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Vellum Filing Delta
x402
Vellum Filing Delta is a paid API for AI agents from x402-data-api.x402agent.workers.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-13).
Returns only new SEC filings and changed XBRL financial figures for a company within a date window, including previous values and percentage moves — optimized for cheap polling of a watchlist.
Price / call$0.05
Success—
StatusUnknown
How this service works
SEC filing delta since a date: new filings, form counts, updated financial facts and change signals for monitoring agents.
Output
A JSON object containing: the date window queried, company identity (CIK, name, ticker), a boolean 'changed' flag, a human-readable signals array summarizing key changes, a list of new filings with form type and URL, and a list of updated XBRL financial figures each showing the current value, previous reported value, and percentage change.
Example use cases
Watchlist earnings surprise detection
“Check if any of the companies on my watchlist filed new 10-Qs or updated their revenue figures in the last 30 days — I want to see the percentage change versus the prior reported period.”
8-K alert for activist investor
“Has Salesforce filed any new 8-Ks in the past two weeks, and did they re-report any financial metrics? Show me what changed versus the previous filing.”
Cheap daily portfolio monitoring
“I want to poll Apple, Nvidia, and Tesla for any SEC filing activity or XBRL changes in the last 7 days without paying for a full research report — just give me what's new or different.”
Technical details
Endpoint
GEThttps://x402-data-api.x402agent.workers.dev/filing-delta?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to efficiently poll one or more companies for changes since your last check — it returns only the delta (new filings + re-reported financials with prior values) rather than a full snapshot, making it far cheaper for recurring watchlist monitoring. Prefer it over vellum-filing-brief or vellum-sec-research when you already have baseline data and only want incremental changes.
Side effects
- Invalid or unknown CIK/ticker returns empty result or error
- Date window too narrow returns no changes even if filings exist
- EDGAR rate limits or downtime cause upstream fetch failures
- XBRL tags not present in filings yield empty updated_financials array
- Payment of $0.25 USDC not completed results in 402 rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"as_of": "2026-09-18T22:40:00.000Z",
"brand": "Vellum",
"source": "SEC EDGAR",
"window": {
"days": 30,
"since": "2026-08-19",
"until": "2026-09-18"
},
"changed": true,
"company": {
"cik": "0000789019",
"name": "Microsoft Corp",
"ticker": "MSFT"
},
"service": "filing-delta",
"signals": [
"1 new filing(s) since 2026-08-19",
"1× 8-K",
"revenue +7.62% versus the prior reported period"
],
"new_filings": [
{
"url": "https://www.sec.gov/Archives/edgar/data/789019/...",
"form": "8-K",
"filed": "2026-08-27",
"period": "2026-08-27"
}
],
"updated_financials": [
{
"tag": "RevenueFromContractWithCustomerExcludingAssessedTax",
"unit": "USD",
"label": "Revenues",
"current": {
"form": "10-K",
"filed": "2026-07-30",
"value": 69632000000,
"period_end": "2026-06-30"
},
"change_pct": 7.62,
"previous_reported": {
"form": "10-Q",
"filed": "2026-04-30",
"value": 64703000000,
"period_end": "2026-03-31"
}
}
],
"new_filings_by_form": {
"4": 3,
"8-K": 1
}
}
}Tags
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