Salesforce API: A Complete Guide (2026)

The Salesforce API is a comprehensive portfolio of integration surfaces, including REST, Bulk 2.0, Pub/Sub, Composite, and others, optimized for various use cases like CRUD operations, high-volume asynchronous loads, event-driven integrations, and multi-object transactions. As of Spring 2026, the current API version is v66.0, and the Pub/Sub API is recommended for new event-driven integrations. Key considerations for B2B SaaS teams integrating with Salesforce include selecting the appropriate API, managing OAuth across environments, and adhering to governance limits such as daily API request pools and concurrent long-running request caps. Salesforce recommends using My Domain-specific OAuth endpoints and External Client Apps for new integrations, while Connected Apps remain for existing setups. For complex integrations involving multiple CRM systems, Unified's CRM API offers a single integration surface, streamlining processes such as OAuth lifecycle management, API version migration, and real-time event handling across different CRMs.

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