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.
Nist Plans Pricing is the machine-readable pricing-plan profile for National Institute of Standards and Technology (NIST) on the APIs.io network, in the API Commons Plans shape.
It defines 2 plans, covering freemium tiers, with named plans including NIST Public APIs — Anonymous, NIST Public APIs — API Key.
This profile was written by API Evangelist and has not been verified against a page the provider published; treat every figure as unconfirmed until a dated transcription replaces it.
Tagged areas include Cybersecurity, Government, Public Data, Standards, and Scientific Data.
generated, dated 2026-05-05.
Plans
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.
- No registration required
- 5 requests / 30 seconds (NVD)
- NIST Terms of Use apply
Free registered access. Email-verified API key raises NVD limit to 50 requests per 30-second rolling window.
- Free registration via NVD developer portal
- 50 requests / 30 seconds (NVD)
- 10x higher quota than anonymous
- Email activation required
Sources
Work with this as data
Every plan here is available over the APIs.io API and to AI agents over MCP.