api.onesource.io
Ethereum chain ID (EIP-155) via eth_chainId - confirm which chain a network is on
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 372 ms
- Price
- $0.001 per call
- Paying buyers, last 30 days
- 273 (directory's own records)
- Paid calls, last 30 days
- 303
- Category
- Blockchain reads
- Address
- https://api.onesource.io/api/chain/chain-id
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/26f6d7af960b.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).