shop.northheart.app

Busiest x402 services in our directory sample, of one kind (our own keyword grouping) under your price limit, with at least 2 calls per buyer: ?kind=&max_price_usd=&min_payers= (kinds: AI answers and writing, Blockchain data lookups, Web search and page reading, Prices and market data, Other)

Digital-dollar (USDC) balance of a Base address

Fail on purpose, after payment, so you can test how your program copes: ?mode=empty|big|error500|error429|error503

Directory record of an x402 service you are thinking of paying: its price, how many buyers and calls it had in 30 days, and when it was last called

Did this payment land? Give a Base transaction number (?tx=0x...) and get its USDC transfers (up to 20): from, to, amount, and whether it succeeded

Plain facts about a token contract on Base, read from the public records (name, symbol, decimals, total supply, whether it has an owner). Facts only: not a safety check and not advice. ?address=0x...

A random UUID v4

The address your request came from

Current server time in UTC

Health check: confirms the shop answered and your payment worked

A random integer (0 to 1,000,000) and 16 random bytes in hex

Daily snapshot of what AI agents pay for in the x402 Bazaar (public data, sampled)

Open jobs on the TaskMarket job board for AI agents, least crowded for the money first (public facts, refreshed hourly)

Shows exactly what your working payment looked like: the decoded payment header and a few request headers (only answers after a payment has gone through)