# SignalDesk AI – NuGet Package Version Lookup

> SignalDesk AI – NuGet Package Version Lookup is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-13).

Fetches the list of published versions for a given NuGet package, returning the latest versions and total version count from the NuGet public registry.

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/dev/nuget-versions?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-nuget-package-version-lookup-f44a92a1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qtjDsTuySAKkJ4Qj49tPv

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-nuget-package-version-lookup-f44a92a1
```

Example prompt: What are the latest versions of Newtonsoft.Json on NuGet? Show me the top 5.

## When to prefer this

Use this endpoint when you need fast, structured NuGet version data for a specific package without setting up your own NuGet API integration. Prefer it over scraping nuget.org directly or calling the NuGet v3 API yourself, especially when you need the data already transformed and limited to recent versions.

## Known failure modes

- Package name not found on NuGet — returns empty or error response
- Invalid or missing 'package' query parameter — request rejected
- Limit exceeds maximum of 20 — validation error
- NuGet upstream API unavailable — returns upstream error
- Rate limiting or quota exhaustion on the worker — payment or quota error

## 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 containing the package name, total number of published versions, a list of the latest version strings (up to the requested limit), and source metadata including the NuGet source URL, fetch timestamp, and expiry time.

## 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": {
      "limit": {
       "type": "integer",
       "maximum": 20,
       "minimum": 1,
       "description": "Results, default 5."
      },
      "package": {
       "type": "string",
       "maxLength": 200,
       "minLength": 1,
       "description": "Package name."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": {
   "provider": "NuGet public metadata",
   "expires_at": "2026-10-02T10:44:48.855Z",
   "fetched_at": "2026-10-02T09:44:48.855Z",
   "source_url": "https://api.nuget.org/v3-flatcontainer/newtonsoft.json/index.json",
   "transformed": true
  },
  "package": "newtonsoft.json",
  "total_versions": 86,
  "latest_versions": [
   "14.0.1-beta2",
   "14.0.1-beta1",
   "13.0.5-beta1",
   "13.0.4",
   "13.0.4-beta1"
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-nuget-package-version-lookup-f44a92a1/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)