reasonable limits. Trust but verify.

Quick Deploy

<details> <summary>Railway deployment steps</summary>

1. Deploy the template (set TEZOS_NETWORK to shadownet before clicking deploy if desired)
2. Click the deployed item and go to "Settings"
3. Scroll down to "Public Networking"
4. Your domain will be something like tezosx-mcp-production-a12b.up.railway.app
5. Navigate to your domain to open the frontend config, and set up your spending key and contract address
6. Back on Railway, navigate to the "Variables" tab and set SPENDING_PRIVATE_KEY and SPENDING_CONTRACT to the values you received
7. Optional: Enable the 'serverless' setting to reduce resource usage
8. Restart the deployment
9. Set up your AI Platform to use [your domain]/mcp as the URL

</details>

<details> <summary>Render deployment steps</summary>

1. Click the button above to deploy the template
2. Once deployed, under "Sync" click "View details"
3. Click the hyperlink to "tezosx-mcp"
4. Navigate to your onrender.com custom URL and set up your spending key and contract address
5. Back on Render, navigate to the "Environment" tab and set SPENDING_PRIVATE_KEY and SPENDING_CONTRACT environment variables
6. Click "Manual deploy" at the top right and select "Restart service"
7. Set up your AI Platform to use [your domain]/mcp as the URL

Note: Render spins down free plan services during inactivity. The next request can take up to a minute while the instance spins back up. Upgrade to a paid plan to avoid this.

</details>

Components

Component	Description	Deployment
MCP Server	Tezos wallet tools for AI agents	Claude Desktop / Railway / Render
Facilitator	Verifies & settles x402 payments	Cloudflare Worker
Mint Worker	Mints NFT receipts via x402	Cloudflare Worker
NFT Contract	FA2 contract for collector cards	Tezos blockchain

---

MCP Server

Installation

npm install @ecadlabs/tezosx-mcp

Or run directly:

npx @ecadlabs/tezosx-mcp

Claude Desktop Configuration

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "tezos": {
      "command": "npx",
      "args": ["-y", "@ecadlabs/tezosx-mcp"],
      "env": {
        "TEZOS_NETWORK": "mainnet"
      }
    }
  }
}

Or run from source:

1. Clone the TezosX-mcp repository
2. In the /TezosX-mcp/mcp folder run npm i && npm run build

{
  "mcpServers": {
    "tezosx": {
      "command": "node",
      "args": ["/path/to/TezosX-mcp/mcp/dist/index.js"],
      "env": {
        "TEZOS_NETWORK": "mainnet",
        "SPENDING_CONTRACT": "KT1...",
        "SPENDING_PRIVATE_KEY": "edsk..."
      }
    }
  }
}

Environment Variables

Variable	Required	Description
SPENDING_PRIVATE_KEY	Yes	Private key for the spending account (edsk/spsk/p2sk format)
SPENDING_CONTRACT	Yes	Address of the spending-limited wallet contract (KT1...)
TEZOS_NETWORK	No	mainnet (default) or shadownet
MCP_TRANSPORT	No	stdio (default) or http
WEB_PORT	No	Frontend port (default: 13205)

Available Tools

Tool	Description
get_balance	Get the balance of the spending wallet
get_addresses	Get addresses associated with the spending contract
get_limits	Get current spending limits and allowances
get_operation_history	Get recent operations from the wallet
get_dashboard	Open the web dashboard for wallet management
send_xtz	Send XTZ from the spending wallet
reveal_account	Reveal an unrevealed account on-chain
create_x402_payment	Create an x402 payment header
fetch_with_x402	Fetch a URL with x402 payment
parse_x402_requirements	Parse x402 payment requirements from a response

Web Dashboard

The MCP server includes a web dashboard for managing the spending wallet. It starts automatically on http://localhost:13205 (or your configured WEB_PORT).

---

Facilitator (Cloudflare Worker)

A Cloudflare Worker that verifies and settles x402 payments using the exact-tezos scheme.

Deploy

cd facilitator
npm install
npm run deploy

Configuration

Set TEZOS_RPC_URL in wrangler.jsonc:

{
  "vars": {
    "TEZOS_RPC_URL": "https://shadownet.tezos.ecadinfra.com"
  }
}

API

Endpoint	Description
GET /health	Returns service status and connected block
POST /verify	Validates a payment payload. Returns { valid: true } or { valid: false, reason: "..." }
POST /settle	Injects a verified payment to the network. Returns { success: true, operationHash: "..." }

Notes:

• In-memory double-spend protection resets on deployment
• Only supports exact-tezos scheme with XTZ
• Operations must be verified before settlement

---

NFT Contract

Deploy the FA2 contract and authorize a minter:

cd mint
npm install
npm run deploy -- --minter tz1...

---

Mint Worker (Cloudflare Worker)

A Cloudflare Worker that mints Tezos NFTs when users pay via the x402 protocol. Returns 402 Payment Required until a valid payment is received, then mints an NFT receipt to the payer.

Features

• x402 payment protocol integration
• FA2-compliant NFT minting via Taquito
• Dynamic SVG receipt generation
• IPFS metadata storage via Pinata

Prerequisites

1. LIGO compiler - For compiling the NFT contract
2. Cloudflare account - For deploying the worker
3. Pinata account - For IPFS uploads (pinata.cloud)
4. Tezos wallet - Funded account for minting operations

Deploy

cd mint/worker
npm install
npm run deploy

Secrets

wrangler secret put TEZOS_RPC_URL      # e.g., https://shadownet.tezos.ecadinfra.com
wrangler secret put MINTER_PRIVATE_KEY # edsk...
wrangler secret put NFT_CONTRACT       # KT1...
wrangler secret put PAYMENT_RECIPIENT  # tz1...
wrangler secret put PINATA_JWT         # eyJ...

Configuration

Edit wrangler.jsonc:

{
  "vars": {
    "NETWORK": "shadownet",
    "PAYMENT_AMOUNT": "100000"  // 0.1 XTZ in mutez
  },
  "services": [
    { "binding": "FACILITATOR", "service": "tezos-x402-facilitator" }
  ]
}

The mint worker uses a service binding to call the facilitator directly (no public URL needed).

API

GET /mint or POST /mint - Mint an NFT after x402 payment

Query Parameters:

• recipient (optional) - Address to receive the NFT (defaults to payer)

Without payment (returns 402):

{
  "x402Version": 1,
  "paymentRequirements": [{
    "scheme": "exact-tezos",
    "network": "shadownet",
    "asset": "XTZ",
    "amount": "100000",
    "recipient": "tz1..."
  }]
}

With valid payment (returns 200):

{
  "success": true,
  "nft": {
    "tokenId": 42,
    "contract": "KT1...",
    "recipient": "tz1...",
    "metadataUri": "ipfs://Qm...",
    "opHash": "oo..."
  }
}

GET / or GET /health - Health check

Error Codes

Code	Description
NO_PAYMENT	No X-PAYMENT header provided
INVALID_PAYMENT	Payment verification failed
WRONG_NETWORK	Payment network doesn't match
IPFS_UPLOAD_FAILED	Failed to upload metadata to Pinata
MINT_FAILED	NFT contract call failed
SETTLE_FAILED	Payment settlement failed

---

Architecture

┌──────────────────┐
│   Client/Agent   │
└────────┬─────────┘
         │ 1. GET /mint
         ▼
┌──────────────────┐
│  Mint Worker     │
└────────┬─────────┘
         │ 2. Return 402 with payment requirements
         ▼
┌──────────────────┐
│   Client/Agent   │
└────────┬─────────┘
         │ 3. Sign payment, retry with X-PAYMENT header
         ▼
┌──────────────────┐     ┌──────────────────┐
│  Mint Worker     │────▶│   Facilitator    │
└────────┬─────────┘     │   (verify)       │
         │               └──────────────────┘
         │ 4. Verified
    ┌────┴────┐
    ▼         ▼
┌────────┐ ┌────────┐
│ Pinata │ │ Tezos  │
│ (IPFS) │ │ (mint) │
└────────┘ └────────┘
         │
         │ 5. Return NFT details
         ▼
┌──────────────────┐     ┌──────────────────┐
│   Client/Agent   │     │   Facilitator    │
└──────────────────┘     │   (settle)       │
                         └──────────────────┘

License

Apache-2.0