# Ecosyste.ms Cargo (crates.io) Package Metadata Lookup

> Ecosyste.ms Cargo (crates.io) Package Metadata Lookup is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns aggregated ecosyste.ms metadata for a Rust crates.io package by name, including dependency, repository, and ecosystem stats.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/ecosystems-cargo-package
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ecosyste-ms-cargo-crates-io-package-metadata-lookup-99031528
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m9VD52cuUjXvATpZUzftY

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability ecosyste-ms-cargo-crates-io-package-metadata-lookup-99031528 -d '<json body>'
```

Example prompt: Can you pull up the ecosyste.ms metadata for the Rust crate 'serde' on crates.io — I want to see its download stats, repo info, and ecosystem details?

## When to prefer this

Use this endpoint when you need rich, aggregated open-source ecosystem metadata for a Rust crate — beyond what the raw crates.io API provides — such as cross-repository dependency graphs, download trends, and ecosyste.ms-specific signals. Prefer this over direct crates.io API calls when you want normalized, multi-source ecosystem data in a single JSON response.

## Known failure modes

- Package not found on crates.io returns empty or null result
- Invalid or misspelled crate name returns no data
- ecosyste.ms upstream data unavailable leads to partial or stale response
- Missing ?q= parameter causes a bad request error
- Rate limiting or payment failure (x402) blocks the response

## How this service works

Aggregated ecosyste.ms metadata for Rust crates.io package {q}. Query: ?q= Returns JSON.

## Output

A JSON object containing aggregated ecosyste.ms metadata for the requested Rust crate, including package name, version, repository URL, download counts, dependency statistics, and other ecosystem-level signals sourced from ecosyste.ms for crates.io.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ecosyste-ms-cargo-crates-io-package-metadata-lookup-99031528/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)