# x402.fb — provider console

> Charge FB per call on Fractal. Keep the keys. Hosted facilitator + marketplace for agent payments.

## For providers
- Sign in with UniSat (BIP322)
- Create a service with your Fractal account xpub
- Wrap routes with `requirePayment` from os-x402
- Publish listings to the marketplace (verified live 402)

## Protocol
- Scheme: fb-exact · asset FB · network fractal-mainnet
- Open source SDK + self-hostable facilitator: https://github.com/The-Lonely-Bit/os-x402.fb
- Prefer X-PAYMENT-RAWTX for local settlement verify

## Agent discovery
- Marketplace: https://x402.fractal.thelonelybit.org
- Well-known: https://x402.fractal.api.thelonelybit.org/.well-known/x402
- tools.json: https://x402.fractal.api.thelonelybit.org/v1/tools.json
- discover: https://x402.fractal.api.thelonelybit.org/v1/discover
- scheme: https://x402.fractal.api.thelonelybit.org/v1/scheme/fb-exact
- price: https://x402.fractal.api.thelonelybit.org/v1/price/fb
- BIP-322 verify: https://x402.fractal.api.thelonelybit.org/v1/verify-bip322
- Settlement receipts: https://x402.fractal.api.thelonelybit.org/v1/receipts/:txid
- MCP: https://x402.fractal.api.thelonelybit.org/mcp.json
- Submit listing payload: https://x402.fractal.api.thelonelybit.org/.well-known/x402/submit
- NexumBit Signer (DLC/PSBT): https://github.com/The-Lonely-Bit/Taproot-based_Discreet_Log_Contracts/tree/main/Signer

## Social
- https://x.com/fractal_tlb · https://t.me/fractalbits