# External Nodes External nodes play a pivotal role in extending the functionality of workflows by providing direct integration with external services, APIs, and resources. These nodes empower users to seamlessly interact with external systems, thereby enhancing the scope and versatility of their applications. Some of the external nodes present in cosmocloud are - * **API Call :** This node allows you to easily connect with external APIs within your API flow, enabling smooth interactions and expanding the functionality of your workflow. * **Get Presigned URL** : This node allows user to generate a unique URL that provides temporary access to a specific resource hosted on a cosmocloud storage service. * **Post Presigned URL** : This node allows user to generate a presigned URL that is specifically generated for the purpose of allowing HTTP POST requests. * **Send EMAIL (SES) :** This node allows user to send emails to specified user using AWS SES Service. * **Send SMS (SNS):** This nodes allows user to send text messages or notifications to user using AWS SNS service. * **Fire Events (SQS) :** This node allows user to fire event to a external queue using AWS SQS service. --- # 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.cosmocloud.io/flow-builder/node-types/external-nodes.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.