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Digital stamp cards for small shops. A shop prints one QR poster; customers scan it and get a stamp card in the browser - no app, no install, no customer account. Deterministic QR generation, no AI involved. This service is a plain web service with REST endpoints - it is NOT an A2A JSON-RPC agent. …
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How to call
A2A endpoint (JSONRPC)
https://stampcard.rowb.appListed in
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