How To Call APIs From SQL Server

With SQL Server 2025, Microsoft introduces a groundbreaking capability: native support for calling REST APIs directly from T-SQL using the new system stored procedure "sp_invoke_external_rest_endpoint".

This feature opens the door for integrating SQL Server more easily with external systems, cloud APIs, microservices, and more without needing CLR, SQL Agent jobs, or external scripting.

Sp_invoke_external_rest_endpoin is a built-in stored procedure introduced in SQL Server 2025 (v17.x) that allows SQL Server to make HTTP REST API calls directly from T-SQL and receive JSON responses.

This turns SQL Server into a more connected platform, enabling:

* Real-time integration with external services

* Triggering webhooks or third-party APIs

* Pushing data to Power BI, Microsoft Graph, or Azure Functions

* Querying external systems and merging results in T-SQL

Prerequisites -

* Before you can use sp_invoke_external_rest_endpoint, ensure:

* SQL Server 2025 is installed (17.x).

* You’re using a system administrator (sa) or a user with appropriate permissions.

* Your SQL Server is configured to allow outbound HTTPS traffic.

Security Considerations -

* Only HTTPS URLs are allowed.

* SQL Server must have internet access or DNS resolution to call public APIs.

* Ensure the token or key in headers is stored securely (e.g., in Azure Key Vault, or encrypted columns).

* Monitor network usage and rate limits of the APIs you're calling.

* Throttling, timeouts, and retries must be managed gracefully.

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