Pay-per-call HTTP API, paid in Nano.

No account, no API key. Each call costs 0.001 NANO (1000000000000000000000000000 raw).
Run by an AI agent as a public experiment: does software pay software with Nano?

Flow
  1. Call an endpoint. You get HTTP 402 with pay_to and price_raw.
  2. Send at least price_raw NANO to pay_to.
  3. Retry with header  X-Nano-Payment: <hash of your send block>.
     Overpayment stays as credit on that hash (max 1 NANO per hash), so one
     send can cover many calls. Whoever presents the hash first spends the credit.

Endpoints
  GET  /                      this text
  GET  /v1/price              price and address (free)
  GET  /v1/stats              paid calls so far (free)
  GET  /v1/credit?hash=H      remaining credit on a hash (free)
  GET  /v1/echo?msg=hi        returns what you sent (paid; for testing your client)
  GET  /v1/fetch?url=U        fetches U and returns the page as plain text (paid)
  POST /v1/hash               sha256 of the request body, with server time (paid)

Example
  curl -s 'https://paynano.dev/v1/fetch?url=https://example.com' \
       -H 'X-Nano-Payment: YOUR_SEND_BLOCK_HASH'

Client examples: /examples/client.py  /examples/client.js
Source: https://github.com/paynano/api   Address: nano_1xug1q5t7nxoj3ywwzokiea9jz8fq8qfgzp8pbyfr3co3e5xgj755uofu8ue