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.NET library for the DeepXL API: fraud detection, document parsing, and ID verification.

Source (monorepo)

SDK source lives in backend-mono under sdks/dotnet

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Requirements

  • .NET 8.0 or later

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Installation

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From source

cd sdks/dotnet/DeepXL
dotnet pack
Reference the built package or add a project reference to DeepXL/DeepXL.csproj.

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NuGet (when published)

<PackageReference Include="DeepXL" Version="1.0.0" />

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Example

Create an API key in the DeepXL Dashboard (Settings → API Keys).
Treat your API key like any environment secret. Do not commit to a public repository or store in plain text.
using DeepXL;
using System.Text.Json;

var apiKey = Environment.GetEnvironmentVariable("DEEPXL_API_KEY")
    ?? throw new InvalidOperationException("Set DEEPXL_API_KEY environment variable.");
var client = new DeepXLClient(apiKey);

var usage = await client.CheckUsageAsync();
var detection = await client.DetectFileAsync("document", "./file.pdf");
var parsed = await client.ParseFileAsync("light", "./id.pdf");
var verification = await client.VerifyFilesAsync("./id.jpg", "./selfie.jpg");

Console.WriteLine(detection.RootElement.GetProperty("likelihood").GetDouble());
Console.WriteLine(parsed.RootElement.GetProperty("documentType").GetString());
Console.WriteLine(verification.RootElement.GetProperty("verified").GetBoolean());
For long-running requests (e.g. large files), use a custom HttpClient with a longer timeout: 
var apiKey = Environment.GetEnvironmentVariable("DEEPXL_API_KEY")
    ?? throw new InvalidOperationException("Set DEEPXL_API_KEY environment variable.");
var http = new HttpClient { BaseAddress = new Uri("https://api.deepxl.ai/v1/"), Timeout = TimeSpan.FromSeconds(120) };
http.DefaultRequestHeaders.Add("x-api-key", apiKey);
var client = new DeepXLClient(http);

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Client methods

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Account

  • CheckUsageAsync() – GET /v1/account. Returns UsageResponse (usage and limits per media type). Optional fields: parsingUsageLimit, parsingUsage.

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Models

  • GetDetectionModelsAsync() – GET /v1/detection-models. Returns JsonDocument.
  • GetParsingModelsAsync() – GET /v1/parsing-models. Returns JsonDocument.

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Fraud detection

  • DetectAsync(modelName, fileName, fileData [, tags]) / DetectFileAsync(modelName, filePath [, tags]) – POST /v1/detection. Models: document, object. Returns JsonDocument.
  • GetDetectionAsync(detectionId) – GET /v1/detection/. Returns JsonDocument.
  • ListDetectionsAsync([param]) – GET /v1/detection. Params: ListParams with limit, offset, sortBy, direction, tagFilter. Returns JsonDocument with totalCount, count, data.

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Document parsing

  • ParseAsync(modelName, fileName, fileData [, tags]) / ParseFileAsync(modelName, filePath [, tags]) – POST /v1/parse. Models: light, performance. Returns JsonDocument.
  • GetParseAsync(parseId) – GET /v1/parse/. Returns JsonDocument.
  • ListParsesAsync([param]) – GET /v1/parse. Returns JsonDocument with totalCount, count, data.

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ID verification

  • VerifyAsync(idFileName, idFileData, selfieFileName, selfieFileData [, tags]) / VerifyFilesAsync(idFilePath, selfieFilePath [, tags]) – POST /v1/verification. Returns JsonDocument.
  • GetVerificationAsync(verificationId) – GET /v1/verification/. Returns JsonDocument.
  • ListVerificationsAsync([param]) – GET /v1/verification. Returns JsonDocument with totalCount, count, data.

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File retrieval

  • GetFileAsync(fileName) – GET /v1/files/. Returns byte[]. Use the file name from the files array in any analysis response.

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Types

  • UsageResponse – ImageUsageLimit, ImageUsage, VideoUsageLimit, VideoUsage, AudioUsageLimit, AudioUsage, DocumentUsageLimit, DocumentUsage, and optionally ParsingUsageLimit, ParsingUsage.
  • ListParams – Limit, Offset, SortBy, Direction, TagFilter.

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Errors

On API or network failure the client throws DeepXLException with an optional StatusCode. Parse error responses from the API when present.