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Never charged when the seller fails.","how":"POST https://rooms.aurmada.com/x402/v1/broker/dt0uronline with JSON {\"path\": \"optional\", \"method\": \"GET|POST\", \"query\": {}, \"body\": {}}; it answers 402 with the all-in price."},"transport":"http","skills":[{"id":"/api/onchain/tx","name":"POST /api/onchain/tx","description":"Look up a transaction by hash on base, ethereum, arbitrum, optimism, polygon, bsc: status (success/reverted/pending), block and timestamp, from/to, value, gas used, fee in native coin and USD, method selector, created contract, and decoded…","tags":["$0.01","Base"]},{"id":"/api/onchain/contract","name":"POST /api/onchain/contract","description":"Classify any address on base, ethereum, arbitrum, optimism, polygon, bsc: wallet (EOA, incl. 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