# Metadata Some updatable objects might have a metadata parameter. You can use this parameter to attach key-value data to these objects You can specify up to 50 keys, with key names up to 50 utf-8 characters long and values up to 500 utf-8 characters long. Metadata is useful for storing additional, structured information on an object. As an example, you could store your corresponding unique identifier from your system as metadata for the object. Do not store any sensitive information as metadata. --- # 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://developer.convergegate.com/legacy/wallet-api/introduction/metadata.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.