80trust / 100

Entities Activity

by TraceFast in Onchain & crypto

x402 APIPassing, checked 3 h ago

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

GET
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

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

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/activity

Example 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 --decode
JavaScript: 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

WhenResultHTTPTimePrice
3 h agoPassed402172 ms$0.01
7 h agoPassed402389 ms$0.01
11 h agoPassed402171 ms$0.01
15 h agoPassed402143 ms$0.01
20 h agoPassed40252 ms$0.01
Show 10 older checks
24 h agoPassed402118 ms$0.01
28 h agoPassed402123 ms$0.01
32 h agoPassed402423 ms$0.01
36 h agoPassed40261 ms$0.01
40 h agoPassed402178 ms$0.01
44 h agoPassed402134 ms$0.01
2 days agoPassed402268 ms$0.01
2 days agoPassed402349 ms$0.01
2 days agoPassed402504 ms$0.01
2 days agoPassed402413 ms$0.01

History

12 Oct 2026Price changed from $0.02 to $0.01