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Verify Filing

by realcite-filing in Security & trust

x402 APIPassing, checked 2 h ago

Verify an SEC filing: given a filer's CIK and a claimed accession number, does that filing actually exist, and does its form type/filing date match what's claimed? Checked against SEC EDGAR's submissions API. Catches a fabricated or misattributed filing citation, including a real-looking accession number paired with an invented form type or date.

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

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
281 ms typical, 349 ms slowest 5%
Last check
2 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/filing" \
  -H "content-type: application/json" \
  -d '{"accession_number":"0000320193-23-000106","cik":"320193"}'
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 $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fgoodsong.dev%2Fverify%2Ffiling
const res = await pay("https://goodsong.dev/verify/filing", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"accession_number":"0000320193-23-000106","cik":"320193"}),
});
console.log(await res.json());

Example input

{
  "accession_number": "0000320193-23-000106",
  "cik": "320193"
}

Example output

{
  "canonical": {
    "accession_number": "0000320193-23-000106",
    "cik": "0000320193",
    "company": "Apple Inc.",
    "filing_date": "2023-11-03",
    "form": "10-K",
    "report_date": "2023-09-30"
  },
  "checks": {
    "date_match": true,
    "exists": true,
    "form_match": true
  },
  "cost": {
    "amount": "0.005",
    "currency": "USDC"
  },
  "evidence": [
    {
      "retrieved_at": "2026-08-30T12:00:00Z",
      "source": "sec_edgar",
      "url": "https://data.sec.gov/submissions/CIK0000320193.json"
    }
  ],
  "latency_ms": 240,
  "verdict": "confirmed"
}

Security scan

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

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