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TraceFast Address Activity Timeline
x402
TraceFast Address Activity Timeline is a paid API for AI agents from mpp.tracefast.xyz, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Returns three distinct activity timestamps for an Ethereum address: its first appearance on-chain, its last account-state change with change count, and the newest block where it participated in any on-chain action (transaction, token transfer, log, or value call).
Price / call$0.01
Success—
StatusUnknown
How this service works
TraceFast live Ethereum data: three different questions about when an address was active, each answered separately — when it was first mentioned anywhere on chain; when its own account state last changed and how many times it changed; and the newest block at which it took part in anything (a top-level transaction, a token transfer, an emitted log, a value-bearing call), with the sources that answer was… Path: address. Docs: https://docs.tracefast.xyz/api/address-activity.md
Output
Returns three grouped answers: (1) the earliest block where the address was first referenced anywhere on-chain; (2) the block of the address's last account-state change plus a count of total state changes; and (3) the most recent block in which the address participated in any on-chain action (top-level transaction, token transfer, emitted log, or value-bearing internal call), along with the data sources supporting that answer.
Example use cases
Wallet due diligence before a deal
“Before I send funds, can you check 0xAb5801a7D398351b8bE11C439e05C5B3259aec9B on Ethereum — when did it first appear on chain, and when was the last time it was active in any block?”
Smart contract dormancy check
“I need to know if this contract 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D has gone quiet recently — what's the newest block it participated in anything, and how many times has its account state changed overall?”
On-chain age verification for airdrop eligibility
“Can you look up 0x1f9090aaE28b8a3dCeaDf281B0F12828e676c326 on Ethereum and tell me the very first block it ever appeared in — I need to confirm it's an old enough address for our airdrop criteria?”
Technical details
Endpoint
GEThttps://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a concise, three-dimensional activity summary for an Ethereum address — specifically first appearance, state-change history, and most-recent participation — rather than full transaction lists or token balances. It is ideal for due diligence, eligibility checks, dormancy detection, and any workflow that needs to quickly characterize how old, how active, and how recently active an address is without iterating through raw transaction history.
Side effects
- Address not found or never appeared on chain — returns empty or null activity fields
- Invalid Ethereum address format — returns 400 validation error
- Address has no state changes (e.g. pure recipient) — change count may be zero
- Rate limit exceeded — returns 429 with retry guidance
- Node or indexing lag — most-recent block may lag actual chain head by a few blocks
- Payment not attached or insufficient — returns 402 payment required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — |
Tags
x402
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