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11151115<Note>
11161116 For detailed platform setup guides with code examples, see:
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1118 * [Amazon Bedrock](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock)
1119 * [Amazon Bedrock (Opus 4.6 and earlier)](https://platform.claude.com/docs/en/build-with-claude/claude-on-amazon-bedrock-legacy)
1118 * [Amazon Bedrock (`bedrock-mantle`)](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock)
1119 * [Amazon Bedrock (`bedrock-runtime`)](https://platform.claude.com/docs/en/build-with-claude/claude-on-amazon-bedrock-legacy)
11201120 * [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws)
11211121 * [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/google-managed)
11221122 * [Microsoft Foundry](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry)
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11271127The Java SDK supports the following platforms through separate dependencies that provide platform-specific `Backend` implementations:
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11291129* **Claude Models on Google Cloud (Google managed):** `com.anthropic:anthropic-java-vertex`: Use `VertexBackend.builder()` or `VertexBackend.fromEnv()`. `fromEnv()` reads `CLOUD_ML_REGION` and `ANTHROPIC_VERTEX_PROJECT_ID` and uses Application Default Credentials.
1130* **Bedrock:** `com.anthropic:anthropic-java-bedrock`: Use `BedrockMantleBackend.fromEnv()` or `BedrockMantleBackend.builder()` for the Messages-API Bedrock endpoint, or `BedrockBackend.fromEnv()` / `BedrockBackend.builder()` (`bedrock-runtime` path).
1130* **Bedrock:** `com.anthropic:anthropic-java-bedrock`: Use `BedrockMantleBackend.fromEnv()` or `BedrockMantleBackend.builder()` for the `bedrock-mantle` endpoint, or `BedrockBackend.fromEnv()` or `BedrockBackend.builder()` for the `InvokeModel` API on the `bedrock-runtime` endpoint.
11311131* **Claude Platform on AWS:** `com.anthropic:anthropic-java-aws`: Use `AwsBackend.fromEnv()` (reads `ANTHROPIC_AWS_WORKSPACE_ID` and the AWS default region/credential chain) or `AwsBackend.builder()`. Available in beta.
11321132* **Foundry:** `com.anthropic:anthropic-java-foundry`: Use `FoundryBackend.fromEnv()` or `FoundryBackend.builder()`.
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1134Use `BedrockMantleBackend` for new projects; `BedrockBackend` remains for existing applications using the Bedrock `InvokeModel` API.
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11361134The Java SDK also supports Claude Models on Google Cloud (Anthropic managed) through `GoogleCloudBackend`, from the `com.anthropic:anthropic-java-google-cloud` dependency. This backend is in beta. Create it with `GoogleCloudBackend.builder()` or `GoogleCloudBackend.fromEnv()`. `fromEnv()` reads `ANTHROPIC_GOOGLE_CLOUD_WORKSPACE_ID`, `ANTHROPIC_GOOGLE_CLOUD_PROJECT`, and Google Application Default Credentials. See [Project, location, and workspace resolution](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/anthropic-managed#project-location-and-workspace-resolution).
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11381136Install each platform artifact alongside the base `anthropic-java` dependency, as shown in [Add-ons](https://platform.claude.com/docs/en/cli-sdks-libraries/sdks/java#add-ons). Each `Backend` implementation is passed to the client with `.backend()` on `AnthropicOkHttpClient.builder()`.
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12141212### OpenTelemetry tracing
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1216When your application registers an OpenTelemetry tracer provider, the SDK emits a span for each request that it sends. To send the spans to your observability platform, see [Set up OpenTelemetry with the Claude SDK](https://platform.claude.com/docs/en/manage-claude/opentelemetry/sdk).
1214When your application registers an OpenTelemetry tracer provider, the SDK emits a span for each request that it sends. To send the spans to your observability platform, see [Set up OpenTelemetry with the Anthropic SDK](https://platform.claude.com/docs/en/manage-claude/opentelemetry/sdk).
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12181216### Undocumented API functionality
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