Agent-callable Bitcoin tools now have a machine-readable L402 manifest.

Discover:
https://mcp.loopxxi.com/.well-known/l402-manifest.json

Pay per request:
• BTC price: 10 sats
• send-or-wait decision: 15 sats
• optimal send window: 25 sats

No account. No API key. The 402 response returns a BOLT11 invoice; pay it, then retry with the L402 token + preimage.

Built for autonomous buyers.