{"uid":"cap_4U7owZqAj-qoYXZi3lEAR","slug":"erc1155-balance-for-one-owner-and-token-id-64ece068","name":"ERC1155 Balance for One Owner and Token ID","description":"ERC1155 balance for one owner and token id — Genesis402 / UnyKorn Operator Network","url":"https://twin.unykorn.org/erc1155-balance?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"params":{"type":"object","properties":{"chain":{"enum":["ethereum","base","polygon","arbitrum","optimism","bsc","avalanche","gnosis","linea","scroll"],"type":"string"},"owner":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"},"tokenId":{"type":"integer","minimum":0},"contract":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"type":"erc1155-balance","receipt":{"tx_hash":"0x<64hex>","amount_usd":0.003,"receipt_id":"g402-<16hex>"},"generated_at":"<iso8601>"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Age8a6mUojHzONH5ov1WI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the balance of a specific ERC1155 token ID held by a given owner address on a supported EVM chain","exampleAgentPrompt":"What is the ERC1155 balance for owner 0xAbC1234567890AbC1234567890AbC1234567890Ab on contract 0xDef9876543210DeF9876543210DeF9876543210dE for token ID 42 on Base?","exampleUseCases":[{"title":"Gaming item ownership check","prompt":"How many of token ID 5 does wallet 0xAbC1234567890AbC1234567890AbC1234567890Ab hold in the ERC1155 contract 0xDef9876543210DeF9876543210DeF9876543210dE on Polygon? I need to know if they qualify for a game event."},{"title":"NFT airdrop eligibility verification","prompt":"Can you check if 0x1111222233334444555566667777888899990000 owns any of token ID 100 in the ERC1155 contract 0xAAAABBBBCCCCDDDDEEEEFFFF0000111122223333 on Ethereum? I want to verify they're eligible for an airdrop."},{"title":"Multi-chain semi-fungible balance audit","prompt":"Tell me the ERC1155 balance for token ID 7 owned by 0xDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF in contract 0xCAFEBABECAFEBABECAFEBABECAFEBABECAFEBABE on Arbitrum — I'm auditing their holdings."}],"resultDescription":"Returns a JSON object with ok status, the balance (implicitly via the type 'erc1155-balance'), a payment receipt including tx hash, USD amount paid, and receipt ID, plus a generated_at ISO8601 timestamp. Note: the example response schema shows receipt metadata but the actual token balance value would be included in the full response body.","failureModes":["Invalid owner or contract address (not matching 0x + 40 hex chars) returns validation error","Unsupported chain name outside the allowed enum returns error","Token ID below 0 returns schema validation error","Contract address that is not a deployed ERC1155 contract may return zero or error","Network RPC timeouts may cause delayed or failed responses","Insufficient x402 payment causes 402 Payment Required rejection"],"whenToPreferThis":"Choose this endpoint when you need to query the balance of a specific ERC1155 token ID for a single owner on one of the ten supported EVM chains (Ethereum, Base, Polygon, Arbitrum, Optimism, BSC, Avalanche, Gnosis, Linea, Scroll). It is a pay-per-call API ideal for agents that need on-demand, real-time ERC1155 balance lookups without managing their own RPC infrastructure. Prefer it over general-purpose RPC calls when you want a simple REST interface with built-in payment receipts.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T18:55:39.870Z","isFirstParty":false,"canonicalSlug":"erc1155-balance-for-one-owner-and-token-id-64ece068"}