BittensorMCP

Live, self-custodial Bittensor chain access for AI agents via MCP.

What is BittensorMCP?

BittensorMCP is a hosted Model Context Protocol (MCP) server that gives AI agents live access to the Bittensor blockchain. Connect any MCP client — Claude, Cursor, ChatGPT, VS Code, Windsurf, Zed, Codex — and query balances, subnets, metagraphs, validators, and Alpha prices in real time.

Free reads: 17 tools, no signup, no API key
Premium writes: 17 on-chain actions (stake, transfer, register, weights) via self-custodial signing
One endpoint: https://bittensormcp.com/api/mcp with Streamable HTTP transport

Why self-custodial?

Your private key never leaves your device.

BittensorMCP uses an A2 two-step signing protocol: the server returns an UNSIGNED_PAYLOAD plus intent_id, you sign it locally with your sr25519 key, and only the signature goes back. The server broadcasts the signed extrinsic — it never sees, stores, or handles your private key.

┌─────────────┐      unsigned payload       ┌─────────────┐
│   Your Key  │  <───────────────────────   │  Bittensor  │
│  (local)    │      sign locally           │    MCP      │
│             │  ───────────────────────>   │   Server    │
└─────────────┘      signature only         └──────┬──────┘
                                                   │
                                            broadcast to
                                                   ▼
                                            ┌─────────────┐
                                            │  Bittensor  │
                                            │   Finney    │
                                            └─────────────┘

Quick start

1. Install the SDK

npm install @bittensormcp/sign

2. Authenticate (self-custody)

import { generateWallet, authenticate } from '@bittensormcp/sign';

const wallet = await generateWallet();
const { token } = await authenticate({
  endpoint: 'https://bittensormcp.com',
  ss58: wallet.ss58,
  signer: wallet.sign
});

3. Connect your MCP client

Claude Code:

claude mcp add --transport http bittensormcp \
  https://bittensormcp.com/api/mcp \
  --header "Authorization: Bearer YOUR_JWT"

Claude Desktop / Cursor / VS Code:

{
  "mcpServers": {
    "bittensormcp": {
      "url": "https://bittensormcp.com/api/mcp",
      "headers": { "Authorization": "Bearer YOUR_JWT" }
    }
  }
}

Clients without native Streamable HTTP:

{
  "mcpServers": {
    "bittensormcp": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://bittensormcp.com/api/mcp",
        "--header", "Authorization:${AUTH_HEADER}"
      ],
      "env": { "AUTH_HEADER": "Bearer YOUR_JWT" }
    }
  }
}

For step-by-step connection instructions for every client, see the Connect Guide.

Tools at a glance

Category	Count	Examples
Free reads	17	`bittensor_balance`, `bittensor_account`, `bittensor_subnet_list`, `bittensor_subnet_metagraph`, `bittensor_validators`, `bittensor_dynamic`, `bittensor_swap_sim`, `bittensor_block`
Premium writes	17	`bittensor_stake_add`, `bittensor_stake_remove`, `bittensor_transfer`, `bittensor_register`, `bittensor_weights_set`, `bittensor_subnet_register`, `bittensor_root_register`

All write tools use the A2 self-custody signing flow. Premium activation requires sending TAO to the treasury address (check bittensor_premium_status for the current rate).

License

MIT