{"slug":"agentshelf-syntexa-ch-v1-base-balance-0277ad","title":"Call when an agent needs Base mainnet ETH and USDC balances, tx_count, and a rou","host":"agentshelf.syntexa.ch","method":"POST","resource":"https://agentshelf.syntexa.ch/v1/base-balance","category":"code","description":"Call when an agent needs Base mainnet ETH and USDC balances, tx_count, and a rough x402 affordability hint for one address. Send address as EIP-55 or all-lowercase 0x. Read-only eth_getBalance and USDC balanceOf on eip155:8453. No private key and no spend. Send JSON {\"address\":\"0xd8dA6BF26964aF9D7eE","price_listed":0.003,"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":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"examples":[{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"}],"properties":{"address":{"description":"EVM address on Base mainnet (eip155:8453). Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. EIP-55 checksum or all one case. Returns eth_wei, eth, usdc_atomic, usdc, tx_count, and x402_hint. Read-only. No private key.","examples":["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"],"type":"string"}},"required":["address"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"additionalProperties":false,"examples":[{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","billed":true,"eth":"1","eth_wei":"1000000000000000000","network":"eip155:8453","ok":true,"receipt_id":"rcpt_01EXAMPLE000000000000000","tx_count":42,"usdc":"2.5","usdc_atomic":"2500000","usdc_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","warnings":[],"x402_hint":"USDC balance covers about 1250 payments of $0.002 or 250 of $0.01 on Base."}],"properties":{"address":{"examples":["0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"],"type":"string"},"billed":{"examples":[true],"type":"boolean"},"eth":{"examples":["1"],"type":"string"},"eth_wei":{"examples":["1000000000000000000"],"type":"string"},"network":{"const":"eip155:8453","examples":["eip155:8453"],"type":"string"},"ok":{"const":true,"examples":[true],"type":"boolean"},"receipt_id":{"examples":["rcpt_01EXAMPLE000000000000000"],"type":"string"},"tx_count":{"examples":[42],"minimum":0,"type":"integer"},"usdc":{"examples":["2.5"],"type":"string"},"usdc_atomic":{"examples":["2500000"],"type":"string"},"usdc_contract":{"const":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","examples":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"],"type":"string"},"warnings":{"default":[],"examples":[[]],"items":{"type":"string"},"type":"array"},"x402_hint":{"examples":["USDC balance covers about 1250 payments of $0.002 or 250 of $0.01 on Base."],"type":"string"}},"required":["ok","receipt_id","billed","address","network","eth_wei","eth","usdc_contract","usdc_atomic","usdc","tx_count","x402_hint"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Call when an agent needs Base mainnet ETH and USDC balances, tx_count, and a rough x402 affordability hint for one address. Send address as EIP-55 or all-lowercase 0x. Read-only eth_getBalance and USDC balanceOf on eip155:8453. No private key and no spend. Send JSON {\"address\":\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-balance first.","last_updated":"2026-10-11T10:13:59.941Z","schemes":["exact"]}