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170170### OpenTelemetry tracing
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172When 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).
172When 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).
173173 
174174### Undocumented properties
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255255<Note>
256256 For detailed platform setup guides with code examples, see:
257257 
258 * [Amazon Bedrock](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock)
259 * [Amazon Bedrock (Opus 4.6 and earlier)](https://platform.claude.com/docs/en/build-with-claude/claude-on-amazon-bedrock-legacy)
258 * [Amazon Bedrock (`bedrock-mantle`)](https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock)
259 * [Amazon Bedrock (`bedrock-runtime`)](https://platform.claude.com/docs/en/build-with-claude/claude-on-amazon-bedrock-legacy)
260260 * [Claude Platform on AWS](https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws)
261261 * [Claude Models on Google Cloud (Google managed)](https://platform.claude.com/docs/en/build-with-claude/claude-models-on-google-cloud/google-managed)
262262 * [Microsoft Foundry](https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry)
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267267The PHP SDK supports the following platforms:
268268 
269269* **Claude Models on Google Cloud (Google managed):** `Anthropic\Vertex\Client`. Use `::fromEnvironment()`.
270* **Bedrock:** `Anthropic\Bedrock\MantleClient`. Use `new MantleClient(awsRegion: ...)`.
271* **Bedrock (legacy):** `Anthropic\Bedrock\Client`. Use `::fromEnvironment()` or `::withCredentials()`.
270* **Amazon Bedrock (`bedrock-mantle`):** `Anthropic\Bedrock\MantleClient`. Use `new MantleClient(awsRegion: ...)`.
271* **Amazon Bedrock (`bedrock-runtime`):** `Anthropic\Bedrock\Client`, for the `InvokeModel` API. Use `::fromEnvironment()` or `::withCredentials()`.
272272* **Claude Platform on AWS:** `Anthropic\Aws\Client` (requires `aws/aws-sdk-php` as a soft dependency). Use `new Anthropic\Aws\Client(workspaceId: ...)` or set `ANTHROPIC_AWS_WORKSPACE_ID`. Available in beta.
273273* **Foundry:** `Anthropic\Foundry\Client`. Use `::withCredentials()`.
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275Use `MantleClient` for new projects; `Anthropic\Bedrock\Client` remains for existing applications using the Bedrock `InvokeModel` API.
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277275The PHP SDK also supports Claude Models on Google Cloud (Anthropic managed) through `Anthropic\GoogleCloud\Client`. This client is in beta. `Anthropic\GoogleCloud\Client` requires `google/auth` as a soft dependency. Use `new Anthropic\GoogleCloud\Client(workspaceId: ...)` or set the `ANTHROPIC_GOOGLE_CLOUD_WORKSPACE_ID` environment variable. 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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