Shares Outstanding API: Get reported common shares outstanding by period for one filer from XBRL — SEC XBRL

Get reported common shares outstanding by period for one filer from XBRL — the series behind dilution and per-share math, deduplicated. Use instead of digging share counts out of companyfacts or cover pages.

$0.02 per call — pay with prepaid card credits (Authorization: Bearer ck_live_…, packs from $1) or with USDC over x402: call it, get 402 with the price, retry signed. Failed calls are never charged.

How do you call it?

GET /v1/sec/xbrl/shares — product id sec_shares_outstanding. Over MCP, call answerpool_get with product_id=sec_shares_outstanding.

curl "https://answerpool.io/v1/sec/xbrl/shares?ticker=NVDA"

# with a prepaid credit key
curl -H "Authorization: Bearer ck_live_..." "https://answerpool.io/v1/sec/xbrl/shares?ticker=NVDA"

Live call: https://answerpool.io/v1/sec/xbrl/shares?ticker=NVDA · JSON sample: /v1/samples/sec_shares_outstanding

What does the answer look like?

A representative response, the same static sample served at /v1/samples/sec_shares_outstanding.

points

{
 "as_of": "2026-08-31T14:00:00Z",
 "cik": "0000320193",
 "points": [
  {
   "end": "2026-06-28",
   "value": 15000000000.0,
   "form": "10-Q",
   "fy": 2026,
   "fp": "Q3",
   "filed": "2026-08-01"
  }
 ],
 "source": "https://data.sec.gov/api/xbrl/companyconcept/CIK0000320193/us-gaap/CommonStockSharesOutstanding.json",
 "refresh_after": "2026-09-17T11:15:00.000Z"
}

How fresh is it, and where does the data come from?

The fastest source behind this answer can change every 15 minutes, so every response carries a refresh_after timestamp — right now it would be 2026-09-17T11:15:00.000Z. Schedule the next call on that value rather than on a guess.

• SEC EDGAR (US federal public domain) — upstream: https://efts.sec.gov

Method version 0.1.0 · serving cache 1 day · every response carries a result_id you can resolve at /v1/provenance.

When should you use it?

Share-count questions.

What you skip building

• companyfacts digging
• dei tag handling

When should you not use it?

Public float — not served yet.

Where else can you find this?

• Catalog entry (JSON, free)
• OpenAPI schema — input and output types, prices, the 402 flow
• llms.txt — every product in one plain-text document