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claude-code-system-prompts/system-prompts/data-claude-platform-on-aws-reference.md
Mike 58f08bab7c v2.1.145 (+20,218 tokens)
2026-05-20 09:45:59 -06:00

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Claude Platform on AWS

Anthropic-operated access to the Claude Developer Platform through AWS infrastructure — SigV4 authentication, AWS IAM access control, and AWS Marketplace billing. Because Anthropic operates it, the API surface matches first-party with same-day parity: Managed Agents, server-side tools, batches, Files, and every feature in this skill work the same way (except self-hosted sandboxes — config:{type:"self_hosted"} is not available here; use cloud). Model IDs are the bare first-party strings ({{OPUS_ID}}, {{SONNET_ID}}) — no provider prefix.

Not the same as Amazon Bedrock. Bedrock is partner-operated (AWS runs the service; release schedules vary, feature subset, anthropic.-prefixed model IDs). Claude Platform on AWS and Bedrock coexist; pick by whether you need AWS-native IAM/billing with full Anthropic API parity (this page) vs. Bedrock's own ecosystem.

Client & install

Language Install Client
Python pip install -U "anthropic[aws]" from anthropic import AnthropicAWS → AnthropicAWS()
TypeScript npm install @anthropic-ai/aws-sdk import AnthropicAws from "@anthropic-ai/aws-sdk" → new AnthropicAws()
Go go get github.com/anthropics/anthropic-sdk-go import anthropicaws "github.com/anthropics/anthropic-sdk-go/aws" → anthropicaws.NewClient(ctx, anthropicaws.ClientConfig{})
C# dotnet add package Anthropic.Aws new AnthropicAwsClient()
Java See SDK repo in shared/live-sources.md See SDK repo in shared/live-sources.md
Ruby gem install anthropic aws-sdk-core See SDK repo in shared/live-sources.md
PHP composer require anthropic-ai/sdk aws/aws-sdk-php See SDK repo in shared/live-sources.md

After construction, use the client exactly as you would Anthropic() — client.messages.create(...), client.beta.sessions.*, etc., with bare model IDs.

from anthropic import AnthropicAWS

client = AnthropicAWS()  # region + workspace_id from env; see below
client.messages.create(
    model="{{OPUS_ID}}",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)

Required configuration

Two values must be available (constructor args or environment) — there is no default fallback for either:

Value Env var Notes
AWS region AWS_REGION Required. Unlike AnthropicBedrock, there is no us-east-1 fallback.
Workspace ID ANTHROPIC_AWS_WORKSPACE_ID Required. Routes requests to your Claude workspace.

Endpoint pattern: https://aws-external-anthropic.{region}.api.aws/v1/.... Requests are SigV4-signed with service name aws-external-anthropic.

Authentication

The client resolves AWS credentials via the standard precedence chain: explicit constructor args → environment (AWS_ACCESS_KEY_ID/AWS_SECRET_ACCESS_KEY/AWS_SESSION_TOKEN) → shared profile → assumed role / instance metadata.

Short-term API keys are also supported for cases where SigV4 isn't practical (e.g., browser, simple scripts). Mint one with the per-language token-generator package; pass it as api_key on the client. Lifetime is the lesser of the requested duration, the underlying credential's expiry, and 12 hours. For package names and IAM details, WebFetch the Claude Platform on AWS page in shared/live-sources.md.

What to tell users

  • Treat it as first-party: every section of this skill applies unchanged. Do not apply Bedrock's feature-availability mask.
  • Model IDs are bare ({{OPUS_ID}}). Do not add an anthropic. prefix.
  • A missing region or workspace_id throws at client-construction time (no request is sent). A 403 means the request reached the server — check for a wrong workspace_id or a missing IAM action on the principal. See the IAM actions reference in shared/live-sources.md.