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@bsvkey/inference-mcp

An MCP server that lets any agent buy Claude & Grok inference metered per token, settled in BSV, through the hosted gateway at inference.bsvkey.com. Zero dependencies (Node ≥ 18, uses global fetch). It's a thin HTTP client — it never holds your keys or runs models; every call is billed through the gateway.

Tools: list_models, infer, channel_balance, open_channel, x402_infer.

Two ways to pay: a prepaid channel (infer, fund once, draw down per token) or per call via x402 (x402_infer — no channel; the agent pays each request in BSV with its own key). x402_infer needs a funded WIF (wif arg or BSVKEY_WIF) and the optional @bsvkey/x402-bsv-client + @bsv/sdk packages (installed with this one).

Verifiable metering. Each infer call returns a signed usage receipt, and the tool auto-verifies it offline (with the optional packages installed): the result includes receiptVerified and meterVerified (true, false + receiptCheck, or null if the verifier isn't installed). It recovers the broker key (pinned from GET /v1/receipt-key); checks channel binding, a monotonic sequence (no replay/gap), and running totals within the funded amount; recomputes the charge from the published rate (you can never be overcharged); and recomputes the token count from the exact bytes of your system/prompt and the completion, under the pinned bsvkey-meter/1 tokenizer. So the channel payment is on-chain and both the meter and the charge are auditable, without trusting the broker's word. Spec: https://inference.bsvkey.com/usage-receipts.md

Quick start

  1. Fund a channel once at https://inference.bsvkey.com (BRC-100 wallet, or load a key in-page). Copy the key it returns: channelId:channelSecret.
  2. Add the MCP server to your agent host (below), with that key in BSVKEY_API_KEY.
  3. Ask your agent to run inference — it calls infer and pays per token.

list_models and open_channel work with no key; infer and channel_balance need a funded channel key.

Install

Published on npm as @bsvkey/inference-mcp.

Claude Code

claude mcp add bsvkey-inference \
  --env BSVKEY_API_KEY=channelId:channelSecret \
  -- npx -y @bsvkey/inference-mcp

Claude Desktop / Codex / any MCP host (JSON config)

{
  "mcpServers": {
    "bsvkey-inference": {
      "command": "npx",
      "args": ["-y", "@bsvkey/inference-mcp"],
      "env": { "BSVKEY_API_KEY": "channelId:channelSecret" }
    }
  }
}

No npm? Grab the single-file server directly (https://inference.bsvkey.com/mcp/server.js) and use "command": "node", "args": ["server.js"].

Configuration (env)

Var Default Meaning
BSVKEY_BASE_URL https://inference.bsvkey.com/v1 Gateway base URL (set to a self-hosted deployment if you run your own).
BSVKEY_API_KEY — channelId:channelSecret for a funded channel. Optional; can also be passed per call as apiKey.

Verify it's wired (no key needed)

printf '%s\n' \
  '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}' \
  '{"jsonrpc":"2.0","id":2,"method":"tools/list","params":{}}' \
  '{"jsonrpc":"2.0","id":3,"method":"tools/call","params":{"name":"list_models","arguments":{}}}' \
  | node server.js

Marketplace listing blurb

BSV Inference — Pay-per-token Claude & Grok, settled in BSV. Prepay a channel once, then meter every token with no subscription, account, or card. OpenAI- compatible, optional live web search, on-chain settlement. MCP + portable SKILL.md.

Publishing (operator)

  • Live on npm under the @bsvkey org (owner: interence). First publish: v1.0.0.
  • To ship an update: bump version in package.json, then npm publish --access public (2FA/security-key prompt applies).
  • Canonical source: https://github.com/BSVKey/inference-mcp
  • To list on a skills marketplace (e.g. bopen.ai), submit SKILL.md + this README.