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 supply a token-provider callable that returns a fresh identity token from the metadata server, 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. 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.
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132132 ```bash cURL
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