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Scrapegraphai Java API Library

Maven Central javadoc

The Scrapegraphai Java SDK provides convenient access to the Scrapegraphai REST API from applications written in Java.

It is generated with Stainless.

The REST API documentation can be found on scrapegraphai.com. Javadocs are available on javadoc.io.

Installation

Gradle

implementation("com.scrapegraphai.api:scrapegraphai-java:0.0.2")

Maven

<dependency>
  <groupId>com.scrapegraphai.api</groupId>
  <artifactId>scrapegraphai-java</artifactId>
  <version>0.0.2</version>
</dependency>

Requirements

This library requires Java 8 or later.

Usage

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;
import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;

// Configures using the `scrapegraphai.apiKey` and `scrapegraphai.baseUrl` system properties
// Or configures using the `SCRAPEGRAPHAI_API_KEY` and `SCRAPEGRAPHAI_BASE_URL` environment variables
ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.fromEnv();

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt("Extract the product name, price, and description")
    .build();
CompletedSmartscraper completedSmartscraper = client.smartscraper().create(params);

Client configuration

Configure the client using system properties or environment variables:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

// Configures using the `scrapegraphai.apiKey` and `scrapegraphai.baseUrl` system properties
// Or configures using the `SCRAPEGRAPHAI_API_KEY` and `SCRAPEGRAPHAI_BASE_URL` environment variables
ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.fromEnv();

Or manually:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .apiKey("My API Key")
    .build();

Or using a combination of the two approaches:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    // Configures using the `scrapegraphai.apiKey` and `scrapegraphai.baseUrl` system properties
    // Or configures using the `SCRAPEGRAPHAI_API_KEY` and `SCRAPEGRAPHAI_BASE_URL` environment variables
    .fromEnv()
    .apiKey("My API Key")
    .build();

See this table for the available options:

Setter System property Environment variable Required Default value
apiKey scrapegraphai.apiKey SCRAPEGRAPHAI_API_KEY true -
baseUrl scrapegraphai.baseUrl SCRAPEGRAPHAI_BASE_URL true "https://api.scrapegraphai.com/v1"

System properties take precedence over environment variables.

Tip

Don't create more than one client in the same application. Each client has a connection pool and thread pools, which are more efficient to share between requests.

Modifying configuration

To temporarily use a modified client configuration, while reusing the same connection and thread pools, call withOptions() on any client or service:

import com.scrapegraphai.api.client.ScrapegraphaiClient;

ScrapegraphaiClient clientWithOptions = client.withOptions(optionsBuilder -> {
    optionsBuilder.baseUrl("https://example.com");
    optionsBuilder.maxRetries(42);
});

The withOptions() method does not affect the original client or service.

Requests and responses

To send a request to the Scrapegraphai API, build an instance of some Params class and pass it to the corresponding client method. When the response is received, it will be deserialized into an instance of a Java class.

For example, client.smartscraper().create(...) should be called with an instance of SmartscraperCreateParams, and it will return an instance of CompletedSmartscraper.

Immutability

Each class in the SDK has an associated builder or factory method for constructing it.

Each class is immutable once constructed. If the class has an associated builder, then it has a toBuilder() method, which can be used to convert it back to a builder for making a modified copy.

Because each class is immutable, builder modification will never affect already built class instances.

Asynchronous execution

The default client is synchronous. To switch to asynchronous execution, call the async() method:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;
import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;
import java.util.concurrent.CompletableFuture;

// Configures using the `scrapegraphai.apiKey` and `scrapegraphai.baseUrl` system properties
// Or configures using the `SCRAPEGRAPHAI_API_KEY` and `SCRAPEGRAPHAI_BASE_URL` environment variables
ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.fromEnv();

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt("Extract the product name, price, and description")
    .build();
CompletableFuture<CompletedSmartscraper> completedSmartscraper = client.async().smartscraper().create(params);

Or create an asynchronous client from the beginning:

import com.scrapegraphai.api.client.ScrapegraphaiClientAsync;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClientAsync;
import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;
import java.util.concurrent.CompletableFuture;

// Configures using the `scrapegraphai.apiKey` and `scrapegraphai.baseUrl` system properties
// Or configures using the `SCRAPEGRAPHAI_API_KEY` and `SCRAPEGRAPHAI_BASE_URL` environment variables
ScrapegraphaiClientAsync client = ScrapegraphaiOkHttpClientAsync.fromEnv();

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt("Extract the product name, price, and description")
    .build();
CompletableFuture<CompletedSmartscraper> completedSmartscraper = client.smartscraper().create(params);

The asynchronous client supports the same options as the synchronous one, except most methods return CompletableFutures.

Examples

The scrapegraphai-java-example module contains comprehensive examples demonstrating all SDK features:

Running Examples

Run the basic example:

./gradlew :scrapegraphai-java-example:run

Run specific examples:

# SmartScraper examples
./gradlew :scrapegraphai-java-example:run -Pexample=Smartscraper

# SearchScraper examples  
./gradlew :scrapegraphai-java-example:run -Pexample=Searchscraper

# Crawl examples
./gradlew :scrapegraphai-java-example:run -Pexample=Crawl

# Markdownify examples
./gradlew :scrapegraphai-java-example:run -Pexample=Markdownify

# Async examples
./gradlew :scrapegraphai-java-example:run -Pexample=Async

# Schema Generation examples
./gradlew :scrapegraphai-java-example:run -Pexample=SchemaGeneration

# Utility examples (validation, health, credits)
./gradlew :scrapegraphai-java-example:run -Pexample=Utility

Example Categories

Example Description Features Demonstrated
Main Basic SmartScraper usage Simple scraping, error handling
SmartscraperExample Comprehensive scraping scenarios Custom schemas, pagination, JavaScript rendering, headers/cookies
SearchscraperExample Web search + scraping Multi-source data aggregation, product comparison, news aggregation
CrawlExample Website crawling Site exploration, path filtering, progress monitoring
MarkdownifyExample HTML to Markdown conversion Content formatting, documentation generation
AsyncExample Asynchronous operations Non-blocking requests, parallel processing, error handling
SchemaGenerationExample Automatic schema creation Schema analysis, structured data extraction
UtilityExample Service utilities API validation, health checks, credit monitoring, feedback

Quick Start Example

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;
import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;

// Initialize client (reads from SCRAPEGRAPHAI_API_KEY environment variable)
ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.fromEnv();

// Create scraping request
SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt("Extract the main heading and description")
    .websiteUrl("https://example.com")
    .build();

// Execute scraping
CompletedSmartscraper result = client.smartscraper().create(params);
System.out.println("Extracted data: " + result.result());

Raw responses

The SDK defines methods that deserialize responses into instances of Java classes. However, these methods don't provide access to the response headers, status code, or the raw response body.

To access this data, prefix any HTTP method call on a client or service with withRawResponse():

import com.scrapegraphai.api.core.http.Headers;
import com.scrapegraphai.api.core.http.HttpResponseFor;
import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt("Extract the product name, price, and description")
    .build();
HttpResponseFor<CompletedSmartscraper> completedSmartscraper = client.smartscraper().withRawResponse().create(params);

int statusCode = completedSmartscraper.statusCode();
Headers headers = completedSmartscraper.headers();

You can still deserialize the response into an instance of a Java class if needed:

import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;

CompletedSmartscraper parsedCompletedSmartscraper = completedSmartscraper.parse();

Error handling

The SDK throws custom unchecked exception types:

Logging

The SDK uses the standard OkHttp logging interceptor.

Enable logging by setting the SCRAPEGRAPHAI_LOG environment variable to info:

$ export SCRAPEGRAPHAI_LOG=info

Or to debug for more verbose logging:

$ export SCRAPEGRAPHAI_LOG=debug

ProGuard and R8

Although the SDK uses reflection, it is still usable with ProGuard and R8 because scrapegraphai-java-core is published with a configuration file containing keep rules.

ProGuard and R8 should automatically detect and use the published rules, but you can also manually copy the keep rules if necessary.

Jackson

The SDK depends on Jackson for JSON serialization/deserialization. It is compatible with version 2.13.4 or higher, but depends on version 2.18.2 by default.

The SDK throws an exception if it detects an incompatible Jackson version at runtime (e.g. if the default version was overridden in your Maven or Gradle config).

If the SDK threw an exception, but you're certain the version is compatible, then disable the version check using the checkJacksonVersionCompatibility on ScrapegraphaiOkHttpClient or ScrapegraphaiOkHttpClientAsync.

Caution

We make no guarantee that the SDK works correctly when the Jackson version check is disabled.

Network options

Retries

The SDK automatically retries 2 times by default, with a short exponential backoff between requests.

Only the following error types are retried:

  • Connection errors (for example, due to a network connectivity problem)
  • 408 Request Timeout
  • 409 Conflict
  • 429 Rate Limit
  • 5xx Internal

The API may also explicitly instruct the SDK to retry or not retry a request.

To set a custom number of retries, configure the client using the maxRetries method:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .fromEnv()
    .maxRetries(4)
    .build();

Timeouts

Requests time out after 1 minute by default.

To set a custom timeout, configure the method call using the timeout method:

import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;

CompletedSmartscraper completedSmartscraper = client.smartscraper().create(
  params, RequestOptions.builder().timeout(Duration.ofSeconds(30)).build()
);

Or configure the default for all method calls at the client level:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;
import java.time.Duration;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .fromEnv()
    .timeout(Duration.ofSeconds(30))
    .build();

Proxies

To route requests through a proxy, configure the client using the proxy method:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;
import java.net.InetSocketAddress;
import java.net.Proxy;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .fromEnv()
    .proxy(new Proxy(
      Proxy.Type.HTTP, new InetSocketAddress(
        "https://example.com", 8080
      )
    ))
    .build();

HTTPS

Note

Most applications should not call these methods, and instead use the system defaults. The defaults include special optimizations that can be lost if the implementations are modified.

To configure how HTTPS connections are secured, configure the client using the sslSocketFactory, trustManager, and hostnameVerifier methods:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .fromEnv()
    // If `sslSocketFactory` is set, then `trustManager` must be set, and vice versa.
    .sslSocketFactory(yourSSLSocketFactory)
    .trustManager(yourTrustManager)
    .hostnameVerifier(yourHostnameVerifier)
    .build();

Environments

The SDK sends requests to the production by default. To send requests to a different environment, configure the client like so:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .fromEnv()
    .environment1()
    .build();

Custom HTTP client

The SDK consists of three artifacts:

This structure allows replacing the SDK's default HTTP client without pulling in unnecessary dependencies.

Customized OkHttpClient

Tip

Try the available network options before replacing the default client.

To use a customized OkHttpClient:

  1. Replace your scrapegraphai-java dependency with scrapegraphai-java-core
  2. Copy scrapegraphai-java-client-okhttp's OkHttpClient class into your code and customize it
  3. Construct ScrapegraphaiClientImpl or ScrapegraphaiClientAsyncImpl, similarly to ScrapegraphaiOkHttpClient or ScrapegraphaiOkHttpClientAsync, using your customized client

Completely custom HTTP client

To use a completely custom HTTP client:

  1. Replace your scrapegraphai-java dependency with scrapegraphai-java-core
  2. Write a class that implements the HttpClient interface
  3. Construct ScrapegraphaiClientImpl or ScrapegraphaiClientAsyncImpl, similarly to ScrapegraphaiOkHttpClient or ScrapegraphaiOkHttpClientAsync, using your new client class

Undocumented API functionality

The SDK is typed for convenient usage of the documented API. However, it also supports working with undocumented or not yet supported parts of the API.

Parameters

To set undocumented parameters, call the putAdditionalHeader, putAdditionalQueryParam, or putAdditionalBodyProperty methods on any Params class:

import com.scrapegraphai.api.core.JsonValue;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .putAdditionalHeader("Secret-Header", "42")
    .putAdditionalQueryParam("secret_query_param", "42")
    .putAdditionalBodyProperty("secretProperty", JsonValue.from("42"))
    .build();

These can be accessed on the built object later using the _additionalHeaders(), _additionalQueryParams(), and _additionalBodyProperties() methods.

To set undocumented parameters on nested headers, query params, or body classes, call the putAdditionalProperty method on the nested class:

import com.scrapegraphai.api.core.JsonValue;
import com.scrapegraphai.api.models.crawl.CrawlStartParams;

CrawlStartParams params = CrawlStartParams.builder()
    .rules(CrawlStartParams.Rules.builder()
        .putAdditionalProperty("secretProperty", JsonValue.from("42"))
        .build())
    .build();

These properties can be accessed on the nested built object later using the _additionalProperties() method.

To set a documented parameter or property to an undocumented or not yet supported value, pass a JsonValue object to its setter:

import com.scrapegraphai.api.core.JsonValue;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt(JsonValue.from(42))
    .build();

The most straightforward way to create a JsonValue is using its from(...) method:

import com.scrapegraphai.api.core.JsonValue;
import java.util.List;
import java.util.Map;

// Create primitive JSON values
JsonValue nullValue = JsonValue.from(null);
JsonValue booleanValue = JsonValue.from(true);
JsonValue numberValue = JsonValue.from(42);
JsonValue stringValue = JsonValue.from("Hello World!");

// Create a JSON array value equivalent to `["Hello", "World"]`
JsonValue arrayValue = JsonValue.from(List.of(
  "Hello", "World"
));

// Create a JSON object value equivalent to `{ "a": 1, "b": 2 }`
JsonValue objectValue = JsonValue.from(Map.of(
  "a", 1,
  "b", 2
));

// Create an arbitrarily nested JSON equivalent to:
// {
//   "a": [1, 2],
//   "b": [3, 4]
// }
JsonValue complexValue = JsonValue.from(Map.of(
  "a", List.of(
    1, 2
  ),
  "b", List.of(
    3, 4
  )
));

Normally a Builder class's build method will throw IllegalStateException if any required parameter or property is unset.

To forcibly omit a required parameter or property, pass JsonMissing:

import com.scrapegraphai.api.core.JsonMissing;
import com.scrapegraphai.api.models.smartscraper.SmartscraperCreateParams;

SmartscraperCreateParams params = SmartscraperCreateParams.builder()
    .userPrompt(JsonMissing.of())
    .build();

Response properties

To access undocumented response properties, call the _additionalProperties() method:

import com.scrapegraphai.api.core.JsonValue;
import java.util.Map;

Map<String, JsonValue> additionalProperties = client.smartscraper().create(params)._additionalProperties();
JsonValue secretPropertyValue = additionalProperties.get("secretProperty");

String result = secretPropertyValue.accept(new JsonValue.Visitor<>() {
    @Override
    public String visitNull() {
        return "It's null!";
    }

    @Override
    public String visitBoolean(boolean value) {
        return "It's a boolean!";
    }

    @Override
    public String visitNumber(Number value) {
        return "It's a number!";
    }

    // Other methods include `visitMissing`, `visitString`, `visitArray`, and `visitObject`
    // The default implementation of each unimplemented method delegates to `visitDefault`, which throws by default, but can also be overridden
});

To access a property's raw JSON value, which may be undocumented, call its _ prefixed method:

import com.scrapegraphai.api.core.JsonField;
import java.util.Optional;

JsonField<String> userPrompt = client.smartscraper().create(params)._userPrompt();

if (userPrompt.isMissing()) {
  // The property is absent from the JSON response
} else if (userPrompt.isNull()) {
  // The property was set to literal null
} else {
  // Check if value was provided as a string
  // Other methods include `asNumber()`, `asBoolean()`, etc.
  Optional<String> jsonString = userPrompt.asString();

  // Try to deserialize into a custom type
  MyClass myObject = userPrompt.asUnknown().orElseThrow().convert(MyClass.class);
}

Response validation

In rare cases, the API may return a response that doesn't match the expected type. For example, the SDK may expect a property to contain a String, but the API could return something else.

By default, the SDK will not throw an exception in this case. It will throw ScrapegraphaiInvalidDataException only if you directly access the property.

If you would prefer to check that the response is completely well-typed upfront, then either call validate():

import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;

CompletedSmartscraper completedSmartscraper = client.smartscraper().create(params).validate();

Or configure the method call to validate the response using the responseValidation method:

import com.scrapegraphai.api.models.smartscraper.CompletedSmartscraper;

CompletedSmartscraper completedSmartscraper = client.smartscraper().create(
  params, RequestOptions.builder().responseValidation(true).build()
);

Or configure the default for all method calls at the client level:

import com.scrapegraphai.api.client.ScrapegraphaiClient;
import com.scrapegraphai.api.client.okhttp.ScrapegraphaiOkHttpClient;

ScrapegraphaiClient client = ScrapegraphaiOkHttpClient.builder()
    .fromEnv()
    .responseValidation(true)
    .build();

FAQ

Why don't you use plain enum classes?

Java enum classes are not trivially forwards compatible. Using them in the SDK could cause runtime exceptions if the API is updated to respond with a new enum value.

Why do you represent fields using JsonField<T> instead of just plain T?

Using JsonField<T> enables a few features:

Why don't you use data classes?

It is not backwards compatible to add new fields to a data class and we don't want to introduce a breaking change every time we add a field to a class.

Why don't you use checked exceptions?

Checked exceptions are widely considered a mistake in the Java programming language. In fact, they were omitted from Kotlin for this reason.

Checked exceptions:

  • Are verbose to handle
  • Encourage error handling at the wrong level of abstraction, where nothing can be done about the error
  • Are tedious to propagate due to the function coloring problem
  • Don't play well with lambdas (also due to the function coloring problem)

Semantic versioning

This package generally follows SemVer conventions, though certain backwards-incompatible changes may be released as minor versions:

  1. Changes to library internals which are technically public but not intended or documented for external use. (Please open a GitHub issue to let us know if you are relying on such internals.)
  2. Changes that we do not expect to impact the vast majority of users in practice.

We take backwards-compatibility seriously and work hard to ensure you can rely on a smooth upgrade experience.

We are keen for your feedback; please open an issue with questions, bugs, or suggestions.

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