{"slug":"kr-x402-mvp-kgy5612-workers-dev-crypto-decode-calldata-dac350","title":"What am I about to sign?","host":"kr-x402-mvp.kgy5612.workers.dev","method":"GET","resource":"https://kr-x402-mvp.kgy5612.workers.dev/crypto/decode-calldata","category":"market","description":"What am I about to sign? Pre-sign calldata decoder for Base: data=0x.. (selector+args) [&to=0x.. token/contract for symbol+decimals] or hash=0x.. (decode an existing tx). Resolves the 4-byte selector (builtin + openchain + 4byte, collision-checked by ABI round-trip), returns function signature, type","price_listed":0.002,"price_asked":0.002,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":28,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"data":"0x095ea7b3000000000000000000000000000000000022d473030f116ddee9f6b43ac78ba3ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff","to":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"additionalProperties":false,"properties":{"data":{"description":"Calldata hex (selector + ABI args). Required unless hash given","examples":["0x095ea7b3000000000000000000000000000000000022d473030f116ddee9f6b43ac78ba3ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"],"pattern":"^0x[0-9a-fA-F]{8,}$","type":"string"},"hash":{"description":"Optional Base tx hash: decode its input instead of data","pattern":"^0x[0-9a-fA-F]{64}$","type":"string"},"to":{"description":"Optional target contract (token) for symbol/decimals + label","pattern":"^0x[0-9a-fA-F]{40}$","type":"string"}},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-31","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.002,"price_match":true,"latency_ms":28,"error":null}],"description_full":"What am I about to sign? Pre-sign calldata decoder for Base: data=0x.. (selector+args) [&to=0x.. token/contract for symbol+decimals] or hash=0x.. (decode an existing tx). Resolves the 4-byte selector (builtin + openchain + 4byte, collision-checked by ABI round-trip), returns function signature, typed args, plain-English summary, risk none|low|medium|high, flags (unlimited_approval, unknown_spender, approve_all_nfts, offchain_permit, permit2_allowance, batched_calls, inner_approval,...","last_updated":"2026-10-30T01:30:33.709Z","schemes":["exact"]}