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x402-factory EDGAR 13F Holdings Diff
x402
x402-factory EDGAR 13F Holdings Diff is a paid API for AI agents from x402-factory.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Returns a quarter-over-quarter diff of a hedge fund or institutional investor's 13F holdings by CIK, showing what positions were added, removed, or changed
Price / call$0.05
Success—
StatusUnknown
How this service works
Paid data APIs for AI agents: prediction-market analytics, weather intelligence, weather×market edge signals, and SEC/gov data. Paid endpoints use the x402 protocol (HTTP 402 + USDC on Base): call without payment to receive requirements, retry with an X-PAYMENT header. Machine-readable catalog: /llms.txt. Per-endpoint docs: /docs/{id}.
Output
A structured diff of the fund's 13F SEC filing compared to the prior quarter, listing securities added (new positions), removed (exited positions), and changed (increased or decreased size), keyed by CIK. Each entry typically includes the security name, CUSIP or ticker, prior holding size, current holding size, and the delta.
Example use cases
Hedge fund portfolio shift tracker
“What did Bill Ackman's Pershing Square add or sell in their latest 13F? Give me a diff against the prior quarter — their CIK is 0001336528.”
Activist investor entry detection
“I want to know if any new positions appeared in Elliott Management's latest 13F filing versus the previous one — their SEC CIK is 0001048268. Show me what's new.”
Earnings-season portfolio review
“Can you pull the 13F quarter-over-quarter diff for Renaissance Technologies, CIK 0001037389, so I can see which tech stocks they trimmed or added this cycle?”
Technical details
Endpoint
GEThttps://x402-factory.com/v1/edgar/13f/%7Bcik%7D/diffWhen to prefer
Choose this endpoint when you need machine-readable, pre-computed quarter-over-quarter diffs of SEC 13F filings for a specific institutional filer identified by CIK. It is ideal for AI agents that need to detect hedge fund portfolio changes, track activist investors, or monitor institutional sentiment without parsing raw EDGAR XML. Prefer this over raw EDGAR access when you need normalized, diff-ready data with a simple per-call pricing model via x402/USDC.
Side effects
- Invalid or unknown CIK returns a 404 or empty result
- CIK exists but filer has not submitted a 13F (e.g. non-institutional filer) returns empty or error
- Payment not included returns HTTP 402 with USDC/Base payment requirements
- Rate limiting or network timeout if retried too quickly
- No prior quarter filing available for diff — only one filing on record — returns incomplete diff or error
- EDGAR data lag: most recent quarter may not yet be processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Tags
x402
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