# SignalDesk AI Package Lookup

> SignalDesk AI Package Lookup is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-09).

Looks up package metadata (version, license, dependency count) for npm or PyPI packages

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/package?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-package-lookup-701f132b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fQYPh89YuZAl387w3Erg1

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 signaldesk-ai-package-lookup-701f132b
```

Example prompt: Can you look up the latest version, license, and number of dependencies for the 'express' package on npm?

## When to prefer this

Use this endpoint when you need quick, structured metadata (version, license, dependency count) for a specific npm or PyPI package without scraping registry pages manually. Prefer it over raw web searches when you need machine-readable output for compliance checks, dependency audits, or version pinning decisions.

## Known failure modes

- Package not found in the specified ecosystem — returns error or empty result
- Invalid ecosystem value (not 'npm' or 'pypi') — schema validation error
- Missing required 'package' query parameter — request rejected
- Network or upstream registry timeout — may return partial or error response
- Payment not completed (x402) — request blocked before execution

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

Returns a JSON object with the package name, latest version string, SPDX license identifier, and total dependency count for the specified npm or PyPI package.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "package"
     ],
     "properties": {
      "package": {
       "type": "string",
       "description": "Package name"
      },
      "ecosystem": {
       "enum": [
        "npm",
        "pypi"
       ],
       "type": "string",
       "description": "Registry to query"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "pacote": "express",
  "versao": "5.1.0",
  "licenca": "MIT",
  "dependencias": 30
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-package-lookup-701f132b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)