How many Apex callouts can be made per transaction in Salesforce?

In Salesforce, the platform imposes a limit of 10 Apex callouts per transaction. This limit ensures that resources are managed efficiently and prevents excessive reliance on external services, which could lead to performance degradation. Apex callouts are typically used to communicate with external web services, such as APIs, and adhering to this limit helps maintain system stability and reliability.

The Apex callout limit is part of Salesforce's broader set of governor limits designed to ensure a balanced use of shared resources across the multi-tenant architecture of the platform. Knowing this specific limit is crucial for architects and developers when designing solutions that interact with external systems, as it helps them plan the integration strategy and ensure that transactions do not exceed the allowable limits.

Understanding and adhering to these limits is essential for building robust and effective applications within Salesforce, especially in scenarios where multiple callouts are necessary to fulfill a business requirement.