Asin 0.1.0

Asin .NET SDK

The official .NET SDK for the Asin Amazon price tracking API.

Track Amazon prices and products with a scheduled watchlist, price history, offers and alerts.

The SDK exposes 11 typed async methods, one per documented endpoint (with required properties checked at compile time), plus a generic RequestAsync.

Requirements

• .NET 8 or newer

Installation

dotnet add package Asin

Get your API key

Sign up for Asin or sign in, then copy your API key from the dashboard. new AsinClient() reads the ASIN_API_KEY environment variable.

Quick start

using Asin;

using var client = new AsinClient();
var response = await client.SearchAmazonAsync(new SearchAmazonParams { Query = "wireless earbuds" });
Console.WriteLine(response.Json);

Parameter classes mirror the API reference. Use response.Deserialize<MyType>() to map the JSON onto your own types.

HTTP methods

Each method uses the HTTP verb of its endpoint. GET and DELETE send parameters in the query string; POST and PATCH send them as a JSON body, except wait on /products/{id}/check, which stays in the query string. Null values are never sent, so target_price cannot be removed through the SDK yet.

Any endpoint

var response = await client.RequestAsync("GET", "/account");

Errors

try
{
    await client.SearchAmazonAsync(new SearchAmazonParams { Query = "wireless earbuds" });
}
catch (AsinApiException exception)
{
    Console.Error.WriteLine($"{exception.StatusCode}: {exception.Message}");
}

All of them derive from AsinException. Caller cancellation surfaces as OperationCanceledException.

Retries

Requests are retried up to 3 times after a network error, a 408, 429, 500, 502, 503 or 504. Other statuses, such as 400, 401, 402 or 404, and client-side timeouts are not retried. The delay starts at 1 second and grows 1.5× per retry (capped at 30 seconds); a Retry-After header wins.

using var client = new AsinClient(new AsinClientOptions { MaxRetries = 5, RetryDelay = TimeSpan.FromMilliseconds(500) });
await client.SearchAmazonAsync(new SearchAmazonParams { Query = "wireless earbuds" }, new RequestOptions { MaxRetries = 0 }); // one request without retries

Batch requests

BatchAsync runs a function per item with at most 10 in flight (concurrency) and returns one BatchResult per item, in input order. A failing item never stops the others.

string[] inputs = { "wireless earbuds", "mechanical keyboard", "usb-c hub" };
var results = await client.BatchAsync(inputs, (value, ct) =>
    client.SearchAmazonAsync(new SearchAmazonParams { Query = value }, cancellationToken: ct), concurrency: 5);
foreach (var result in results)
{
    if (result.Ok)
    {
        Console.WriteLine(result.Value!.Json);
    }
    else
    {
        Console.Error.WriteLine($"{inputs[result.Index]}: {result.Error!.Message}");
    }
}

Configuration

using var client = new AsinClient(new AsinClientOptions
{
    ApiKey = Environment.GetEnvironmentVariable("ASIN_API_KEY"),
    Timeout = TimeSpan.FromSeconds(60), // default 120 s
    HttpClient = myHttpClient,           // optional, you keep ownership
});

Endpoints

11 methods, generated from the OpenAPI document.

License

MIT — see LICENSE.