BackPow MCP Server

The official Model Context Protocol server for BackPow — The Proof of Work Oracle.

It gives an AI assistant live mining data for 126+ Proof of Work networks and 770+ hardware models: network difficulty and hashrate, Poisson solo-mining probabilities, Cost of Production, and hardware profitability.

Remote endpoint: https://mcp.backpow.com/mcp — Streamable HTTP, no API key, no account. Local package: @backpow/mcp-server — the same six tools over stdio.

Install

ChatGPT (Custom GPTs & Actions)

Connect BackPow's live PoW data directly to your ChatGPT:

1. In ChatGPT, go to Explore GPTs → + Create (or configure an existing GPT).
2. Under Configure, scroll down to Actions → Create new action.
3. Click Import from URL and paste:
   text

   Copy

   https://mcp.backpow.com/openapi.json
   

4. Click Import. All 6 tools will populate automatically with zero authentication required.

Claude Code

claude mcp add --transport http backpow https://mcp.backpow.com/mcp

Claude Desktop / claude.ai

Settings → Connectors → Add custom connector → https://mcp.backpow.com/mcp

VS Code

{
  "servers": {
    "backpow": { "type": "http", "url": "https://mcp.backpow.com/mcp" }
  }
}

Cursor

Settings → MCP → Add, or in ~/.cursor/mcp.json:

{
  "mcpServers": {
    "backpow": { "url": "https://mcp.backpow.com/mcp" }
  }
}

Local stdio

For clients that run a local process instead of calling a URL. It talks to the same public endpoints as the remote server, so it needs no key either:

{
  "mcpServers": {
    "backpow": { "command": "npx", "args": ["-y", "@backpow/mcp-server"] }
  }
}

Tools

All six are read-only and annotated readOnlyHint, so hosts that support auto-approval will not prompt on every call.

How results are shaped

Every successful result is an envelope:

{
  "warnings": [ /* plain prose caveats that qualify how the figures should be read */ ],
  "source": {
    "as_of_utc": "2026-09-18T08:12:00Z",
    "data_age_seconds": 30,
    "served_from": "live",
    "url": "https://backpow.com/Bitcoin",
    "cite_as": "BackPow — The Proof of Work Oracle, \"BTC solo mining odds\", retrieved 2026-09-18 — https://backpow.com/Bitcoin",
    "methodology": "…"
  },
  "data": { /* the figures */ }
}

Difficulty, hashrate and price move continuously, so a figure only means something alongside the moment it was measured. Every result therefore carries its measurement timestamp and a ready-made citation line.

Two deliberate behaviours worth knowing:

• Ambiguity is refused, not guessed. Several tickers are shared by multiple tracked chains (DGB by 5, XVG by 5). get_coin_oracle {"coin_id": "DGB"} returns an error listing the candidates rather than picking one, so an answer is never about a different network than the caller meant.
• An unavailable measurement is refused, not substituted. When a network's current state cannot be measured, the tool returns an error rather than a placeholder such as 0 H/s, which a caller could not tell apart from a real reading.

Data and licence

Figures derive from BackPow's stratum collector nodes and market data, and are published under CC BY 4.0 — see backpow.com/llms.txt. Citation is requested, permission is not required.

This is a calculator and data source, not financial advice. No tool executes a transaction.

Development

Node 22 or newer is required: the Cloudflare Workers toolchain needs it. The published package itself runs on Node 20 and above.

npm install
npm run typecheck     # tsc --noEmit
npm test              # unit + integration, no network
npm run dev           # wrangler dev on :8787
npm run conformance -- http://127.0.0.1:8787   # protocol probe against a running server
npm run deploy        # Cloudflare Workers

scripts/conformance.mjs drives a live endpoint through the transport and security behaviours that only show up over a real HTTP connection: status codes, header negotiation, origin checks and protocol-version handling. Point it at a local wrangler dev instance, or at the deployed endpoint.

Transport

Streamable HTTP on a single endpoint, POST /mcp. The server is stateless: it mints no session ids, GET and DELETE answer 405, and notifications get 202 with no body. Protocol revisions 2025-11-25 through 2024-11-05 are negotiated at initialize; server/discover reports the supported set.

/sse and /message, the paths of the deprecated HTTP+SSE transport, answer 410 pointing at /mcp.

Licence

MIT — see LICENSE.