Entities Activity
by TraceFast in Onchain & crypto
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
https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity- Price
- $0.01
- per call in USDC
- Uptime
- 100%
- last 30 days
- Response time
- 268 ms
- 504 ms slowest 5%
- Last check
- Passed
- 3 h ago, next any minute now
Reliability
Status and outage history · Atom feed · Watch with other listings
How to call it
GET https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity
Each call costs $0.01 in USDC on Base, paid with the request over x402.
Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.
Example request
From the listing.
GET https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activityExample response
The provider's example. We can't check it without paying.
Example response, 26 lines
{
"data": {
"address": "0xf977814e90da44bfa03b6295a0616a897441acec",
"chainId": 1,
"firstSeenBlock": 8115394,
"firstSeenTimestamp": 1562653163,
"lastActivity": {
"block": 26096544,
"bySource": {
"directTx": 26095721,
"events": null,
"internalTransfers": 25946150,
"tokenTransfers": 26096544
},
"sources": [
"events"
],
"timestamp": 1790846579
},
"lastInteractionBlock": 26095721,
"lastInteractionTimestamp": 1790836655,
"lastStateChangeBlock": 26095721,
"lastStateChangeTimestamp": 1790836655,
"stateChangeCount": 20182
}
}Call it from code
The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.
curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity'
# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity' \
| grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decodeJavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";
// Pays at most $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);
// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmpp.tracefast.xyz%2Fapi%2Fv1%2Fchains%2F1%2Fentities%2F%3Aaddress%2Factivity
const res = await pay("https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity");
console.log(res.status, await res.text());Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client
# Pays at most $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))
with x402_requests(client) as session:
res = session.get("https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/activity")
print(res.status_code, res.text)Security scan
No findings
We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 3 h ago | Passed | 402 | 172 ms | $0.01 |
| 7 h ago | Passed | 402 | 389 ms | $0.01 |
| 11 h ago | Passed | 402 | 171 ms | $0.01 |
| 15 h ago | Passed | 402 | 143 ms | $0.01 |
| 20 h ago | Passed | 402 | 52 ms | $0.01 |
Show 10 older checks
| 24 h ago | Passed | 402 | 118 ms | $0.01 |
| 28 h ago | Passed | 402 | 123 ms | $0.01 |
| 32 h ago | Passed | 402 | 423 ms | $0.01 |
| 36 h ago | Passed | 402 | 61 ms | $0.01 |
| 40 h ago | Passed | 402 | 178 ms | $0.01 |
| 44 h ago | Passed | 402 | 134 ms | $0.01 |
| 2 days ago | Passed | 402 | 268 ms | $0.01 |
| 2 days ago | Passed | 402 | 349 ms | $0.01 |
| 2 days ago | Passed | 402 | 504 ms | $0.01 |
| 2 days ago | Passed | 402 | 413 ms | $0.01 |
History
| 12 Oct 2026 | Price changed from $0.02 to $0.01 |