Run Claude Code programmatically changedheadless
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186186#### Handle API retries
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188When an API request fails with a retryable error, Claude Code emits a `system/api_retry` event before retrying. You can use this to surface retry progress or implement custom backoff logic.
188When an API request fails with a retryable error, Claude Code emits a `system/api_retry` event before retrying. On v2.1.246 or later, when a `401` or `403` rejects an [`apiKeyHelper`](/docs/en/settings-reference#apikeyhelper) credential, Claude Code makes the first two retries quietly with no event, then emits the event as usual from the third consecutive retry onward. The quiet retries still count toward `attempt`. You can use the event to show retry progress in your own interface.
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