# NuGet Package Status Oracle

> NuGet Package Status Oracle is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the current latest version, publish date, and URL for a specified .NET NuGet package, resolved live from the NuGet registry.

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/nuget/status
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nuget-package-status-oracle-5ad20645
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XI7oCkhCinFjPp9V02oE6

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 nuget-package-status-oracle-5ad20645
```

Example prompt: What's the latest version of the Newtonsoft.Json NuGet package and when was it published? Check live from NuGet using the package name Newtonsoft.Json.

## When to prefer this

Use this endpoint when you need live, current release metadata (version, publish date, URL) for a specific .NET NuGet package. Prefer it over static databases or cached sources when freshness matters, such as dependency auditing, changelog monitoring, or checking if a project is using an outdated package version.

## Known failure modes

- Package name not found on NuGet — returns empty or error entity
- Missing both 'id' and 'package' query parameters — returns error or entity listing
- NuGet registry unreachable — upstream timeout or error
- Invalid package name format — may return no results or error

## How this service works

Look up the current published version of any .NET NuGet package on NuGet (.NET) — latest version string, release date, and repo/docs URL. Answers "what is the newest version of Newtonsoft.Json, Serilog, AutoMapper, Polly?" for .csproj / PackageReference pinning. Use ?package=<name> (resolved live).

## Output

Returns a JSON object containing the entity record for the requested NuGet package, including its latest version string, publish date, and the package URL on nuget.org.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "id": {
       "type": "string",
       "description": "entityId to look up; omit to list tracked entities"
      },
      "package": {
       "type": "string",
       "description": "Any NuGet (.NET) package name — resolved and fetched live if not already tracked"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "entity": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nuget-package-status-oracle-5ad20645/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracles-production.up.railway.app](https://www.zero.xyz/host/oracles-production.up.railway.app/llms.txt)