crates.io
FreeLiveLast verified 24 Sept 2026
Rust crate metadata, versions, downloads and dependencies from the official crates.io registry.
Example request
curl -A 'YourApp/1.0 (+https://example.com)' 'https://crates.io/api/v1/crates/serde'
Free tier, in plain English
Free and keyless for normal API use; for bulk data they publish a full database dump instead of scraping the API.
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