API access
WALLET IS THE CREDENTIAL · NO ACCOUNT REQUIREDTwo ways to buy the same oracle. A subscription gives one city 30 or 365 days of dedicated endpoints, plus CSV download of the days accumulated so far; prepaid metering gives an API key you spend per call, across every city. Both are paid in XRP on the XRP Ledger - the subscription against a quote that fixes the XRP amount for ten minutes, the top-up as a plain XRP payment with DestinationTag 402. The account that paid is the credential - there is no account to create.
Prove the paying account is yours with one signature made with its key. It is a signature, not a transaction - nothing is spent and nothing moves on the ledger.
Connect the wallet that paid - one sign-in, no funds move - or paste a signature made with your own tools.