ToolVet
79trust / 100

Relations History

by TraceFast in Onchain & crypto

x402 APIPassing, checked 45 min ago

TraceFast knowledge graph: every relation interval an address has held, oldest first — as the subject (`direction=subject`: what it pointed at, default) or as the object (`direction=object`: who pointed at it). Path address: The address, `0x`-prefixed, 40 hex characters, any case. Query direction: `subject` (default) or `object`; limit: 1..=500, default 100. Docs: https://docs.tracefast.xyz/api/address-relation-history.md

GET
https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/relations/history
Price
$0.025
per call in USDC
Uptime
96.5%
last 30 days
Response time
297 ms
505 ms slowest 5%
Last check
Passed
45 min 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/relations/history

Each call costs $0.025 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/relations/history?limit=10

Example response

The provider's example. We can't check it without paying.

{
  "data": {
    "address": "0x7a250d5630b4cf539739df2c5dacb4c659f2488d",
    "chainId": 1,
    "coveredFamilies": [
      "relation:was_implementation_of"
    ],
    "direction": "subject",
    "intervals": [
      {
        "attributeId": "relation:freeze_membership",
        "counterpart": "0x5ee3188a3f8adee1d736edd4ae85000105c88f66",
        "endBlock": 21415288,
        "startBlock": 21410749
      }
    ],
    "truncated": false
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.025.

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/relations/history?limit=10'

# 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/relations/history?limit=10' \
  | 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 $0.025 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.025" });
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 $0.025 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmpp.tracefast.xyz%2Fapi%2Fv1%2Fchains%2F1%2Fentities%2F%3Aaddress%2Frelations%2Fhistory
const res = await pay("https://mpp.tracefast.xyz/api/v1/chains/1/entities/:address/relations/history?limit=10");
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 $0.025 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.025"})
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/relations/history?limit=10")
    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
45 min agoPassed402269 ms$0.025
5 h agoPassed40239 ms$0.025
9 h agoPassed402367 ms$0.025
14 h agoPassed40285 ms$0.025
18 h agoPassed402390 ms$0.025
Show 10 older checks
22 h agoPassed402505 ms$0.025
26 h agoPassed402258 ms$0.025
31 h agoPassed402352 ms$0.025
35 h agoPassed402350 ms$0.025
39 h agoPassed402194 ms$0.025
43 h agoPassed402397 ms$0.025
47 h agoPassed402297 ms$0.025
2 days agoPassed402112 ms$0.025
2 days agoPassed402337 ms$0.025
2 days agoTimed out---

History

12 Oct 2026Price changed from $0.05 to $0.025