HubSpot API Integration: A Production Guide for B2B SaaS (2026)

Integrating HubSpot's CRM API into a B2B SaaS product involves several steps and operational considerations, including creating a developer account, configuring OAuth scopes, managing webhooks, and handling OAuth token refresh logic. While building a direct integration offers complete control and access to HubSpot's specific features, it also requires managing complex infrastructure, especially for multi-tenant applications. Alternatively, using Unified's CRM API simplifies the integration process by providing a unified API surface that handles OAuth exchanges, webhook retries, and schema mapping across multiple CRM providers, which can be advantageous for companies supporting various CRMs like Salesforce alongside HubSpot. Deciding between direct integration and using Unified's service depends on the breadth of CRM support needed, the desire to manage vendor-specific logic, and the preference for a usage-based pricing model.