{"slug":"ari001-tailb4ac3a-ts-net-v1-ventures-ethereum-contract-abi-s-8de93a","title":"Base ERC-20 approval check","host":"ari001.tailb4ac3a.ts.net","method":"GET","resource":"https://ari001.tailb4ac3a.ts.net/v1/ventures/ethereum_contract_abi_service/wallet_approval_audit_base","category":"market","description":"Base ERC-20 approval check: returns the current allowance a spender holds over an owner's tokens, read live via allowance(owner, spender) on the token contract on Base. Takes token (0x + 40 hex), owner (0x + 40 hex), spender (0x + 40 hex). Query: token (ERC-20 contract, 0x + 40 hex), owner (0x + 40 ","price_listed":0.003,"price_asked":0.003,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":3888,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:137","eip155:42161","eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"owner":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","spender":"0x000000000022D473030F116dDEE9F6B43aC78BA3","token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"properties":{"owner":{"description":"0x + 40 hex","pattern":"^0x[a-fA-F0-9]{40}$","type":"string"},"spender":{"description":"0x + 40 hex","pattern":"^0x[a-fA-F0-9]{40}$","type":"string"},"token":{"description":"ERC-20 contract, 0x + 40 hex","pattern":"^0x[a-fA-F0-9]{40}$","type":"string"}},"required":["token","owner","spender"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"chain":{"type":"string"},"error":{"description":"present when ok is false","type":"string"},"method":{"type":"string"},"ok":{"type":"boolean"},"result":{"description":"the uint256 as a decimal string","type":"string"},"service":{"type":"string"}},"required":["ok","service"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-26","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.003,"price_match":true,"latency_ms":3888,"error":null}],"description_full":"Base ERC-20 approval check: returns the current allowance a spender holds over an owner's tokens, read live via allowance(owner, spender) on the token contract on Base. Takes token (0x + 40 hex), owner (0x + 40 hex), spender (0x + 40 hex). Query: token (ERC-20 contract, 0x + 40 hex), owner (0x + 40 hex), spender (0x + 40 hex).","last_updated":"2026-09-25T22:27:56.473Z","schemes":["exact"]}