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RealCite Filing Verifier
x402
RealCite Filing Verifier is a paid API for AI agents from goodsong.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Verifies an SEC filing by checking whether a given CIK and accession number exist in EDGAR, and whether the claimed form type and filing date match the official record.
Price / call$0.005
Success—
StatusUnknown
How this service works
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.
Output
Returns whether the filing exists in EDGAR for the given CIK, and if optional fields were provided, whether the form type and/or filing date match the official record. Flags mismatches or non-existent filings so fabricated or misattributed citations can be caught.
Example use cases
Fact-checking AI-generated financial reports
“An AI assistant cited SEC filing 0001193125-24-012345 for Tesla (CIK 1318605) as a 10-K filed on 2024-02-15 — can you check EDGAR to confirm that accession number actually exists and that the form type and date are correct?”
Validating research sources before publication
“Before I publish this analysis, please verify that the 8-K filing I'm citing — accession number 0000021344-23-000089, CIK 21344 — actually exists in EDGAR and matches the form type 8-K I've noted.”
Detecting hallucinated SEC citations in legal documents
“This legal brief references an SEC Form 4 filing with accession number 0000950170-22-001234 for a company with CIK 1067983 — can you check if that filing is real and whether the form type is actually a 4?”
Technical details
Endpoint
POSThttps://goodsong.dev/verify/filingWhen to prefer
Use this endpoint when you need to verify the authenticity of a specific SEC filing citation, especially when an AI model, analyst, or document has provided a CIK-accession number pair and you want to confirm it isn't hallucinated or misattributed. Prefer this over generic web search when you need a definitive, structured answer checked directly against EDGAR's authoritative submissions API.
Side effects
- CIK does not exist in EDGAR — returns not found
- Accession number format is malformed — may return parse error or not found
- SEC EDGAR API is temporarily unavailable — upstream timeout or error
- Filing exists but form type provided doesn't match — returns mismatch with actual form type
- Filing exists but date doesn't match claimed date — returns mismatch with actual date
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cik | string | The filer's SEC Central Index Key (CIK), e.g. '320193' or '0000320193'. |
| form_type | string | Optional expected form type, e.g. '10-K', '8-K', '4'. |
| filed_date | string | Optional expected filing date (YYYY-MM-DD) to cross-check. |
| accession_number | string | The filing's SEC accession number, e.g. '0000320193-23-000106'. |
Tags
x402
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