What are the Maven dependency parameters for the Java Gradle API?

I found this artifact after a longer search: https://mvnrepository.com/artifact/org.gradle/gradle-core/2.2.1

<dependency>
  <groupId>org.gradle</groupId>
  <artifactId>gradle-core</artifactId>
  <version>2.2.1</version>
</dependency>

The artifact is available in following repository: http://repo.springsource.org/libs-release-remote/

<repository>
  <id>Spring Source Libs</id>
  <url>http://repo.springsource.org/libs-release-remote/</url>
</repository>

Add the repository to the repositories section in your pom.xml as well as the artifact as dependency. I tested it with a Maven project in my Eclipse workspace - the org.gradle.api.* classes are available and I can also browse the gradle-core sources.

If you want to use the official Gradle Releases repository in a Maven pom try this:

<dependencies>
    <dependency>
        <groupId>org.gradle</groupId>
        <artifactId>gradle-core</artifactId>
        <version>3.4.1</version>
    </dependency>
    <dependency>
        <groupId>org.gradle</groupId>
        <artifactId>gradle-tooling-api</artifactId>
        <version>3.4.1</version>
    </dependency>
    <dependency>
        <groupId>org.gradle</groupId>
        <artifactId>gradle-base-services</artifactId>
        <version>3.4.1</version>
    </dependency>
    <dependency>
        <groupId>org.gradle</groupId>
        <artifactId>gradle-base-services-groovy</artifactId>
        <version>3.4.1</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.groovy</groupId>
        <artifactId>groovy-all</artifactId>
        <version>2.4.10</version>
    </dependency>
</dependencies>

<repositories>
    <repository>
        <id>repo.gradle.org</id>
        <url>https://repo.gradle.org/gradle/libs-releases-local/</url>
    </repository>
</repositories>