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HomeDocsClaude Developer Platform 30 Sep 2026
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gcp changedmanage-claude/wif-providers/gcp

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127127## Acquire and use the token
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129Inside your Google Cloud workload, fetch the identity token from the metadata server, exchange it at `POST /v1/oauth/token`, and use the returned bearer token to call the Claude API. Each Anthropic SDK handles the exchange and refresh loop for you when you pass a callable that returns a fresh identity token from the metadata server to `identity_token_provider` (typescript, php: `identityTokenProvider`; csharp: `IdentityTokenProvider`; go: `option.WithFederationTokenProvider`; java: `federationTokenProvider`), as shown in the following examples.
129Inside your Google Cloud workload, fetch the identity token from the metadata server, exchange it at `POST /v1/oauth/token`, and use the returned bearer token to call the Claude API. The Claude SDK handles the exchange and refresh loop for you when you pass a callable that returns a fresh identity token from the metadata server to `identity_token_provider` (typescript, php: `identityTokenProvider`; csharp: `IdentityTokenProvider`; go: `option.WithFederationTokenProvider`; java: `federationTokenProvider`), as shown in the following examples.
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131131<CodeGroup>
132132 ```bash cURL
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420420 ```
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423Google identity tokens expire after roughly one hour. The SDKs re-invoke the token provider and re-exchange automatically before expiry. For shell scripts that run longer than the access token's `expires_in`, refresh on a timer and repeat the exchange.
423Google identity tokens expire after roughly one hour. The SDK re-invokes the token provider and re-exchanges automatically before expiry. For shell scripts that run longer than the access token's `expires_in`, refresh on a timer and repeat the exchange.
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425425## Verify the setup
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