ASP.NET Core

{  "Firecrawl": {    "ApiKey": "fc-YOUR-API-KEY",    "BaseUrl": "https://api.firecrawl.dev/v2"  }}

export Firecrawl__ApiKey=fc-YOUR-API-KEY

using System.Net.Http.Headers;using System.Text;using System.Text.Json;public class FirecrawlService{    private readonly HttpClient _http;    private readonly string _baseUrl;    public FirecrawlService(IConfiguration config)    {        _baseUrl = config["Firecrawl:BaseUrl"] ?? "https://api.firecrawl.dev/v2";        _http = new HttpClient();        _http.DefaultRequestHeaders.Authorization =            new AuthenticationHeaderValue("Bearer", config["Firecrawl:ApiKey"]);    }    public async Task<JsonDocument> SearchAsync(string query, int limit = 5)    {        var content = new StringContent(            JsonSerializer.Serialize(new { query, limit }),            Encoding.UTF8, "application/json");        var response = await _http.PostAsync($"{_baseUrl}/search", content);        response.EnsureSuccessStatusCode();        return JsonDocument.Parse(await response.Content.ReadAsStringAsync());    }    public async Task<JsonDocument> ScrapeAsync(string url)    {        var content = new StringContent(            JsonSerializer.Serialize(new { url }),            Encoding.UTF8, "application/json");        var response = await _http.PostAsync($"{_baseUrl}/scrape", content);        response.EnsureSuccessStatusCode();        return JsonDocument.Parse(await response.Content.ReadAsStringAsync());    }    public async Task<JsonDocument> InteractAsync(string url, string prompt, string? followUp = null)    {        // 1. Scrape to open a browser session        var scrapeContent = new StringContent(            JsonSerializer.Serialize(new { url, formats = new[] { "markdown" } }),            Encoding.UTF8, "application/json");        var scrapeRes = await _http.PostAsync($"{_baseUrl}/scrape", scrapeContent);        scrapeRes.EnsureSuccessStatusCode();        var scrapeDoc = JsonDocument.Parse(await scrapeRes.Content.ReadAsStringAsync());        var scrapeId = scrapeDoc.RootElement            .GetProperty("data").GetProperty("metadata").GetProperty("scrapeId").GetString();        // 2. Send first prompt        var firstPrompt = new StringContent(            JsonSerializer.Serialize(new { prompt }),            Encoding.UTF8, "application/json");        await _http.PostAsync($"{_baseUrl}/scrape/{scrapeId}/interact", firstPrompt);        // 3. Send follow-up prompt        JsonDocument? result = null;        if (followUp != null)        {            var followUpContent = new StringContent(                JsonSerializer.Serialize(new { prompt = followUp }),                Encoding.UTF8, "application/json");            var followUpRes = await _http.PostAsync(                $"{_baseUrl}/scrape/{scrapeId}/interact", followUpContent);            followUpRes.EnsureSuccessStatusCode();            result = JsonDocument.Parse(await followUpRes.Content.ReadAsStringAsync());        }        // 4. Close the session        await _http.DeleteAsync($"{_baseUrl}/scrape/{scrapeId}/interact");        return result ?? scrapeDoc;    }}

var builder = WebApplication.CreateBuilder(args);builder.Services.AddSingleton<FirecrawlService>();var app = builder.Build();app.MapPost("/api/search", async (FirecrawlService firecrawl, SearchRequest req) =>{    var result = await firecrawl.SearchAsync(req.Query, req.Limit);    return Results.Ok(result.RootElement);});app.MapPost("/api/scrape", async (FirecrawlService firecrawl, ScrapeRequest req) =>{    var result = await firecrawl.ScrapeAsync(req.Url);    return Results.Ok(result.RootElement);});app.MapPost("/api/interact", async (FirecrawlService firecrawl, InteractRequest req) =>{    var result = await firecrawl.InteractAsync(req.Url, req.Prompt, req.FollowUp);    return Results.Ok(result.RootElement);});app.Run();record SearchRequest(string Query, int Limit = 5);record ScrapeRequest(string Url);record InteractRequest(string Url, string Prompt, string? FollowUp = null);

dotnet run

# Search the webcurl -X POST http://localhost:5000/api/search \  -H "Content-Type: application/json" \  -d '{"query": "firecrawl web scraping"}'# Scrape a pagecurl -X POST http://localhost:5000/api/scrape \  -H "Content-Type: application/json" \  -d '{"url": "https://example.com"}'# Interact with a pagecurl -X POST http://localhost:5000/api/interact \  -H "Content-Type: application/json" \  -d '{"url": "https://www.amazon.com", "prompt": "Search for iPhone 16 Pro Max", "followUp": "Click on the first result and tell me the price"}'