GraphQL API

Flexible, type-safe API with real-time capabilities

JustKalm offers a powerful GraphQL API alongside REST, enabling precise data fetching, real-time subscriptions, and seamless microservice federation.

GraphQL Performance

Production metrics at scale

12ms

Avg Response

847

Schema Types

100%

Type Coverage

Concurrent WS

Why GraphQL?

Precise Data Fetching

Request exactly what you need
No over-fetching or under-fetching
Reduce bandwidth usage
Mobile-optimized payloads

Strong Typing

Schema-first development
Auto-generated TypeScript
IDE autocompletion
Compile-time validation

Real-time Updates

WebSocket subscriptions
Push-based updates
Automatic reconnection
Connection multiplexing

Quick Start

# GraphQL endpoint
POST https://api.justkalm.com/graphql

# Example query
query GetValuation($id: ID!) {
  valuation(id: $id) {
    id
    status
    estimatedValue {
      amount
      currency
      confidence
    }
    item {
      brand
      model
      category
      condition
    }
    factors {
      name
      impact
      score
    }
  }
}

# Variables
{
  "id": "val_abc123"
}

GraphQL API built with Apollo Federation and graphql-ws for subscriptions