National Institute of Standards and Technology (NIST) · Pricing Plans
Nist Plans Pricing
NIST APIs (National Vulnerability Database, Chemistry WebBook, Internet Time Service, Material Measurement Laboratory data) are public goods provided at no charge by the U.S. federal government. There are no paid plans, contracts, or commercial tiers. Optional API keys raise the per-key request quota but remain free of charge. Use is governed by NIST Terms of Use.
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Plans
NIST Public APIs — Anonymous
freemium
Free anonymous access to NIST public APIs. Subject to a default rate limit of 5 requests per 30-second rolling window for the NVD API.
Anonymous access (month · month)
0.00 USD
- No registration required
- 5 requests / 30 seconds (NVD)
- NIST Terms of Use apply
NIST Public APIs — API Key
freemium
Free registered access. Email-verified API key raises NVD limit to 50 requests per 30-second rolling window.
Registered access (month · month)
0.00 USD
- Free registration via NVD developer portal
- 50 requests / 30 seconds (NVD)
- 10x higher quota than anonymous
- Email activation required