Form D Re-check API: Half-cent poll: ids of Form D filings added or updated since your — SEC Form D

Half-cent poll: ids of Form D filings added or updated since your cursor, with the next cursor and the URL of the full feed. Call it in a loop; fetch the feed only when changed > 0.

$0.005 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/formd/changes — product id sec_formd_changes. Over MCP, call answerpool_get with product_id=sec_formd_changes.

curl "https://answerpool.io/v1/sec/formd/changes?cursor=c1_2026-09-16T12%3A00%3A00"

# with a prepaid credit key
curl -H "Authorization: Bearer ck_live_..." "https://answerpool.io/v1/sec/formd/changes?cursor=c1_2026-09-16T12%3A00%3A00"

Live call: https://answerpool.io/v1/sec/formd/changes?cursor=c1_2026-09-16T12%3A00%3A00 · JSON sample: /v1/samples/sec_formd_changes

What does the answer look like?

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

next_endpoints

{
 "as_of": "2026-09-16T12:15:00Z",
 "feed": "sec_formd",
 "changed": 2,
 "added": [
  "0002150620-26-000001"
 ],
 "updated": [],
 "truncated": false,
 "empty": false,
 "cursor_from": "c1_2026-09-16T12:00:00",
 "next_cursor": "c1_2026-09-16T12:15:00",
 "window": {
  "from": "2026-09-16T12:00:00",
  "to": "2026-09-16T12:15:00"
 },
 "full_feed_url": "/v1/sec/formd/since?since=2026-09-16T12:00:00",
 "coverage_started_at": "2026-08-27T00:00:00",
 "next_endpoints": [
  {
   "path": "/v1/sec/formd/since",
   "url": "/v1/sec/formd/since?since=2026-09-16T12:00:00",
   "description": "The rows themselves",
   "since the same cursor time": null,
   "price_usd": 0.0
  }
 ],
 "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 0 days · every response carries a result_id you can resolve at /v1/provenance.

What should you call next?

• sec_formd_since — The rows themselves (free)

When should you use it?

A polling loop that needs to know whether anything happened, cheaply, before deciding to fetch and parse rows.

What you skip building

• full-feed polling
• amendment detection
• dedup

When should you not use it?

Reading the offerings — /v1/sec/formd and its feeds return them. Backfills — cursors are clamped to 7 days; fetch the full feed instead.

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