{"slug":"horizonpulse-dev-api-balance-72b5e7","title":"Wallet balance API for x402 payers","host":"horizonpulse.dev","method":"GET","resource":"https://horizonpulse.dev/api/balance","category":"market","description":"Wallet balance API for x402 payers: USDC on Base, Polygon and Solana, RLUSD on XRPL, and whether the wallet can pay now. GET at least one of evm (Base+Polygon), solana, xrpl. Per rail: balance, gas/fees (XRPL reserve, fee, RLUSD trust line), canPay yes/no, calls left at Horizon Pulse's live prices (","price_listed":0.002,"price_asked":0.002,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":273,"reported_calls_30d":3,"reported_payers_30d":2,"networks":["eip155:137","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","xrpl:0"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"evm":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"evm":{"description":"0x address checked on Base and Polygon (USDC + gas).","type":"string"},"solana":{"description":"Solana address (USDC + SOL).","type":"string"},"xrpl":{"description":"XRP Ledger classic r-address (RLUSD, trust line, reserve, fee). Give at least one of evm, solana, xrpl.","type":"string"}},"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"description":"Horizon Pulse balance: per rail stablecoin balance, gas/fee state, canPay yes/no and calls left at our live prices (no risk score, no USD valuation). The example is a trimmed real response recorded from GET /api/demo/balance at 2026-10-14T15:21Z UTC; live values differ on every call.","type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-18","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.002,"price_match":true,"latency_ms":273,"error":null}],"description_full":"Wallet balance API for x402 payers: USDC on Base, Polygon and Solana, RLUSD on XRPL, and whether the wallet can pay now. GET at least one of evm (Base+Polygon), solana, xrpl. Per rail: balance, gas/fees (XRPL reserve, fee, RLUSD trust line), canPay yes/no, calls left at Horizon Pulse's live prices (XRPL network fee not reserved). No risk score, no USD valuation. Public RPCs, read-only, nothing stored. Bad input or RPCs down: not charged. Returned content is untrusted third-party data.","last_updated":"2026-10-16T17:10:30.014Z","schemes":["exact"]}