Fee Now — Bitcoin fee forecast
https://hexbox-fees.hexboxtools.workers.dev/api/v1/forecastOverview
Best-time-to-send Bitcoin fee forecast for AI agents. Returns JSON with send_now/wait/economy recommendation, 24h fee history context, mempool depth, and sats-saved example for a typical send. Free live fees at /api/fees. Discovery: /llms.txt, /openapi.json, /api/agent.json. Pay 21 sats Lightning L402: GET returns 402 with macaroon+invoice, pay, retry with Authorization L402 macaroon:preimage. Operator: Hexbox Tools. No KYC.