Massive
GET https://agent.massive.com/stocks/filings/vX/13-F
Listed in Coinbase x402 Bazaar
SEC Form 13F filings data showing institutional investment manager holdings. Form 13F is required to be filed quarterly by institutional investment managers with at least $100 million in qualifying assets under management. Can't find what you're looking for? POST feedback to /feedback, no charge.
Other endpoints from agent.massive.com
The same service's other paid functions that Hagglyai tracks, each with its own price. Functions outside Hagglyai's categories are not listed.
| Endpoint | Category | Price per call |
|---|---|---|
| GET /stocks/filings/10-K/vX/sections | Stocks & forex | $0.01 |
| GET /stocks/filings/vX/index | Stocks & forex | $0.01 |
| GET /v2/reference/news | News | $0.01 |
| GET /v2/snapshot/locale/us/markets/stocks/tickers | Stocks & forex | $0.01 |
| GET /v2/snapshot/locale/us/markets/stocks/tickers/:stocksTicker | Stocks & forex | $0.01 |
| GET /v3/reference/tickers | Stocks & forex | $0.01 |
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X GET "https://agent.massive.com/stocks/filings/vX/13-F"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-14 18:30 | Valid 402 | 402 | 335 ms | $0.01 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves