api.onesource.io
Best-effort contract introspection via batched RPC - bytecode presence, token metadata, and ERC20-like/ERC721/ERC1155 classification
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 372 ms
- Price
- $0.005 per call
- Paying buyers, last 30 days
- 452 (directory's own records)
- Paid calls, last 30 days
- 454
- Category
- Blockchain reads
- Address
- https://api.onesource.io/api/chain/contract/:address
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/cff75287b0b3.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).