crates.io

Mode: 🌐 Public · Domain: crates.io

Search and inspect crates on the public Rust crate registry. Both commands hit the unauthenticated crates.io/api/v1 directly.

Commands

Command	Description
opencli crates search <query>	Search the public crates.io registry by keyword
opencli crates crate <name>	Single crate metadata (latest version, downloads, license, repo)

Usage Examples

# Free-text search (name / keywords / description)
opencli crates search tokio --limit 10
opencli crates search "async runtime" --limit 20

# Single-crate detail (name from search rows)
opencli crates crate serde
opencli crates crate tokio

# JSON output
opencli crates search tokio -f json

Output Columns

Command	Columns
search	rank, name, latestVersion, description, downloads, recentDownloads, repository, updated, url
crate	name, latestVersion, description, downloads, recentDownloads, versions, license, homepage, documentation, repository, keywords, categories, created, updated, url

The name column from search round-trips into crate.

Options

search

Option	Description
query (positional)	Free-text search query
--limit	Max results (1–100, default: 20). 100 is crates.io's per-page upper bound.

crate

Option	Description
name (positional)	crates.io crate name (e.g. serde, tokio). Must match Rust's identifier rule.

Caveats

• crates.io requires a descriptive User-Agent per the data-access policy. The adapter sets one automatically.
• license is sourced from the latest version row in the package's version index — crate-level metadata does not carry a license field.
• recentDownloads is the rolling 90-day count exposed by the API; downloads is the lifetime total.
• keywords and categories are joined with , for display.

Prerequisites

• No browser required — uses crates.io/api/v1.