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AnswerPool 13F Changes
x402
AnswerPool 13F Changes is a paid API for AI agents from answerpool.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Returns quarter-over-quarter 13F portfolio changes for a given SEC filer — new, exited, increased, and decreased positions with share counts and USD values for both periods.
Price / call$0.05
Success—
StatusUnknown
How this service works
AnswerPool turns SEC EDGAR, the Federal Register, USAspending, NIH, BLS and OpenAlex into structured JSON answers that AI agents and developers fetch in one call. 69 endpoints free, no account; derived analyses $0.02–$0.05 per call by card credits or USDC (x402). MCP server, full provenance.
Output
A JSON object containing the manager's CIK, name, current and prior reporting periods, total count of changes, and an array of change rows each with issuer name, CUSIP, change type (new/exited/increased/decreased), current and prior share counts, and current and prior USD values.
Example use cases
Track hedge fund's new stock bets
“Show me every new position that CIK 0001067983 (Berkshire Hathaway) opened in their most recent 13F quarter — include share counts and USD values.”
Monitor a fund's full exits last quarter
“Which stocks did the fund with CIK 0001657201 completely exit in their latest quarterly 13F filing? Give me the previous value and share count for each.”
Identify largest position increases
“For manager CIK 0001566307, pull up to 200 of their 13F position changes from last quarter and show me which holdings they increased the most in dollar value.”
Technical details
Endpoint
GEThttps://answerpool.io/v1/sec/13f/changesWhen to prefer
Choose this endpoint when you need a pre-computed, structured diff of a manager's 13F holdings across two consecutive quarters in a single API call — saving the effort of fetching and comparing two raw 13F filings yourself. It is especially valuable when you want classified change types (new/exited/increased/decreased) alongside dual-period values and shares, which competitors typically offer only as a premium derived layer.
Side effects
- Invalid or non-existent CIK returns an error or empty result
- CIK with no 13F filing history returns empty changes array
- Manager has only one period on record — no prior period available for comparison
- Limit parameter out of range (less than 1 or greater than 200) returns validation error
- Filing lag means most recent quarter data may not yet be available shortly after quarter end
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"cik": "0001566307",
"as_of": "2026-08-31T17:00:00Z",
"count": 1,
"period": "2025-12-31",
"changes": [
{
"cusip": "67066G104",
"change": "new",
"issuer": "NVIDIA CORP",
"shares": 4000,
"value_usd": 500000,
"prev_shares": null,
"prev_value_usd": null
}
],
"prev_period": "2025-09-30",
"manager_name": "Ramiah Investment Group",
"periods_held": [
"2025-12-31",
"2025-09-30"
]
}
}Tags
x402
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