Current owner of an ERC-721 token id on 16 EVM chains, with collection name and
Current owner of an ERC-721 token id on 16 EVM chains, with collection name and symbol, and detection of unminted or burned tokens.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
314 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/chain/nft-owner
| Category | Market data |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 314 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"collection": "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D",
"token_id": "1"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"type": "string"
},
"collection": {
"description": "the ERC-721 collection contract",
"type": "string"
},
"token_id": {
"description": "the token id (decimal or 0x hex)",
"type": "string"
}
},
"required": [
"chain",
"collection",
"token_id"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chain": {
"description": "the chain name that was queried",
"type": "string"
},
"chain_id": {
"description": "EIP-155 chain id of that network",
"type": "number"
},
"collection": {
"description": "the ERC-721 contract",
"type": "string"
},
"exists": {
"description": "false when ownerOf reverts (never minted or burned)",
"type": "boolean"
},
"is_burn_address": {
"description": "true when the owner is a zero or dead address",
"type": "boolean"
},
"name": {
"description": "collection name",
"type": [
"string",
"null"
]
},
"note": {
"description": "how to read the result",
"type": "string"
},
"owner": {
"description": "current owner address, null when the token does not exist",
"type": [
"string",
"null"
]
},
"source": {
"description": "where the data was read from",
"type": "string"
},
"symbol": {
"description": "collection symbol",
"type": [
"string",
"null"
]
},
"token_id": {
"description": "token id in decimal",
"type": "string"
}
},
"required": [
"chain",
"chain_id",
"collection",
"token_id",
"exists",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}