Alternative data, served as REST.
Clean APIs for SEC filings, futures positioning, weather events, attention metrics, patents, regulations, congressional trades, and macro indicators. Built for quants, indie traders, and ML pipelines. No enterprise contracts.
50 requests/day free. No credit card.
# register, get your key curl -s -X POST api.hedgefriend.dev/v1/auth/register \ -H 'content-type: application/json' \ -d '{"email":"you@example.com"}' # 30-day Wikipedia attention for $NVDA curl -s \ -H "Authorization: Bearer $HF_KEY" \ 'api.hedgefriend.dev/v1/alt/wiki/NVDA?days=30' | jq
The signals quants actually use, not another OHLCV proxy.
Most retail finance APIs reshuffle the same price feed. HedgeFriend is built around the alternative data that academic literature has repeatedly shown to be predictive — and that public agencies already publish for free.
Primary sources only
SEC EDGAR, CFTC, FEMA, USPTO, FRED, the Federal Register. We don't scrape — we pull from the agency.
One auth, one shape
A single bearer token. Consistent JSON envelopes. Predictable pagination. No SOAP, no XBRL parsing on your side.
Indie-friendly pricing
50 requests/day free. $9/mo for serious backtests. No annual contracts, no sales calls, no quotas you can't see.
Ten feeds. One key.
SEC Filings
10-K, 10-Q, 8-K and other filings — type, date, period of report, and direct document URL.
Insider Trades
Form 4 transactions: who at the company bought or sold, share count, price, transaction code.
Institutional Holdings
13-F filings: fund name, position size, market value, period.
XBRL Financials
As-reported Revenue, NetIncome, EPS, TotalAssets and more from structured 10-K/10-Q filings.
CFTC Commitments of Traders
Long/short positioning by trader category — commercial, non-commercial, open interest — for tracked futures contracts.
FEMA Disaster Declarations
Federally declared hurricanes, floods, wildfires, severe storms by event type, state, and date.
Wikipedia Attention
Daily pageview counts for the company's Wikipedia article — raw counts, no smoothing.
USPTO Patents
Patent grants by company assignee — title, grant date, claims count.
Federal Register
Rules and proposed rules from the SEC, FDA, EPA, FTC and other federal agencies.
JSON that behaves the same on every endpoint.
Every list endpoint returns the same envelope: a data array, a meta block with pagination, and an X-RateLimit-* header on every response. Errors come back as { error, code }. That's it.
- Bearer token auth — no signing, no OAuth dance.
- ISO-8601 dates. UTC always. Decimal numbers as numbers.
- Rate limits surfaced via headers. No quota guessing.
{
"data": [
{
"filing_date": "2026-04-21",
"reporter": "Huang, Jen-Hsun",
"role": "CEO, 10% Owner",
"transaction_code": "S",
"shares": 120000,
"price": 982.41,
"value_usd": 117889200
}
],
"meta": {
"count": 1,
"next": "cursor:eyJpZCI6..."
}
}Free for hobbyists. Cheap for everyone else.
- 5,000 requests/day
- All endpoints
- 50,000 requests/day
- Priority support
Build with the same data the funds use.
Sign up, copy your key, and ship a backtest tonight.