Kotlin API clients

The Kotlin API clients let you interact with Algolia’s APIs from your Java backend.

Install the library

All API clients are part of the algoliasearch-client-kotlin package.

If you use Gradle, add the following to your build.gradle file:

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dependencies {
implementation 'com.algolia:algoliasearch-client-kotlin:3.5.0'
  // You need to specify an engine for Ktor
  runtimeOnly 'io.ktor:ktor-client-java:2.3.11'
}

For more information about available engines for Ktor, see Engines.

Alternatively, you can import the BOM package:

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dependencies {
    implementation platform("com.algolia:algoliasearch-client-kotlin-bom:3.5.0}")

    // define dependencies without versions
    implementation 'com.algolia:algoliasearch-client-kotlin'
    runtimeOnly 'io.ktor:ktor-client-java'
}

For serializing Kotlin data objects to JSON, add the serialization plugin to your build.gradle file:

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plugins {
    id 'org.jetbrains.kotlin.plugin.serialization' version '2.0.0'
}

Test your installation

To test your installation, create a new Kotlin project in your favorite IDE and run a short program that adds a record to a test index, searches your index, and prints the results.

1. If you haven’t already, create an Algolia account.

2. Copy the following code into your IDE. Replace ALGOLIA_APPLICATION_ID and ALGOLIA_API_KEY with values from your account. Make sure to use an API key with addObject and search permissions.

   Kotlin

   Copy

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   package org.example
   
   import io.github.cdimascio.dotenv.Dotenv
   import com.algolia.client.api.SearchClient
   import com.algolia.client.extensions.waitTask
   import com.algolia.client.model.search.*
   import kotlinx.serialization.json.*
   
   suspend fun main() {
       val appID = "ALGOLIA_APPLICATION_ID"
       // API key with `addObject` and `search` ACL
       val apiKey = "ALGOLIA_API_KEY"
       val indexName = "ALGOLIA_INDEX_NAME"
   
       val client = SearchClient(appID, apiKey)
   
       // Create record (with autogenerated `objectID`)
       val record = buildJsonObject {
           put("objectID", "object-1")
           put("name", "test record")
       }
   
       // Add record to an index
       val addResponse = client.saveObject(indexName, record)
   
       // Wait until indexing is done
       client.waitTask(indexName, addResponse.taskID)
   
       // Search for 'test'
       val response = client.search(
           SearchMethodParams(requests =
               listOf(
                   SearchForHits(
                       indexName,
                       query = "test"
                   )
               )
           )
       )
   
       println(response)
   }
   

   In production, don’t include your credentials in your code. Use environment variables instead.

3. Run the program.

If the program completed successfully, you’ll see the API response.

Next steps

You can view your new index in the Algolia dashboard.