# NuGet API

> NuGet returns package details, recent versions, and download counts as a workflow and API.

Get package looks up NuGet by package name or nuget.org link and returns package details, versions, and download data. Version history includes the 10 most recent versions, including prereleases; details describe the latest stable release when one exists.

- Page: https://fous.com/tools/nuget
- Handle: `@nuget`
- Category: [Developer tools](https://fous.com/tools/category/developer-tools)
- Source website: https://nuget.org
- Last verified: Sep 29, 2026

## Methods

### Get package

Operation `get_package`, version 1. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.

Look up a NuGet package by name or package link. Inexact names match the top search result; version history includes prereleases, while package details describe the latest stable release when one exists.

**Input**

| Field | Type | Required | Example | Description |
|---|---|---|---|---|
| `package` | string | yes | `"https://www.nuget.org/packages/Serilog"` | Package name or nuget.org package link, for example Newtonsoft.Json or https://www.nuget.org/packages/Newtonsoft.Json. |

**Input schema**

```json
{
  "type": "object",
  "required": [
    "package"
  ],
  "properties": {
    "package": {
      "type": "string",
      "description": "Package name or nuget.org package link, for example Newtonsoft.Json or https://www.nuget.org/packages/Newtonsoft.Json.",
      "examples": [
        "https://www.nuget.org/packages/Serilog",
        "Newtonsoft.Json",
        "json serializer"
      ]
    }
  },
  "additionalProperties": false,
  "examples": [
    {
      "package": "https://www.nuget.org/packages/Serilog"
    },
    {
      "package": "Newtonsoft.Json"
    },
    {
      "package": "json serializer"
    }
  ]
}
```

**Output**

| Field | Type | Example | Description |
|---|---|---|---|
| `owners` | array |  |  |
| `authors` | array |  |  |
| `license` | string or null | `"Apache-2.0"` |  |
| `versions` | array |  | The 10 most recent versions, including prereleases. |
| `versions[].date` | string or null | `"2026-09-13"` |  |
| `versions[].version` | string | `"4.4.1-dev-02447"` |  |
| `versions[].downloads` | integer | `1633` |  |
| `versions[].package_link` | string | `"https://www.nuget.org/packages/Serilog/4.4.1-dev-02447"` |  |
| `description` | string or null | `"Simple .NET logging with fully-structured events"` |  |
| `package_link` | string | `"https://www.nuget.org/packages/Serilog"` |  |
| `package_name` | string | `"Serilog"` | The matched NuGet package name. |
| `project_link` | string or null | `"https://serilog.net/"` |  |
| `total_downloads` | integer | `3319887360` |  |
| `last_updated_date` | string or null | `"2026-07-10"` |  |
| `target_frameworks` | array |  |  |
| `latest_stable_version` | string or null | `"4.4.0"` |  |

**Example input**

```json
{
  "package": "https://www.nuget.org/packages/Serilog"
}
```

**Example output**

```json
{
  "owners": [
    "serilog"
  ],
  "authors": [
    "Serilog Contributors"
  ],
  "license": "Apache-2.0",
  "versions": [
    {
      "date": "2026-09-13",
      "version": "4.4.1-dev-02447",
      "downloads": 1633,
      "package_link": "https://www.nuget.org/packages/Serilog/4.4.1-dev-02447"
    },
    {
      "date": "2026-07-31",
      "version": "4.4.1-dev-02443",
      "downloads": 10270,
      "package_link": "https://www.nuget.org/packages/Serilog/4.4.1-dev-02443"
    },
    {
      "date": "2026-07-31",
      "version": "4.4.1-dependabot-02442",
      "downloads": 3257,
      "package_link": "https://www.nuget.org/packages/Serilog/4.4.1-dependabot-02442"
    }
  ],
  "description": "Simple .NET logging with fully-structured events",
  "package_link": "https://www.nuget.org/packages/Serilog",
  "package_name": "Serilog",
  "project_link": "https://serilog.net/",
  "total_downloads": 3319887360,
  "last_updated_date": "2026-07-10",
  "target_frameworks": [
    ".NET 10.0",
    ".NET Framework 4.6.2",
    ".NET Framework 4.7.1"
  ],
  "latest_stable_version": "4.4.0"
}
```

## Quick start

Replace `YOUR_API_KEY` with a Fous API key. To create one, open Developers at the bottom of Fous Studio, turn on Developer mode, then go to API keys (https://app.fous.com/keys). Change the values in `input` to run the same tool on new data.

```bash
curl 'https://api.fous.com/v1/query' \
  --fail-with-body --silent --show-error --max-time 180 \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "api": "@nuget",
  "visibility": "public",
  "operation": "get_package",
  "version": 1,
  "input": {
    "package": "https://www.nuget.org/packages/Serilog"
  },
  "response": {
    "format": "json"
  }
}'
```

```python
# Save as fous.py and run with python3 fous.py. No packages needed.
import json
import urllib.error
import urllib.request

api_key = "YOUR_API_KEY"

body = json.loads("{\n  \"api\": \"@nuget\",\n  \"visibility\": \"public\",\n  \"operation\": \"get_package\",\n  \"version\": 1,\n  \"input\": {\n    \"package\": \"https://www.nuget.org/packages/Serilog\"\n  },\n  \"response\": {\n    \"format\": \"json\"\n  }\n}")
request = urllib.request.Request(
    "https://api.fous.com/v1/query",
    data=json.dumps(body).encode("utf-8"),
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    method="POST",
)
try:
    with urllib.request.urlopen(request, timeout=180) as response:
        result = json.load(response)
except urllib.error.HTTPError as error:
    raise RuntimeError(f"HTTP {error.code}: {error.read().decode('utf-8', errors='replace')}") from error
if result.get("success") is False:
    raise RuntimeError(result.get("error", {}).get("message", "Request failed"))
print(json.dumps(result["data"]["output"], indent=2))
```

```typescript
// Save as fous.mts and run with npx tsx fous.mts.
const apiKey = "YOUR_API_KEY";

const response = await fetch("https://api.fous.com/v1/query", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${apiKey}`,
    "Content-Type": "application/json",
  },
  signal: AbortSignal.timeout(180_000),
  body: JSON.stringify({
  "api": "@nuget",
  "visibility": "public",
  "operation": "get_package",
  "version": 1,
  "input": {
    "package": "https://www.nuget.org/packages/Serilog"
  },
  "response": {
    "format": "json"
  }
}),
});
type ApiResult = { success: boolean; data?: { output: unknown }; error?: { message: string } };
const result: ApiResult = await response.json();
if (!response.ok || result.success === false) {
  throw new Error(result.error?.message ?? `HTTP ${response.status}`);
}
if (!result.data) throw new Error("Missing API response data");
console.log(result.data.output);
```

## Use from an AI assistant

Connect this tool to Claude Code, Claude Desktop, Cursor, VS Code, Codex and any MCP client as its own MCP server. Each method is a typed tool whose arguments are the method’s input.

- Server URL: `https://api.fous.com/mcp/tools/nuget`
- Authorization: `Authorization: Bearer <Fous API key>`

**Tools**

- `get_package`: Get package. 1 credit per completed call. Failed calls without a completed billing receipt are free; completed work can remain charged if delivery is interrupted.
- `fous_get_run`: the result of a run that was still going, by its `request_id`. Free.

Claude Code:

```bash
claude mcp add --scope user --transport http fous-nuget https://api.fous.com/mcp/tools/nuget --header "Authorization: Bearer ${FOUS_API_KEY:?Set FOUS_API_KEY to your Fous API key}"
```

To give the assistant every tool, connect `https://api.fous.com/mcp`: it finds one with `fous_search_tools` and runs it with `fous_run_tool`. Setup for other clients: https://fous.com/llms-full.txt.

## Use cases

- Check a package’s authors and license
- Compare recent package versions and download counts
- Review target frameworks before evaluating a dependency
- Find a package’s latest stable version
- Check a package’s total downloads

## FAQ

### Can I run it with my own inputs?

Yes. Change the inputs in Studio and press Run, or send new inputs from your code, or ask a connected AI assistant.

### Can I call this NuGet tool as an API?

Yes. Send a POST request to /v1/query with your Fous API key and the inputs, and get JSON back.

### How much does it cost?

Each completed run costs 1 credit. Failed runs without a completed receipt are free; completed work can remain charged if delivery is interrupted. With pay as you go, a credit costs 1¢. Monthly plans cost less per credit.

### Do I need a NuGet account?

No. You only need a Fous account.

### How current is the data?

Fous gets the data from nuget.org when you run it. Some results are reused for up to 24 hours, and results that use your account or key are never reused. It was last verified on Sep 29, 2026.

### What are a package’s most recent versions?

Get package returns the 10 most recent versions, including prereleases, with version numbers and dates.

### How many times has a package been downloaded?

Get package returns total package downloads and download counts for recent versions.

### Which frameworks does a package target?

Get package returns the package’s target frameworks.

## Related

- [npm API](https://fous.com/tools/npm.md): npm provides package details, search results and latest versions, plus weekly download and publish data; daily and historical download counts may lag by a day or more.
- [PyPI API](https://fous.com/tools/pypi.md): PyPI provides package metadata, links, and current/latest plus 10 recent versions; release dates reflect first file uploads, and keyword searches return up to 100 packages.
- [RubyGems API](https://fous.com/tools/rubygems.md): Discover and share Ruby gems.
- [GitHub API](https://fous.com/tools/github.md): GitHub returns public repository matches and details, up to 25 trending projects, issues, pull requests, and newest-first published releases; release or commit dates may be unavailable.
- [VS Code Marketplace API](https://fous.com/tools/vs-code-marketplace.md): Public listings for Visual Studio Code extensions.
- [crates.io API](https://fous.com/tools/crates-io.md): crates.io is the Rust community package registry, returning current crate details and recent releases or up to 100 keyword-matched crates with version, download, and update information.
- [Microsoft Store API](https://fous.com/tools/microsoft-store.md): Microsoft Store returns app and game listings, country-specific searches, and ranked charts; update notes, purchase prices, and exact rating counts may be unavailable.
- [Docker Hub API](https://fous.com/tools/docker-hub.md): Docker Hub helps find and publish container images, search public images, and view image details and recently updated tags; pull totals may lag or be unavailable.
- [All Developer tools tools](https://fous.com/tools/category/developer-tools)