# Custom Metadata ### Custom data fields in your payment objects You may want to include some extra data fields in to the payment objects on our Platform. One example would be, customer-id. For your convenience you can associate theses extra fields that are related to specific payments. --- # Agent Instructions: 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.phenixio.com/for-developers/metadata-support.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.