REST vs GraphQL for CRM: Key Differences Explained

Two API Approaches, One Module

Data Builder for Perfex CRM provides both REST API and GraphQL from a single module. They share the same authentication layer, the same token scopes, and the same security pipeline. The question is not which one to install – it is which one to use for each task.

REST API Strengths

REST uses predictable URL-based endpoints with HTTP methods:

# List clients
GET https://databuilder.polyxgo.com/api/v1/clients?per_page=10&sort=-id

# Get single client
GET https://databuilder.polyxgo.com/api/v1/clients/42

# Create a new task
POST https://databuilder.polyxgo.com/api/v1/tasks
{"name": "Review contract", "rel_type": "project", "rel_id": 5}

Best for: Simple CRUD operations, webhook integrations, Zapier/Make.com automation, and scenarios where Postman testing matters.

GraphQL Strengths

GraphQL uses a single endpoint with flexible query language:

POST https://databuilder.polyxgo.com/api/v1/graphql

{
  clients(limit: 10, sort: "-id") {
    userid company email
  }
}

Best for: Mobile apps needing minimal data transfer, dashboards combining multiple resources, and frontend integrations that need flexible field selection.

Side-by-Side Comparison

When to Use Both Together

• Backend webhooks trigger REST calls to create/update records
• Frontend dashboards use GraphQL to fetch exactly what the UI needs
• Mobile apps use GraphQL to minimize bandwidth
• Polling triggers use REST ?since= parameter for incremental sync

Try both in the API Explorer | Get Data Builder