Implementation:Anthropics Anthropic sdk python Provider Dependency Install

Knowledge Sources	Anthropic Python SDK Anthropic API Docs
Domains	Cloud_Deployment, LLM, Infrastructure
Last Updated	2026-02-15 00:00 GMT

Overview

This page documents the installation commands and optional dependency declarations that enable cloud provider support in the Anthropic Python SDK. The SDK uses Python package extras defined in pyproject.toml to manage provider-specific dependencies.

Type: External Tool Doc

Source: pyproject.toml:L41-44

Installation Commands

AWS Bedrock

pip install anthropic[bedrock]

This installs the core anthropic package plus the Bedrock-specific dependencies:

boto3 >= 1.28.57 -- AWS SDK for Python, used to create sessions and resolve credentials.
botocore >= 1.31.57 -- Low-level AWS library providing SigV4Auth for request signing and EventStreamBuffer for streaming response decoding.

Google Cloud Vertex AI

pip install anthropic[vertex]

This installs the core anthropic package plus the Vertex-specific dependency:

google-auth[requests] >= 2, < 3 -- Google authentication library with the requests transport extra for refreshing OAuth2 credentials via HTTP.

Azure AI Foundry

pip install anthropic

No extra dependencies are required. The Foundry client uses the core SDK's httpx transport and authenticates via API keys or user-supplied Azure AD token provider callables. No Azure-specific libraries are needed.

Multiple Providers

To support multiple providers in the same environment:

pip install anthropic[bedrock,vertex]

pyproject.toml Declaration

The optional dependencies are declared in pyproject.toml under [project.optional-dependencies]:

[project.optional-dependencies]
vertex = ["google-auth[requests] >=2, <3"]
bedrock = ["boto3 >= 1.28.57", "botocore >= 1.31.57"]

The core dependencies (always installed) are:

[project]
dependencies = [
    "httpx>=0.25.0, <1",
    "pydantic>=1.9.0, <3",
    "typing-extensions>=4.10, <5",
    "anyio>=3.5.0, <5",
    "distro>=1.7.0, <2",
    "sniffio",
    "jiter>=0.4.0, <1",
    "docstring-parser>=0.15,<1",
]

Dependency Version Constraints

Extra	Package	Version Constraint	Purpose
`[bedrock]`	`boto3`	`>= 1.28.57`	AWS session creation and credential resolution
`[bedrock]`	`botocore`	`>= 1.31.57`	SigV4 request signing and EventStream decoding
`[vertex]`	`google-auth[requests]`	`>= 2, < 3`	Google OAuth2 credentials and token refresh
(none)	`httpx`	`>= 0.25.0, < 1`	HTTP transport (used by all providers including Foundry)

The version lower bounds ensure that the SDK has access to the specific APIs it depends on (e.g., SigV4Auth, EventStreamBuffer, google.auth.default()). The upper bounds on google-auth prevent breaking changes from major version upgrades.

Runtime Validation

If the required extras are not installed, the SDK raises clear errors at import or initialization time:

Bedrock: Attempting to use AnthropicBedrock without boto3 raises ModuleNotFoundError when _prepare_request() tries to import botocore.auth.SigV4Auth.
Vertex: The load_auth() function catches ModuleNotFoundError and re-raises with the message: "Could not import google.auth, you need to install the SDK with pip install anthropic[vertex]".
Foundry: No runtime validation is needed since there are no extra dependencies.

Related Pages

Implements Principle

Principle:Anthropics_Anthropic_sdk_python_Provider_Selection_And_Dependencies

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