api.onesource.io
List every ERC721 NFT token_id a wallet owns in a collection via tokenOfOwnerByIndex (eth_call)
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 375 ms
- Price
- $0.008 per call
- Paying buyers, last 30 days
- 262 (directory's own records)
- Paid calls, last 30 days
- 262
- Category
- Blockchain reads
- Address
- https://api.onesource.io/api/chain/erc721-tokens
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/cc745048ef74.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).