{"uid":"cap_ZTAiOsImUIFsTjEnqTmN9","slug":"synthora-erc-20-token-balance-lookup-3306a89c","name":"SYNTHORA ERC-20 Token Balance Lookup","description":"ERC-20 token balance for a holder via balanceOf. Deterministic, Ed25519-signed.","url":"https://rpc-erc20-balance.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","required":["token","address"],"properties":{"chain":{"type":"string","description":"chain"},"token":{"type":"string","description":"token"},"address":{"type":"string","description":"address"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_G49fQxXw7zPmALZpPr7eP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches the ERC-20 token balance of a given wallet address on a specified chain using the standard balanceOf call, returning a deterministic Ed25519-signed result.","exampleAgentPrompt":"What's the current USDC balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base — I need the signed result I can verify cryptographically.","exampleUseCases":null,"resultDescription":"Returns the ERC-20 token balance for the specified holder address on the given chain, deterministically computed from on-chain balanceOf, and signed with Ed25519 for verifiability.","failureModes":["Invalid or malformed wallet address returns an error response","Unsupported chain identifier causes lookup failure","Token contract address not found or not a valid ERC-20 results in error","Upstream RPC node failure — no charge applied per service policy","Missing required fields (chain, token, address) causes validation error"],"whenToPreferThis":"Choose this endpoint when you need a cryptographically signed (Ed25519), verifiable ERC-20 token balance that can be audited or passed to downstream verification logic. Prefer it over raw RPC calls when you want a trustless, signed attestation of a balance rather than a raw unsigned JSON-RPC response. Well-suited for agents operating on Base or other EVM chains needing low-cost ($0.003 USDC) on-chain balance lookups with payment via x402 protocol.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:36:27.669Z","isFirstParty":false}