{"slug":"sendcheck-x402-pennyforge-workers-dev-check-484bbf","title":"SendCheck","host":"sendcheck-x402.pennyforge.workers.dev","method":"POST","resource":"https://sendcheck-x402.pennyforge.workers.dev/check","category":"market","description":"SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}","price_listed":0.01,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":2,"reported_payers_30d":2,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"address":"0x9504A5939AB5be2B2B1F8beA7D7ebeCcd96c485D","chain":"base"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"address":{"description":"EVM address to verify, 0x + 40 hex characters. Free format pre-check: GET /validate?address=…","type":"string"},"chain":{"description":"Chain to scan (default: base)","enum":["base","ethereum","arbitrum","optimism","polygon"],"type":"string"}},"required":["address"],"type":"object"},"bodyType":{"enum":["json"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"SendCheck: pre-send verification of any EVM address on one chain (EIP-55 checksum, wallet-vs-contract, outgoing activity, balances, verdict). POST {address, chain}","last_updated":"2026-09-14T19:52:37.937Z","schemes":["exact"]}