Buy inference by the token. No subscription. No account.

from openai import OpenAI

client = OpenAI(
    base_url="https://inference.bsvkey.com/v1",   # the only change
    api_key="<channelId>:<channelSecret>",           # your BSV channel
)

resp = client.chat.completions.create(
    model="auto",                                   # or a specific model
    messages=[{"role": "user", "content": "Explain per-token billing."}],
)

print(resp.choices[0].message.content)
print(resp.x_bsv["charge"])   # {totalSats, wholesaleSats, marginSats, rakeSats}

# Claude Code — one line:
claude mcp add bsvkey-inference --env BSVKEY_API_KEY=<channelId>:<channelSecret> -- npx -y @bsvkey/inference-mcp

# or any MCP host (Claude Desktop, Codex, ...) — mcp.json:
{
  "mcpServers": {
    "bsvkey-inference": {
      "command": "npx",
      "args": ["-y", "@bsvkey/inference-mcp"],
      "env": { "BSVKEY_API_KEY": "<channelId>:<channelSecret>" }
    }
  }
}

# install the BSV x402 payment builder
npm i @bsvkey/x402-bsv-client @bsv/sdk

// pay for one inference in BSV — the 402 handshake is handled for you
import { fetchWithX402, readSettlement } from '@bsvkey/x402-bsv-client';

const res = await fetchWithX402(
  'https://inference.bsvkey.com/v1/x402/chat/completions',
  { method: 'POST', headers: { 'content-type': 'application/json' },
    body: JSON.stringify({ model: 'grok-4.3', messages: [{ role: 'user', content: 'Say hi in 3 words' }] }) },
  { wif: process.env.BSV_WIF }        // a funded BSV key — pays the quoted sats
);

const data = await res.json();
console.log(data.choices[0].message.content);   // the answer
console.log(readSettlement(res));               // { success, transaction: <on-chain txid>, ... }

# drop-in gateway — front any existing API, no code changes to it
npm i @bsvkey/x402-paywall

import { createPaywallServer } from '@bsvkey/x402-paywall';

createPaywallServer({
  origin: 'https://your-api.example',   // your existing API, untouched
  payTo: '<your BSV address>',          // where the money lands — you keep 100%
  priceUsd: 0.002,                        // per call, USD-pinned, settled in BSV
}).listen(8080);
// http://localhost:8080/* is now your API, paywalled in BSV.

# publish this broker's offer to the overlay topic
$ npm run advertise
→ Published offer to topic tm_bsv_inference

# any client resolves the topic to find live offers
$ npm run discover
• BSV Inference Broker  (mainnet)
  endpoint: https://inference.bsvkey.com/v1/chat/completions
  markup:   0.9   service fee → 1LdqUbdZ…82cv
  models:   claude-sonnet-5@114,151sat/1k, claude-haiku-4-5@57,076sat/1k …