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The official .NET SDK for Spidra lets you extract structured data from any website by describing what you want in plain English. It handles JavaScript rendering, anti-bot bypass, and CAPTCHA solving as a managed API, so your code stays focused on the data.

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Installation

dotnet add package Spidra
Requires .NET 8 or later.
Get your API key from app.spidra.io under Settings → API Keys. Keep your API key out of source control — read it from an environment variable or a secrets manager.

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Getting started

All requests require an API key. Pass it to the client at initialization: 
var client = new SpidraClient(Environment.GetEnvironmentVariable("SPIDRA_API_KEY")!);

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Quick start

using Spidra;
using Spidra.Types.Scrape;

var client = new SpidraClient(Environment.GetEnvironmentVariable("SPIDRA_API_KEY")!);

var job = await client.Scrape.RunAsync(new ScrapeParams
{
    Urls = [new ScrapeUrl("https://news.ycombinator.com")],
    Prompt = "List the top 5 stories with title, points, and comment count",
    UseProxy = true
});

Console.WriteLine(job.Result.Content);
RunAsync submits the job and polls until it completes, then returns the result.

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Scraping

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RunAsync — submit and wait

var job = await client.Scrape.RunAsync(new ScrapeParams
{
    Urls   = [new ScrapeUrl("https://example.com/pricing")],
    Prompt = "Extract all pricing plans with name, price, and included features",
    Output = OutputFormat.Json
});

Console.WriteLine(job.Result.Content);
Parameters
PropertyTypeDescription
UrlsScrapeUrl[]Up to 3 URLs, each with optional per-URL browser actions
PromptstringAI extraction instruction
OutputOutputFormatOutputFormat.Markdown (default) or OutputFormat.Json
SchemaJsonElement?JSON Schema for guaranteed output shape
UseProxyboolRoute through a residential proxy
ProxyCountrystring?Two-letter country code, e.g. "us", "de", "jp"
ExtractContentOnlyboolStrip navigation, ads, and boilerplate before AI extraction
ScreenshotboolCapture a screenshot of the page
FullPageScreenshotboolCapture a full-page (scrolled) screenshot
Cookiesstring?Raw Cookie header string for authenticated pages

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SubmitAsync + GetAsync — manual control

If you need to track progress yourself, use SubmitAsync and GetAsync directly: 
var job = await client.Scrape.SubmitAsync(new ScrapeParams
{
    Urls   = [new ScrapeUrl("https://example.com")],
    Prompt = "Extract the main heading"
});

Console.WriteLine($"Job submitted: {job.JobId}");

while (job.Status is not ("completed" or "failed"))
{
    await Task.Delay(TimeSpan.FromSeconds(2));
    job = await client.Scrape.GetAsync(job.JobId);
    Console.WriteLine($"Status: {job.Status}");
}
Job statuses: waiting · active · completed · failed

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Structured output

Pass a JSON schema to get a typed, deserializable result instead of raw text: 
using System.Text.Json;

var job = await client.Scrape.RunAsync(new ScrapeParams
{
    Urls   = [new ScrapeUrl("https://jobs.example.com/senior-engineer")],
    Prompt = "Extract the job title, company, location, and required skills",
    Output = OutputFormat.Json,
    Schema = JsonSerializer.SerializeToElement(new
    {
        type     = "object",
        required = new[] { "title", "company" },
        properties = new
        {
            title    = new { type = "string" },
            company  = new { type = "string" },
            location = new { type = new[] { "string", "null" } },
            skills   = new { type = "array", items = new { type = "string" } }
        }
    })
});

var listing = job.Result.Content.Deserialize<JobListing>(new JsonSerializerOptions
{
    PropertyNameCaseInsensitive = true
});

Console.WriteLine($"{listing!.Title} at {listing.Company}");
Console.WriteLine($"Skills: {string.Join(", ", listing.Skills)}");

record JobListing(string Title, string Company, string? Location, List<string> Skills);
Fields in required always appear in the response (as null if the data is not found). Optional fields are omitted when unavailable.

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Batch scraping

Process up to 50 URLs in one call. All URLs are processed in parallel. 
using Spidra.Types.Batch;

var batch = await client.Batch.RunAsync(new BatchScrapeParams
{
    Urls =
    [
        "https://competitor-a.com/pricing",
        "https://competitor-b.com/pricing",
        "https://competitor-c.com/pricing"
    ],
    Prompt   = "Extract all pricing plans with name and monthly price",
    Output   = OutputFormat.Json,
    UseProxy = true
});

var succeeded = batch.Items.Where(i => i.Status == "completed").ToList();
Console.WriteLine($"{succeeded.Count}/{batch.Items.Count} succeeded");

foreach (var item in succeeded)
{
    Console.WriteLine($"{item.Url}: {item.Result}");
}
Item statuses: pending · running · completed · failed Batch statuses: pending · running · completed · failed · cancelled

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Retry failed items

if (batch.Items.Any(i => i.Status == "failed"))
    await client.Batch.RetryAsync(batch.BatchId);

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Crawling

Crawl an entire site and extract structured data from each page. 
using Spidra.Types.Crawl;

var job = await client.Crawl.RunAsync(new CrawlParams
{
    BaseUrl              = "https://example.com/blog",
    CrawlInstruction     = "Find all blog posts published in 2024",
    TransformInstruction = "Extract title, author, publish date, and summary",
    MaxPages             = 30,
    UseProxy             = true
});

foreach (var page in job.Result)
{
    Console.WriteLine($"{page.Url}: {page.Data}");
}
Parameters
PropertyTypeDescription
BaseUrlstringStarting URL for the crawl
CrawlInstructionstringWhich links to follow and which to skip
TransformInstructionstringWhat to extract from each page
MaxPagesintMaximum number of pages to crawl
UseProxyboolRoute through a residential proxy
ProxyCountrystring?Two-letter country code, e.g. "us"
Cookiesstring?Raw Cookie header string for authenticated sites

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Error handling

All exceptions inherit from SpidraException.
ExceptionWhen
SpidraAuthenticationException401 — invalid or missing API key
SpidraInsufficientCreditsException402 — not enough credits
SpidraRateLimitException429 — rate limit exceeded
SpidraServerException5xx — server-side error
using Spidra.Exceptions;

try
{
    var job = await client.Scrape.RunAsync(scrapeParams);
    return job.Result.Content;
}
catch (SpidraAuthenticationException)
{
    logger.LogError("Invalid API key. Check your SPIDRA_API_KEY.");
    throw;
}
catch (SpidraInsufficientCreditsException)
{
    logger.LogWarning("Out of scraping credits. Upgrade at spidra.io.");
    throw;
}
catch (SpidraRateLimitException ex)
{
    await Task.Delay(ex.RetryAfter ?? TimeSpan.FromSeconds(5));
    // retry...
}
catch (SpidraServerException)
{
    logger.LogError("Spidra server error.");
    throw;
}
SpidraRateLimitException.RetryAfter contains the server-suggested wait time when available.

Elixir

Official Elixir SDK — idiomatic pattern matching, OTP-ready, works with Phoenix and plain Mix projects.

Swift

Official Swift SDK — async/await native, works on iOS, macOS, tvOS, watchOS, and server-side Swift.