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Documentation Index

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Dualship is a visual API builder platform. Users create fully functional backend APIs without writing code by defining flows - JSON documents that describe how an API should behave.

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Core Concept

Instead of writing code, you define APIs as flows. A flow is a JSON document that describes:
  1. Trigger - How the API is invoked (HTTP request, cron schedule)
  2. Nodes - What steps to execute in sequence
  3. Response - What to return to the caller
These flows are stored as data and interpreted at runtime. When a request comes in, the executor processes the flow in real-time. No code generation. No deployment. The API is live the moment the flow is saved.

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How It Works

{
  "name": "Create Payment",
  "trigger": {
    "type": "http",
    "config": {
      "method": "POST",
      "path": "/payments"
    }
  },
  "nodes": [
    {
      "id": "validate",
      "type": "request",
      "config": {
        "source": "request.body",
        "schema": {
          "amount": "required|numeric|min:1",
          "email": "required|email"
        }
      }
    },
    {
      "id": "process",
      "type": "http",
      "config": {
        "method": "POST",
        "url": "https://api.stripe.com/charges",
        "body": {
          "amount": "{{request.body.amount}}",
          "email": "{{request.body.email}}"
        }
      }
    },
    {
      "id": "respond",
      "type": "response",
      "config": {
        "status": 200,
        "body": {
          "success": true,
          "charge_id": "{{process.output.body.id}}"
        }
      }
    }
  ]
}

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Key Features

FeatureDescription
12 Node TypesControl flow, data manipulation, HTTP requests, and more
Template ExpressionsReference data with {{path.to.value}} syntax
70+ PipesTransform data inline with filters like map, filter, sort
Parallel ExecutionRun multiple operations concurrently
Error HandlingTry-catch patterns for robust APIs
ValidationBuilt-in request validation with 50+ rules

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Node Categories

Nodes are organized into categories: Control Flow
  • condition - If/else branching
  • switch - Multi-way branching
  • parallel - Concurrent execution
  • loop - Iteration over arrays or counts
  • try - Error handling with catch/finally
Data Manipulation
  • set - Store values in context
  • transform - Reshape and compute data
HTTP/Network
  • http - Make outbound HTTP requests
Response/Abort
  • response - Send HTTP response
  • abort - Stop flow with error
Timing
  • delay - Pause execution
Validation
  • request - Validate incoming data

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Next Steps