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ERC1155 Balance for One Owner and Token ID
x402
ERC1155 Balance for One Owner and Token ID is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Returns the balance of a specific ERC1155 token ID held by a given owner address on a supported EVM chain
Price / call$0.003
Success—
StatusUnknown
How this service works
ERC1155 balance for one owner and token id — Genesis402 / UnyKorn Operator Network
Output
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.
Example use cases
Gaming item ownership check
“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.”
NFT airdrop eligibility verification
“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.”
Multi-chain semi-fungible balance audit
“Tell me the ERC1155 balance for token ID 7 owned by 0xDEADBEEFDEADBEEFDEADBEEFDEADBEEFDEADBEEF in contract 0xCAFEBABECAFEBABECAFEBABECAFEBABECAFEBABE on Arbitrum — I'm auditing their holdings.”
Technical details
Endpoint
POSThttps://twin.unykorn.org/erc1155-balance?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "erc1155-balance",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.003,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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