```yaml
product: AlterLab
title: "SDK (Software Development Kit) — Web Scraping Glossary | AlterLab"
comparison_context: "AlterLab is an alternative to Firecrawl, ScrapingBee, and Bright Data."
source_url: https://alterlab.io/glossary/sdk
```

tool

# SDK (Software Development Kit)

An SDK is a set of libraries, code samples, and documentation that simplifies integrating a platform's API into a specific programming language or framework.

SDKs abstract away the low-level HTTP mechanics of an API — authentication, request signing, error handling, retries, and response parsing — so developers can call platform functionality with idiomatic language constructs. Instead of constructing a raw HTTP POST with headers and JSON body, a developer using an SDK calls a function like `client.scrape(url)` and receives a typed response object.

AlterLab provides SDKs for Python and Node.js that wrap the REST API. The SDK handles API key injection via an environment variable, implements automatic retries with exponential backoff, deserialises responses into typed objects, and provides async variants for high-throughput use cases.

SDKs also improve developer experience through IDE auto-complete (when the SDK is strongly typed), inline documentation, and error classes that distinguish between authentication failures, rate limits, and server errors without parsing raw HTTP status codes.

### What is SDK (Software Development Kit)?

An SDK is a set of libraries, code samples, and documentation that simplifies integrating a platform's API into a specific programming language or framework.

### How does AlterLab handle SDK (Software Development Kit)?

SDKs also improve developer experience through IDE auto-complete (when the SDK is strongly typed), inline documentation, and error classes that distinguish between authentication failures, rate limits, and server errors without parsing raw HTTP status codes.

## Examples

```
# AlterLab Python SDK example
from alterlab import AlterLab

client = AlterLab()  # reads ALTERLAB_API_KEY from env
result = client.scrape("https://example.com/product",
                       extract={"price": "span.price", "name": "h1"})
print(result.data["price"])
```

## Related Terms

[REST APIA web service that exposes data and actions through standard HTTP methods and resource-oriented URLs, returning structured JSON responses.](https://alterlab.io/glossary/rest-api)[API AuthenticationThe mechanisms used to verify the identity of callers making requests to an API, typically via API keys, OAuth tokens, or JWT.](https://alterlab.io/glossary/api-authentication)[Scraping APIA managed web scraping service that abstracts proxy rotation, JavaScript rendering, and automatic website compatibility into a single HTTP endpoint.](https://alterlab.io/glossary/scraping-api)[Retry LogicAutomated re-sending of failed requests with backoff strategies, essential for handling transient errors, rate limits, and flaky anti-bot challenges.](https://alterlab.io/glossary/retry-logic)[Rate LimitingA server-side control that caps the number of requests accepted from a single IP or session within a time window, returning HTTP 429 when exceeded.](https://alterlab.io/glossary/rate-limiting)

## Extract SDK (Software Development Kit) data from any website

AlterLab returns clean, structured data from any public URL — no scraper infrastructure needed. Start free, no credit card required.

[View API docs](https://alterlab.io/docs/api/rest)

[Back to Glossary](https://alterlab.io/glossary)