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TraceFast Address Attributes at Block
x402
TraceFast Address Attributes at Block is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.025/call, status unknown (last checked 2026-10-18).
Returns the attributes an Ethereum address held at the end of a specific block, along with the window each attribute was held for
Price / call$0.025
Success—
StatusUnknown
How this service works
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://docs.tracefast.xyz/api/address-attributes-at-block.md
Output
A list of attributes associated with the queried Ethereum address as they existed at the end of the specified block, each accompanied by the time window or block range during which the attribute was held. May include entity type classifications, on-chain presence signals, protocol associations, and other knowledge graph labels derived from TraceFast's analytics.
Example use cases
Historical wallet classification lookup
“What was the TraceFast knowledge graph classification for 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 at the end of block 18500000? I want to know what type of entity it was labeled as and how long it had held those attributes.”
Compliance audit at specific block
“For our compliance report, can you pull the address attributes that 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D held at the end of block 17000000? I need to know its entity type and the windows each attribute was active.”
DeFi protocol state at historical block
“I'm researching Uniswap's router at 0xE592427A0AEce92De3Edee1F18E0157C05861564 — can you check what attributes TraceFast had recorded for it at block 16800000 and how long each attribute had been held by then?”
Technical details
Endpoint
GEThttps://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/attributes/at-block?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a point-in-time snapshot of what attributes (classifications, labels, entity types) a specific Ethereum address held at a historical block, including how long each attribute had been held. Prefer this over the current-attributes endpoint when auditing historical state, performing compliance checks at a specific block, or reconstructing how an address was classified during a past event. This is specifically suited for time-anchored knowledge graph queries on Ethereum mainnet (chain 1).
Side effects
- Invalid address format (not 0x-prefixed 40 hex characters) returns an error
- Block number not yet finalized or exceeds chain tip returns an error
- Address has no known attributes in TraceFast knowledge graph at that block returns empty result
- Network or upstream data unavailability returns a service error
- Malformed block parameter (non-numeric or out-of-range) returns a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Tags
x402
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