ToolVet
81trust / 100

Verify Case

by realcite-case in Security & trust

x402 APIPassing, checked 3 h ago

Verify a legal case citation: does it exist, and does the given case name match the canonical record? Catches a fabricated case citation, including a real-looking citation number paired with an invented case name. Checked against CourtListener. Does not check whether a case is still good law -- no free authoritative source publishes that.

POST https://goodsong.dev/verify/case

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
293 ms typical, 293 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://goodsong.dev/verify/case" \
  -H "content-type: application/json" \
  -d '{"case_name":"Obergefell v. Hodges","citation":"576 U.S. 644"}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.03:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgoodsong.dev%2Fverify%2Fcase
const res = await pay("https://goodsong.dev/verify/case", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"case_name":"Obergefell v. Hodges","citation":"576 U.S. 644"}),
});
console.log(await res.json());

Example input

{
  "case_name": "Obergefell v. Hodges",
  "citation": "576 U.S. 644"
}

Example output

{
  "canonical": {
    "absolute_url": "/opinion/2812209/obergefell-v-hodges/",
    "case_name": "Obergefell v. Hodges",
    "date_filed": "2015-06-26"
  },
  "checks": {
    "case_name_match": true,
    "exists": true
  },
  "cost": {
    "amount": "0.01",
    "currency": "USDC"
  },
  "evidence": [
    {
      "retrieved_at": "2026-08-30T12:00:00Z",
      "source": "courtlistener",
      "url": "https://www.courtlistener.com/api/rest/v4/citation-lookup/"
    }
  ],
  "latency_ms": 220,
  "verdict": "confirmed"
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402293 ms$0.01