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How to complete the challenge GET /challenger/guid (existing X-CHALLENGER)

Use GET /challenger/{guid} to retrieve your current challenger progress as JSON.

The {guid} in the URL should match the active X-CHALLENGER value. The response body is the progress payload you can later send back to PUT /challenger/{guid}.

This is useful when you want to save your challenge progress outside the browser.

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GET /challenger/{guid} with X-CHALLENGER to get current progress