> ## Documentation Index
> Fetch the complete documentation index at: https://firecrawl-fix-js-response-syntax-highlighting.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# .NET

> Comece a usar o Firecrawl com .NET. Faça scraping, buscas e interaja com dados da web usando a API REST.

<div id="prerequisites">
  ## Pré-requisitos
</div>

* .NET 6.0+
* Uma chave de API do Firecrawl — [obtenha uma gratuitamente](https://www.firecrawl.dev/app/api-keys)

<div id="search-the-web">
  ## Fazer uma busca na web
</div>

O Firecrawl funciona com .NET por meio da API REST, usando `HttpClient`.

```csharp theme={null}
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;

var apiKey = Environment.GetEnvironmentVariable("FIRECRAWL_API_KEY");
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", apiKey);

var content = new StringContent(
    JsonSerializer.Serialize(new { query = "firecrawl web scraping", limit = 5 }),
    Encoding.UTF8,
    "application/json"
);

var response = await client.PostAsync("https://api.firecrawl.dev/v2/search", content);
var json = await response.Content.ReadAsStringAsync();
Console.WriteLine(json);
```

<Accordion title="Exemplo de resposta">
  ```json theme={null}
  {
    "success": true,
    "data": {
      "web": [
        {
          "url": "https://docs.firecrawl.dev",
          "title": "Firecrawl Documentation",
          "markdown": "# Firecrawl\n\nFirecrawl is a web scraping API..."
        }
      ]
    }
  }
  ```
</Accordion>

<div id="scrape-a-page">
  ## Fazer scraping em uma página
</div>

```csharp theme={null}
var scrapeContent = new StringContent(
    JsonSerializer.Serialize(new { url = "https://example.com" }),
    Encoding.UTF8,
    "application/json"
);

var scrapeResponse = await client.PostAsync("https://api.firecrawl.dev/v2/scrape", scrapeContent);
var scrapeJson = await scrapeResponse.Content.ReadAsStringAsync();

using var doc = JsonDocument.Parse(scrapeJson);
var markdown = doc.RootElement.GetProperty("data").GetProperty("markdown").GetString();
Console.WriteLine(markdown);
```

<Accordion title="Exemplo de resposta">
  ```json theme={null}
  {
    "success": true,
    "data": {
      "markdown": "# Example Domain\n\nThis domain is for use in illustrative examples...",
      "metadata": {
        "title": "Example Domain",
        "sourceURL": "https://example.com"
      }
    }
  }
  ```
</Accordion>

<div id="interact-with-a-page">
  ## Interaja com uma página
</div>

Inicie uma sessão no navegador, interaja com a página usando comandos em linguagem natural e, em seguida, encerre a sessão.

<div id="step-1-scrape-to-start-a-session">
  ### Etapa 1 — Faça scraping para iniciar uma sessão
</div>

```csharp theme={null}
var sessionContent = new StringContent(
    JsonSerializer.Serialize(new { url = "https://www.amazon.com", formats = new[] { "markdown" } }),
    Encoding.UTF8,
    "application/json"
);

var sessionResponse = await client.PostAsync("https://api.firecrawl.dev/v2/scrape", sessionContent);
var sessionJson = await sessionResponse.Content.ReadAsStringAsync();

using var sessionDoc = JsonDocument.Parse(sessionJson);
var scrapeId = sessionDoc.RootElement
    .GetProperty("data")
    .GetProperty("metadata")
    .GetProperty("scrapeId")
    .GetString();

Console.WriteLine($"scrapeId: {scrapeId}");
```

<div id="step-2-send-interactions">
  ### Etapa 2 — Enviar interações
</div>

```csharp theme={null}
var interactUrl = $"https://api.firecrawl.dev/v2/scrape/{scrapeId}/interact";

// Buscar um produto
var searchBody = new StringContent(
    JsonSerializer.Serialize(new { prompt = "Search for iPhone 16 Pro Max" }),
    Encoding.UTF8,
    "application/json"
);

var searchResult = await client.PostAsync(interactUrl, searchBody);
Console.WriteLine(await searchResult.Content.ReadAsStringAsync());

// Clicar no primeiro resultado
var clickBody = new StringContent(
    JsonSerializer.Serialize(new { prompt = "Click on the first result and tell me the price" }),
    Encoding.UTF8,
    "application/json"
);

var clickResult = await client.PostAsync(interactUrl, clickBody);
Console.WriteLine(await clickResult.Content.ReadAsStringAsync());
```

<div id="step-3-stop-the-session">
  ### Etapa 3 — Encerre a sessão
</div>

```csharp theme={null}
await client.DeleteAsync(interactUrl);
Console.WriteLine("Sessão encerrada");
```

<div id="reusable-client-class">
  ## Classe de cliente reutilizável
</div>

Para reutilização, encapsule a API em um cliente tipado:

```csharp theme={null}
using System.Net.Http.Headers;
using System.Text;
using System.Text.Json;

public class FirecrawlClient
{
    private readonly HttpClient _http;
    private const string BaseUrl = "https://api.firecrawl.dev/v2";

    public FirecrawlClient(string apiKey)
    {
        _http = new HttpClient();
        _http.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", apiKey);
    }

    private async Task<JsonDocument> PostAsync(string endpoint, object payload)
    {
        var content = new StringContent(
            JsonSerializer.Serialize(payload),
            Encoding.UTF8,
            "application/json"
        );

        var response = await _http.PostAsync($"{BaseUrl}{endpoint}", content);
        response.EnsureSuccessStatusCode();

        var json = await response.Content.ReadAsStringAsync();
        return JsonDocument.Parse(json);
    }

    public async Task<JsonDocument> ScrapeAsync(string url)
    {
        return await PostAsync("/scrape", new { url });
    }

    public async Task<JsonDocument> SearchAsync(string query, int limit = 5)
    {
        return await PostAsync("/search", new { query, limit });
    }
}

// Uso
var firecrawl = new FirecrawlClient(Environment.GetEnvironmentVariable("FIRECRAWL_API_KEY")!);
var result = await firecrawl.SearchAsync("firecrawl web scraping");
Console.WriteLine(result.RootElement);
```

<div id="next-steps">
  ## Próximos passos
</div>

<CardGroup cols={2}>
  <Card title="Documentação de busca" icon="magnifying-glass" href="/pt-BR/features/search">
    Faça uma busca na web e obtenha o conteúdo completo da página
  </Card>

  <Card title="Documentação de scraping" icon="file-lines" href="/pt-BR/features/scrape">
    Todas as opções de scraping, incluindo formatos, ações e proxies
  </Card>

  <Card title="Documentação de interação" icon="hand-pointer" href="/pt-BR/features/interact">
    Clique, preencha formulários e extraia conteúdo dinâmico
  </Card>

  <Card title="Referência da API" icon="code" href="/pt-BR/api-reference/v2-introduction">
    Documentação completa da API REST
  </Card>
</CardGroup>