Real-time insider
trading data for
developers
The first developer-first Form 4 API with real-time webhooks, amendment-aware parsing, and self-serve billing. Built on 100% public SEC EDGAR data.
IEX Cloud shut down in August 2024. Looking for a replacement with webhooks, real-time Form 4 data, and a genuine free tier?
Get started free// features
Everything you need to track insider trades
Real-time filings
EDGAR polled every 10 minutes. Form 4 filings parsed and available via API within minutes of submission.
Webhooks
Subscribe to push alerts filtered by ticker, insider, or transaction type. Delivered with signed payloads and automatic retries.
Trading signals
Cluster buy and sell detection built in. Get notified when multiple insiders at the same company trade in the same direction.
Amendment-aware
Form 4/A amendments are resolved automatically. No double-counting. Competitors get this wrong — we handle it correctly.
MCP server
Coming soon: native Model Context Protocol support so AI agents (Claude, GPT, Gemini) can query insider data as a tool.
Simple auth
One API key in the X-Api-Key header. No OAuth, no tokens to refresh. Start querying in 30 seconds.
// built for
Who uses Form4API
Quant & algo traders
Insider signal is a well-documented alpha factor. Feed Form 4 data directly into your strategy on Composer, QuantConnect, or Collective2.
Fintech newsletters
Power your insider-tracking newsletter with real-time data. Unusual Whales, Insider Monkey — the same data, at a fraction of the cost.
AI investment agents
LLM-powered tools need structured real-time data. Our MCP server makes Form 4 filings a native tool for Claude, GPT, and Gemini agents.
Corporate IR teams
Monitor competitor insider activity and benchmark your own patterns against peers. Webhook alerts the moment a filing hits.
// quick start
Query in 30 seconds
curl https://api.form4api.com/v1/transactions \
-H "X-Api-Key: fapi_live_your_key" \
-G \
-d "ticker=AAPL" \
-d "limit=5"{
"data": [
{
"id": "tx_01hwz...",
"company": "Apple Inc.",
"ticker": "AAPL",
"insider": "Tim Cook",
"title": "CEO",
"type": "sell",
"shares": 511000,
"price": 192.35,
"value": 98,370,850,
"filed_at": "2026-05-01T16:05:00Z"
}
],
"total": 1,
"page": 1
}// pricing
Simple, transparent pricing
Free
For personal projects and exploration.
- ✓1,000 requests / day
- ✓20 requests / minute
- ✓7-day data history
- ✓REST API access
- ✓Community support
Pro
For developers building trading tools.
- ✓50,000 requests / day
- ✓200 requests / minute
- ✓Full data history
- ✓5 webhook endpoints
- ✓Email support (48h)
Business
For teams and production applications.
- ✓250,000 requests / day
- ✓500 requests / minute
- ✓Full data history + Signals
- ✓25 webhook endpoints
- ✓Email support (24h)
Enterprise
For high-volume and institutional use.
- ✓Unlimited requests / day
- ✓2,000 requests / minute
- ✓Full data history + Signals
- ✓Unlimited webhooks
- ✓Slack + SLA