Massive
SEC Form 4 filings reporting changes in beneficial ownership of securities. Filed by corporate insiders (directors, officers, and 10%+ shareholders) within two business days of a transaction. Can't find what you're looking for? POST feedbac
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 250 ms
- Price
- $0.010 per call
- Paying buyers, last 30 days
- 3 (directory's own records)
- Paid calls, last 30 days
- 3
- Category
- Company filings (SEC)
- Address
- https://agent.massive.com/stocks/filings/vX/form-4
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/41baeec15560.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).