Use when you need which token ids of an ERC-721 collection an address owns on Ba
Use when you need which token ids of an ERC-721 collection an address owns on Base, Ethereum, Arbitrum, Optimism or Polygon. Works for enumerable collections (tokenOfOwnerByIndex); returns up to 50 ids per page with the total balance, and says when the collection is not enumerable.
Answeringour last check, 2026-09-25
1 of 1checks answered this week
1264 msmedian answer time
$0.002listed price per call
$0.002price 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://biosfera.46-62-215-147.sslip.io/o/erc721-tokens-of-owner
| Category | Market data |
|---|---|
| Provider host | biosfera.46-62-215-147.sslip.io |
| Networks | eip155:137, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-25 | valid payment request | 402 | $0.002 | 1264 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"address": "0x000000000000000000000000000000000000dEaD",
"chain": "ethereum",
"contract": "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"address": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon"
],
"type": "string"
},
"contract": {
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"offset": {
"maximum": 100000,
"minimum": 0,
"type": "integer"
}
},
"required": [
"chain",
"contract",
"address"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}