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TraceFast Address Attribute Proof
x402
TraceFast Address Attribute Proof is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-19).
Returns the knowledge-graph evidence behind one proven attribute of an Ethereum address — facts checked, expected vs. observed values, falsified conditions, sources, and the pinned block.
Price / call$0.025
Success—
StatusUnknown
How this service works
TraceFast knowledge graph: the evidence behind one proven attribute of an address — the facts that were checked with their expected and observed values, the conditions that had to be false, the sources the evidence was read from, and the block the evaluation was pinned to. Path address: The address, `0x`-prefixed, 40 hex characters, any case; attribute_id: The attribute id, `family:name`, as listed by the attributes method. Docs: https://docs.tracefast.xyz/api/address-attribute-proof.md
Output
A knowledge-graph proof object containing: the list of facts that were checked (each with expected and observed values), the conditions that had to be false for the attribute to hold, the source references the evidence was read from, and the Ethereum block number at which the evaluation was pinned.
Example use cases
Audit address entity classification
“Pull the TraceFast proof for Ethereum address 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 and attribute entity:is_contract so I can audit exactly which facts were checked and which sources were used to reach that conclusion.”
Verify exchange label provenance
“I need to verify how TraceFast determined that 0x28C6c06298d514Db089934071355E5743bf21d60 has the attribute entity:exchange — show me the expected and observed values and all the evidence sources used.”
Cross-check falsified conditions for compliance
“For compliance review, retrieve the TraceFast attribute proof for address 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD with attribute risk:mixer — I specifically need to see which conditions had to be false and what block number the evaluation was pinned to.”
Technical details
Endpoint
GEThttps://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/attributes/:attribute_id/proof?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to understand the evidence and provenance behind a specific TraceFast address attribute — not just the attribute value itself, but the facts checked, the sources consulted, and the block at which it was evaluated. Prefer this over the general attributes listing endpoint when doing compliance audits, provenance tracing, or when you need to challenge or validate a specific classification.
Side effects
- Address not found or not indexed — 404 with no proof available
- Invalid address format (not 0x-prefixed 40 hex chars) — 400 bad request
- Unknown attribute_id not listed by attributes method — 400 or 404
- Attribute exists but has not been proven for this address — empty or null proof response
- Payment not completed (x402 protocol failure) — 402 Payment Required
- Network timeout or upstream chain node unavailable — 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Tags
x402
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