Plans and limits
| Plan | Per minute | Per day | Includes |
|---|---|---|---|
| Free key | 10 | 100 | Every free dataset through the API and MCP server |
| Paid | 60 | 10,000 | Adds the paid data in your plan, such as weekly lake series, storm reports and alerts |
| Enterprise | Set in your contract | Set in your contract | Custom areas, invoicing, single sign-on |
- API and MCP calls share one allowance per key.
- File downloads through signed links do not count toward call limits.
- A call over the limit returns
rate_limitedwithRetry-After.
Prices are on heimdallresearch.com/data/plans. Agencies and universities can pay by invoice.