crates.io Search — Fast Official Registry API

Search the crates.io Rust package registry and export normalized crate metadata.

Use it for Rust package discovery, dependency research, ecosystem analysis, package monitoring, registry datasets, and automated software-data workflows.

Common use cases

• Discover Rust crates matching a keyword
• Research packages and competing libraries in the Rust ecosystem
• Collect versions, download counts, timestamps, and repository links
• Build package datasets for dependency or ecosystem analysis
• Feed structured crate metadata into downstream workflows

What you get

Search rows preserve exact query provenance and source order. Depending on fields supplied by crates.io, rows can include crate name, highest/newest/stable/default versions, description, total/recent downloads, created/updated timestamps, homepage, documentation URL, repository URL, keywords, categories, exact-match flag, canonical crates.io URL, source URL, and capture timestamp.

Try it

{"queries":["serde"],"maxRows":25}

Source

This Actor uses the crates.io registry search endpoint GET https://crates.io/api/v1/crates. Cargo's current registry API documentation specifies that search does not include authorization and that per_page is capped at 100 results.

The Actor identifies itself with a descriptive User-Agent, serializes requests at roughly 1.1 seconds apart, retries transient 429/5xx/network failures, and caps one run at 1,000 billable crate rows.

Important limitations

This is deliberately a search-only Actor. It does not call per-crate detail endpoints and does not download .crate archives.

A legitimate zero-result query writes one non-billed complete-no-results summary row instead of leaving the default dataset silently empty. Source failures remain failures and are not converted into successful zero-result runs.

Pricing

Only successfully saved crate rows are billed.

Target: $0.25 per 1,000 saved crate rows ($0.00025 per crate), only if the live private benchmark clears the factory's 3× platform-cost gate.

Current Store research on October 2, 2026 found direct crates.io search competitors around $1.00 per 1,000 results, with very low current Store usage. This is therefore a price-positioned product experiment, not a claim of proven demand.

About Piven Core

Built and maintained by Piven Core — focused data APIs and automation utilities for reliable, production-ready workflows.

Learn more: https://pivencore.com