Data API docs · H-1B sponsorship
Employers with certified LCA employment windows covering today, by covered worker positions
GET https://usefootnote.com/api/data/v1/h1b/active-sponsors
A certified window is government-filed permission to employ for the stated period — never a live job posting or a hire count. Positions sum each case's covered worker count (one LCA can cover many workers). Windows are tested nightly; as_of reports the refresh date.
Tier
Every tier. Free keys see the free window; Developer, Data Pro and Enterprise widen it — the exact figures below.
| Tier | Calls | Burst | WARN window |
|---|---|---|---|
| Free | 50/day | 10/min | 30 days |
| Developer | 1,000/day | 30/min | 12 months |
| Data Pro | 10,000/day | 120/min | 24 months |
| Enterprise | 100,000/day | 600/min | full archive |
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| limit | integer 1–500 | no | Clamped server-side to 25 on the free tier, 500 on paid tiers (also the default). |
Example
curl -s "https://usefootnote.com/api/data/v1/h1b/active-sponsors" \ -H "Authorization: Bearer fn_live_YOUR_KEY"
200 — Ranked employers with active case/position counts, new-vs-continued split, median attested base, and certified-through dates. Every response is { data, meta }; rate-limit headers (x-ratelimit-limit, x-ratelimit-remaining) ride on every call.
Clients
npx footnote-data wraps this endpoint at the prompt (see the package README); the remote MCP server at https://usefootnote.com/api/mcp exposes it as a tool for agents. Licensing: CC BY 4.0 for display with attribution; commercial use on Data Pro and above.
Also in H-1B sponsorship
Need more depth than the free window? Developer is $29/mo, Data Pro $79/mo or $790/yr — plans on /data. Get a free key from your account.