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verify-package
x402
verify-package is a paid API for AI agents from goodsong.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Checks whether an npm, PyPI, or crates.io package exists, is deprecated/yanked, and has known security vulnerabilities via OSV.dev advisories.
Price / call$0.005
Success—
StatusUnknown
How this service works
Verify a package: does it exist, is it deprecated or yanked, and does it have known vulnerabilities? Checked against the npm/PyPI/crates.io registry plus OSV.dev advisories.
Output
Returns whether the package exists in the specified registry, whether it has been deprecated or yanked, and a list of known security vulnerabilities sourced from OSV.dev advisories, including advisory IDs and severity details where available.
Example use cases
Audit a new dependency before adding it
“Before I add 'axios' version 1.4.0 to my project, can you verify it exists on npm, isn't deprecated, and doesn't have any known security vulnerabilities?”
CI pipeline vulnerability gate
“Our CI pipeline just flagged the Rust crate 'serde' — can you check if it's been yanked and whether any known CVEs affect it on crates.io?”
Python supply chain safety check
“I want to make sure the 'cryptography' package on PyPI is still published and doesn't have any OSV advisories against it — can you verify that for me?”
Technical details
Endpoint
POSThttps://goodsong.dev/verify/packageWhen to prefer
Choose this endpoint when you need a quick, combined existence + deprecation + vulnerability check for a single package from npm, PyPI, or crates.io. It is ideal for pre-install dependency auditing, CI/CD gating, or agent-driven security reviews where you want a one-shot answer without separately querying the registry and OSV.dev yourself.
Side effects
- Package not found in the specified registry — returns existence: false
- Unsupported ecosystem value — returns validation error on the ecosystem enum
- Specific version not found — may return version-not-found error even if package exists
- OSV.dev rate limits or downtime — may cause incomplete vulnerability results
- Ambiguous package name across ecosystems — caller must specify correct ecosystem
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| name | string | The package name. |
| version | string | Optional specific version; defaults to latest if omitted. |
| ecosystem | string | Which package registry to check. |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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