Automatically handles tool execution loop changedcli-sdks-libraries/sdks/ruby
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44description: Install and configure the Anthropic Ruby SDK with Sorbet types, streaming helpers, and connection pooling
55---
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7The Anthropic Ruby library provides convenient access to the Claude API from any Ruby 3.2.0+ application. It ships with comprehensive types and docstrings in YARD, RBS, and RBI. The standard library's `net/http` is used as the HTTP transport, with connection pooling through the `connection_pool` gem.
7The Anthropic Ruby library provides convenient access to the Claude API from any Ruby 3.2.0+ application. It ships with comprehensive types and docstrings in YARD, RBS, and RBI. The standard library’s `net/http` is used as the HTTP transport, with connection pooling through the `connection_pool` gem.
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99<Info>
1010 For API feature documentation with code examples, see the [API reference](https://platform.claude.com/docs/en/api/overview). This page covers Ruby-specific SDK features and configuration.
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1212
1313## Installation
1414
15Add the gem to your application's `Gemfile` with Bundler:
15Add the gem to your application’s `Gemfile` with Bundler:
1616
1717```bash
1818bundle add anthropic
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4040end
4141```
4242
43For authentication options including Workload Identity Federation, see [Authentication](https://platform.claude.com/docs/en/manage-claude/authentication). If your API key is a [personal or service account key](https://platform.claude.com/docs/en/manage-claude/authentication#key-types) that isn't scoped to a workspace, set the workspace ID in the `anthropic-workspace-id` request header; [Select a workspace](https://platform.claude.com/docs/en/manage-claude/authentication#select-a-workspace) shows the per-request option for this SDK.
43For authentication options including Workload Identity Federation, see [Authentication](https://platform.claude.com/docs/en/manage-claude/authentication). If your API key is a [personal or service account key](https://platform.claude.com/docs/en/manage-claude/authentication#key-types) that isn’t scoped to a workspace, set the workspace ID in the `anthropic-workspace-id` request header; [Select a workspace](https://platform.claude.com/docs/en/manage-claude/authentication#select-a-workspace) shows the per-request option for this SDK.
4444
4545## Streaming
4646
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249249puts(file_metadata.id)
250250```
251251
252Note that you can also pass a raw `IO` descriptor, but this disables retries, as the library can't determine whether the descriptor is a file or pipe (which cannot be rewound).
252Note that you can also pass a raw `IO` descriptor, but this disables retries, as the library can’t determine whether the descriptor is a file or pipe (which cannot be rewound).
253253
254254## Sorbet
255255
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288288
289289### Enums
290290
291Because this library does not depend on `sorbet-runtime`, it cannot provide [`T::Enum`](https://sorbet.org/docs/tenum) instances. Instead, the SDK provides "tagged symbols," which are always primitives at runtime:
291Because this library does not depend on `sorbet-runtime`, it cannot provide [`T::Enum`](https://sorbet.org/docs/tenum) instances. Instead, the SDK provides “tagged symbols,” which are always primitives at runtime:
292292
293293```ruby
294294# :auto
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298298T.reveal_type(Anthropic::MessageCreateParams::ServiceTier::AUTO)
299299```
300300
301Enum parameters have a "relaxed" type, so you can either pass in enum constants or their literal value:
301Enum parameters have a “relaxed” type, so you can either pass in enum constants or their literal value:
302302
303303```ruby
304304anthropic = Anthropic::Client.new
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