# HASHTAG REGISTERY **What is hashtag registry?** Hashtag registry is the primary service operated by the TAG Protocol. Its is responsible for collecting payments and issuing unique Hashtag NFT Tokens to the users. **How does registry work?** When the user register's a new hashtag with a specific value (e.g. "tesla, fashion, love") the registry mints a new NFT token with the value provided by the user and send that token to users wallet address. **Can someone buy a hashtag that is already registered?** Hashtag value once assigned will not be re-issued by the registry. All hashtags NFT must have a unique value. **Does registry make distinction between upper caps & lower Caps alphabets?** Yes, the registry makes a distinction between upper & lower cap alphabets. For example the word **bitcoin , Bitcoin, BITCOIN** will be treated as unique values by the registry. Please be careful about this rule while registering your hashtags. The performance data will be tracked based upon exact match of the word and not the meaning or context of a given word assigned to a hashtag. --- # 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://tagprotocol.gitbook.io/tagprotocol/features/step1-hashtag-registry.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.