Can We Call Web API From SQL Server Stored Procedure?


Scott Campbell

Can We Call Web API From SQL Server Stored Procedure?

SQL Server stored procedures are powerful tools that allow developers to execute complex logic and perform various operations within the database. However, there may be scenarios where you need to interact with external services or APIs from within a stored procedure. In this tutorial, we will explore whether it is possible to call a web API directly from a SQL Server stored procedure.

Why Call a Web API from a Stored Procedure?

Before diving into the technical details, let’s first understand why you might want to call a web API from a stored procedure. Here are some common scenarios:

  • Data Synchronization: You may need to synchronize data between your database and an external system or service.
  • Data Enrichment: You might want to enrich your data by retrieving additional information from an external source.
  • Business Logic: Your application’s business rules may require interaction with specific APIs for validation or processing.


Calling a web API directly from a stored procedure can be challenging due to the following reasons:

  • No Native HTTP Support: SQL Server does not provide built-in functions or methods for making HTTP requests.
  • Limited External Access: By default, SQL Server has limited network access, and calling external services may be restricted by firewall rules or security policies.

Possible Solutions

To overcome these challenges, we can implement one of the following solutions:

Solution 1: Use CLR Integration

If you have control over the SQL Server instance and have sufficient permissions, you can enable CLR integration. CLR (Common Language Runtime) allows you to write and execute managed code within SQL Server, including making HTTP requests. By creating a custom CLR assembly, you can call a web API from a stored procedure using .NET libraries like HttpClient.

Solution 2: Use External Components

If enabling CLR integration is not feasible or restricted in your environment, you can use external components or extensions that provide HTTP capabilities to SQL Server. These components usually come with their own set of functions or stored procedures that allow you to make HTTP requests directly from T-SQL code.

Solution 3: Use an Intermediate Application

If calling a web API directly from a stored procedure is not possible due to technical limitations or security constraints, you can consider an alternative approach. You can build an intermediate application or service that acts as a bridge between your database and the web API. The stored procedure can then communicate with this intermediary application through various methods like message queues, database tables, or file system interactions.


While it is not straightforward to call a web API directly from a SQL Server stored procedure due to the lack of native support and limited external access, there are several workarounds available. Depending on your environment and requirements, you can choose either CLR integration, external components, or an intermediate application as the solution for calling web APIs from within your stored procedures.

Remember to thoroughly evaluate the security implications and consider any performance overhead when implementing these solutions. Additionally, be aware of any potential limitations imposed by your organization’s policies or infrastructure configurations.

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