TraceFast
TraceFast knowledge graph: the attributes an address held at the end of one block, each with the window it held for. Path address: The address, `0x`-prefixed, 40 hex characters, any case. Query block: The block to answer about. Docs: https:
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 376 ms
- Price
- $0.050 per call
- Paying buyers, last 30 days
- 2 (directory's own records)
- Paid calls, last 30 days
- 2
- Category
- Unclassified
- Address
- https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/attributes/at-block
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/2cb4fe0e7353.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).