Current owner of an ERC-721 token (ownerOf) on Base, Ethereum, Arbitrum or Optim
Current owner of an ERC-721 token (ownerOf) on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM.
Answeringour last check, 2026-10-27
1 of 1checks answered this week
629 msmedian answer time
$0.0025listed price per call
$0.0025price 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://138-197-15-135.sslip.io/v1/nft/owner
| Category | Market data |
|---|---|
| Provider host | 138-197-15-135.sslip.io |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-27 | valid payment request | 402 | $0.0025 | 629 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "base",
"contract": "0x03c4738Ee98aE44591e1A4A4F3CaB6641d95DD9a",
"tokenId": "1"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"queryParams": {
"properties": {
"chain": {
"description": "Chain: base (default), ethereum, arbitrum, optimism",
"type": "string"
},
"contract": {
"description": "NFT contract",
"type": "string"
},
"tokenId": {
"description": "Token id (decimal)",
"type": "string"
}
},
"required": [
"contract",
"tokenId"
],
"type": "object"
}
},
"required": [
"queryParams"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}