# Applications ### Send to First Input A simple contract that verifies a simple bitcoin transaction and sends the equivalent of stx to the first input of the transaction. ### BitBadge Mint an NFT with a Bitcoin transaction, used as part of the [Bitcoin Primer tutorial](https://bitcoinprimer.dev). --- # 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://clarity-bitcoin.gitbook.io/clarity-bitcoin-library/applications.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.