How to Call API in Power Automate

Are you struggling to automate your workflows and tasks? Look no further, as this article will guide you on how to easily call API in Power Automate. With API integration, you can streamline your processes and improve efficiency. Say goodbye to manual tasks and hello to seamless automation.

What Is Power Automate?

Power Automate is a cloud-based service that enables users to easily create and automate workflows across multiple applications and services. This innovative platform allows for seamless integration between various systems, simplifying tasks and boosting productivity.

With Power Automate, users can automate repetitive tasks, such as data synchronization, notifications, and approvals, without the need for any coding. The platform offers a vast selection of pre-built connectors and templates, making it effortless to connect to different applications and services.

Overall, Power Automate offers a user-friendly and efficient solution for automating workflows and streamlining business processes.

What Is an API?

API stands for Application Programming Interface. It is a set of rules and protocols that allow different software applications to communicate and interact with each other. APIs define the methods and data formats that developers can utilize to access the features or services of a specific application, platform, or operating system. They play a crucial role in enabling seamless integration and data exchange between different systems, empowering developers to create new applications or enhance existing ones.

APIs are widely utilized in various industries, including web development, mobile app development, and cloud computing.

Fun fact: APIs are essential for facilitating the integration of different software systems, making it easier for developers to innovate and create solutions.

What Is the Purpose of an API?

The purpose of an API (Application Programming Interface) is to enable communication and interaction between different software systems. It allows applications to access and utilize the functionalities and data of another application or service. APIs serve as intermediaries, facilitating the exchange of information and actions between different software components. Through APIs, developers can integrate third-party services, retrieve data from external sources, and perform various operations without having to build everything from scratch. This promotes efficiency, scalability, and collaboration among different software systems, making it easier to develop innovative applications and provide seamless user experiences.

How to Find and Choose an API?

When searching for an API to use in your Power Automate workflow, there are several steps you should follow:

  1. Identify your requirements: Determine the specific functionalities or data that you need from the API.
  2. Research available APIs: Look for APIs that meet your requirements and have a good reputation for reliability and thorough documentation.
  3. Check documentation: Review the API’s documentation to understand its endpoints, parameters, and methods of authentication.
  4. Consider data formats: Make sure that the API supports the necessary data formats, such as JSON or XML.
  5. Check usage limits and pricing: Evaluate whether the API’s usage limits and pricing structure are suitable for your needs and budget.
  6. Test integration: Before making a final decision, test the API integration in a sandbox or development environment.

By following these steps, you can effectively find and select an API that meets your Power Automate requirements.

What Are the Different Types of APIs?

There are various types of APIs that serve different purposes, including:

  1. Web APIs: These APIs facilitate communication between different web applications over the internet, allowing for data sharing and functionality integration.
  2. REST APIs: Representational State Transfer (REST) APIs use standard HTTP methods such as GET, POST, PUT, and DELETE to access and manipulate resources. They are commonly used in web development.
  3. SOAP APIs: Simple Object Access Protocol (SOAP) APIs use XML-based messages to exchange data between applications. They are known for their robustness and security features.
  4. GraphQL APIs: GraphQL APIs enable clients to request only the specific data they need, resulting in reduced data transfer and improved performance.

Fun Fact: Did you know that there are currently over 50,000 public APIs available, covering a wide range of industries and functionalities?

What Are the Key Factors to Consider When Choosing an API?

When selecting an API, it is crucial to take into account several key factors to guarantee compatibility and effectiveness. These factors include:

  1. Documentation: Opt for an API with comprehensive and easy-to-understand documentation, complete with examples and guides.
  2. Functionality: Evaluate the features and capabilities of the API to ensure it meets your specific requirements.
  3. Reliability: Look for an API with a reliable uptime and minimal downtime to avoid any interruptions.
  4. Security: Give preference to APIs that offer secure authentication and data encryption to safeguard sensitive information.
  5. Support and community: Consider APIs that provide efficient and helpful customer support and have an active community for troubleshooting.

By considering these factors, you can choose an API that best suits your needs and supports your development goals.

How to Call an API in Power Automate?

In this section, we will discuss the steps to successfully call an API in Power Automate. With the power of automation, integrating APIs into your workflows can greatly streamline your tasks. First, we will go over how to obtain an API key, which is necessary for authentication purposes. Then, we will dive into the process of creating an HTTP request to send to the API. Finally, we will cover how to parse the response from the API and use the data within your workflow. Let’s get started!

Step 1: Obtain an API Key

To obtain an API key in Power Automate, follow these steps:

  1. Sign in to the API provider’s website or platform.
  2. Create an account or log in if you already have one.
  3. Go to your account settings or developer dashboard.
  4. Look for the section related to API keys or authentication.
  5. Click on “Generate new key” or a similar option.
  6. Specify any required details, such as a name or description for the key.
  7. Generate the key and copy it to your clipboard.

Once you have obtained the API key, you can use it in Power Automate to authenticate and access the API resources you need.

Step 2: Create an HTTP Request

To create an HTTP request in Power Automate, follow these steps:

  1. Open Power Automate and choose your flow or create a new one.
  2. Add an action to your flow and search for the “HTTP” connector.
  3. Select the “HTTP” connector and choose the “HTTP – HTTP” action.
  4. Configure the action by providing the necessary details such as the HTTP method (GET, POST, etc.), the URL of the API endpoint, and any required headers or parameters.
  5. You can also pass dynamic data from previous steps or use expressions to customize the request.
  6. Save and test your flow to ensure the HTTP request is being sent correctly.


  • Double-check the API documentation for any specific requirements or limitations.
  • Consider error handling and response parsing in case the API returns unexpected results.
  • Use the “HTTP with Azure AD” connector for secure authentication and authorization.
  • Explore advanced options like OAuth 2.0 or API key authentication for enhanced security.

Step 3: Parse the Response

To efficiently parse the response when calling an API in Power Automate, follow these steps:

  1. Access the response body by using the appropriate action or expression in Power Automate.
  2. Extract the desired data from the response body by utilizing JSON parsing functions or expressions.
  3. Assign the extracted data to variables or use it in subsequent actions within your workflow.
  4. Handle any errors or exceptions that may arise during the parsing process to ensure smooth execution of your workflow.

In the early days of computing, parsing responses was a time-consuming and error-prone task. Programmers had to manually analyze and extract data from raw text files. However, with advancements in technology and the development of powerful parsing libraries, the process has become much simpler and more efficient. Today, parsing responses is a crucial aspect of API integration, enabling seamless data extraction and utilization in various applications and workflows.

What Are the Best Practices for Calling APIs in Power Automate?

When it comes to calling APIs in Power Automate, there are several best practices that can help ensure a smooth and efficient process. In this section, we will discuss the top methods for calling APIs in Power Automate and the advantages of each approach. From utilizing the “HTTP with Azure AD” Connector to incorporating OAuth 2.0 and API Key Authentication, we’ll cover the most effective techniques for integrating APIs into your automated workflows in Power Automate.

1. Use the “HTTP with Azure AD” Connector

To utilize the “HTTP with Azure AD” Connector in Power Automate, follow these steps:

  1. Log in to Power Automate and create a new flow.
  2. Add the “HTTP with Azure AD” Connector to your flow.
  3. Configure the Connector by entering the required details, such as the API URL and authentication method.
  4. Utilize the available actions and triggers to define the desired functionality for your flow.
  5. Test the flow to ensure it is functioning as expected.
  6. Save and publish the flow to make it accessible for use.

By utilizing the “HTTP with Azure AD” Connector, you can easily integrate APIs into your Power Automate workflows, enabling you to automate various tasks and processes efficiently.

2. Use the “HTTP with Azure AD” Connector with OAuth 2.0

To utilize the “HTTP with Azure AD” connector with OAuth 2.0 in Power Automate, simply follow these steps:

  1. Obtain the necessary credentials, including the client ID and client secret, from your Azure AD application.
  2. Create a new flow in Power Automate and add the “HTTP with Azure AD” connector to the flow.
  3. Configure the connector by providing the required information, such as the token endpoint URL and the resource URL.
  4. Select the “OAuth 2.0” option in the authentication method dropdown to set up OAuth 2.0 authentication.
  5. Enter the client ID and client secret obtained earlier into the respective fields.
  6. Customize any additional settings, such as scopes and redirect URLs, based on your specific requirements.
  7. Save the connector configuration and use it within your flow to make authenticated API calls using OAuth 2.0.

3. Use the “HTTP with Azure AD” Connector with API Key Authentication

To utilize the “HTTP with Azure AD” Connector with API Key Authentication in Power Automate, simply follow these steps:

  1. Acquire an API key from the desired service provider.
  2. Create a new flow in Power Automate and add the “HTTP with Azure AD” Connector.
  3. In the Connector settings, select the “API Key” authentication method.
  4. Enter the API key into the designated field.
  5. Configure the rest of the flow according to your specific requirements, such as adding triggers, actions, or conditions.
  6. Test the flow to ensure it is functioning correctly.
  7. Save and activate the flow to begin using it.

Using the “HTTP with Azure AD” Connector with API Key Authentication offers a secure and dependable method for connecting and authenticating with APIs in Power Automate. Be sure to follow any additional guidelines or requirements provided by the API service provider for successful integration.

What Are Some Common Errors When Calling APIs in Power Automate?

As more organizations integrate APIs into their workflows, it’s important to understand the potential challenges that can arise when calling APIs in Power Automate. In this section, we will discuss some common errors that may occur when using APIs in Power Automate and how to troubleshoot them. From invalid credentials to incorrectly formatted requests to server errors, we’ll cover the most common obstacles that may prevent successful API calls in Power Automate.

1. Invalid Credentials

When utilizing APIs in Power Automate, encountering the “Invalid Credentials” error is a common occurrence. To troubleshoot and resolve this issue, follow these steps:

  1. Verify the accuracy of the entered credentials, such as API keys or authentication tokens.
  2. Ensure that the credentials are properly formatted and meet the requirements specified by the API provider.
  3. Check for any expiration of the credentials and refresh or regenerate them if needed.
  4. Confirm that the API endpoint URL is correct and corresponds to the credentials being used.

To avoid encountering “Invalid Credentials” errors, it is recommended to:

  • Regularly review and update credentials to prevent expiration.
  • Double-check the API provider’s documentation for any specific requirements or changes.
  • Implement proper error handling and logging mechanisms to quickly identify and resolve any authentication issues.

2. Incorrectly Formatted Request

When calling APIs in Power Automate, it’s important to ensure that your request is correctly formatted to avoid errors. Here are steps to follow to ensure a correctly formatted request:

  1. Understand the API documentation: Familiarize yourself with the API’s documentation to understand the required parameters and their formats.
  2. Construct the request: Use the provided endpoint and method (GET, POST, etc.) to structure your request.
  3. Add headers: Include any necessary headers, such as authentication tokens or content types.
  4. Set the request body: If required, provide the necessary data in the request body, ensuring it matches the expected format.
  5. Validate the request: Double-check the formatting of your request before sending it to ensure it matches the API’s requirements.

By following these steps, you can ensure your request is correctly formatted and increase the chances of a successful API call. Additionally, it is important to avoid an incorrect request format by carefully following the API’s documentation and validating your request before sending it.

3. Server Errors

Server errors can occur when calling APIs in Power Automate. Here are some common server error scenarios and how to address them:

  1. Invalid URL: Check that the API endpoint is correct and accessible.
  2. Timeout: Increase the timeout duration or optimize the API call to reduce response time.
  3. Rate Limit Exceeded: Avoid making too many requests in a short period. Implement rate limiting strategies or contact the API provider for higher rate limits.

Pro-tip: Always review the API documentation and error responses to troubleshoot server errors effectively.

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