> For the complete documentation index, see [llms.txt](https://docs.corppass.gov.sg/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.corppass.gov.sg/what-you-need-to-know-before-onboarding-a-digital-service-in-corppass/important-things-to-note/callback-urls.md). # Callback URLs ### **Can I configure multiple Callback URLs?** Yes, you can configure multiple Callback URLs for a single digital service. The `redirect_uri` in the authentication request must match one of the registered Callback URLs **exactly**, including the protocol (`https://`). *** ### **What happens if my Callback URL is incorrectly configured?** If the `redirect_uri` parameter in your request does not exactly match one of the registered Callback URLs, Corppass will reject the request with an **invalid\_request** error. Always ensure that the Callback URL is accurate and properly registered in both staging and production environments. *** ### **Can I use a wildcard in the Callback URL?** No, wildcard characters (e.g., `*`) are not allowed in the Callback URL. Each Callback URL must be explicitly defined in the service configuration. *** ### **Can I update the Callback URL after onboarding?** Yes, updates to Callback URLs is allowed. However, all changes should be tested in the staging environment before applying them to production. *** ### **Are there any keyword restrictions for Callback or JWKS URLs?** Yes, both Callback and JWKS URLs cannot contain the words 'singpass', 'corppass', or 'myinfo' as part of efforts to combat scams. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.corppass.gov.sg/what-you-need-to-know-before-onboarding-a-digital-service-in-corppass/important-things-to-note/callback-urls.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.