# API Connector API Connector is a plugin made by Bubble allowing you to connect to any 3rd party API giving you access to tens of thousands external solutions. Read more about the basics of using API connector in [Bubble manual](https://manual.bubble.io/core-resources/bubble-made-plugins/api-connector). When it comes to the template, by default, you find pre-built API calls such as: * Sendgrid - Send Email - basic POST call for sending emails with Sendgrid. It also works with attachments. Learn how to work email work with openBuild template[ in this section](/working-with-the-framework/transactional-email.md). (See Sendgrid documentation [here](https://docs.sendgrid.com/api-reference/mail-send/mail-send)) * Postmark - see documentation [here](https://postmarkapp.com/developer/user-guide/send-email-with-api). * Send Email * Send Email (with Attachment) Check our extensive API calls library in openBuild. --- # 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.openbuild.io/framework-elements/api-connector.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.