Procedure: Custom Integrations

Introduction

TODO: Explain when and why to create custom integration (2-3 paragraphs)

Who is this section for

TODO: Describe audience:

• Technical specialists
• Integrators
• Developers

When to Create Custom Integration

TODO: Use cases:

• App not in catalog
• Very specific logic
• Complicated API
• Complex transformation

Basic Architecture

TODO: Components:

1. Trigger (data input)
2. Transformation (normalization)
3. Action (data output)
4. Error handling

Diagram:

TODO: ASCII diagram

Step 1: Document the API

TODO: Before coding:

• Read API documentation
• Identify endpoints
• Required authentication
• Rate limits
• Input/output formats

Checklist:

• Auth documented
• Endpoints identified
• Rate limits known
• Payload example

Step 2: Prepare Authentication

TODO: Methods:

• API Key
• OAuth
• Bearer token
• Custom headers

Save securely:

1. Don’t hardcode credentials
2. Use environment variables
3. Or store in Gateway Ion credentials

Step 3: Create Base Flow

TODO: Base structure:

1. Trigger: Manual webhook or scheduled
2. Action: HTTP request
3. Transformation: Normalize response
4. Output: Save or notify

Templating:

TODO: Flow template

Step 4: HTTP Request

TODO: Configure request:

• Endpoint URL
• Method (GET, POST, etc)
• Headers (Authorization, Content-Type)
• Body (JSON)
• Timeout

Example:

TODO: HTTP config example

Step 5: Map Response

TODO: Process response:

• Extract relevant data
• Transform formats
• Validate types
• Handle errors

Transformation script:

// TODO: Mapping example
const respuesta = JSON.parse(input.body);
return {
  id: respuesta.data.id,
  nombre: respuesta.data.name.toUpperCase(),
  activo: respuesta.data.is_active
};

Step 6: Validations

TODO: Add validations:

• Correct status code?
• Complete data?
• Correct types?
• Values in range?

Conditions:

TODO: Validation example

Step 7: Error Handling

TODO: Error cases:

• 401: Authentication failed
• 404: Resource not found
• 429: Rate limit
• 500: Server error
• Timeout

Retry logic:

TODO: Retry pattern

Step 8: Testing

TODO: Test integration:

1. Manual API request
2. Test flow with real data
3. Verify transformation
4. Test error handling
5. Verify performance

Test checklist:

• Happy path works
• Errors are handled
• Data transformed correctly
• Acceptable performance

Step 9: Monitoring

TODO: Once in production:

• Logs of each integration
• Failure alerts
• Success metrics
• Periodic review

Integration dashboard:

• Calls per day
• Error rate
• Average time
• Last error

Step 10: Documentation

TODO: Document integration:

• How it works
• Required configuration
• Known limitations
• Troubleshooting

Common Errors

TODO: Table:

Error	Cause	Solution
”401 Unauthorized”	Invalid token	Refresh token
”429 Rate limit”	Too many requests	Add delay
”Timeout”	Slow response	Increase timeout

Advanced Tips

TODO: Advice:

• Use webhooks instead of polling when possible
• Implement caching
• Batch requests if possible
• Validate data early

Variations

TODO: Patterns:

1. Pull integration: Gateway Ion requests data
2. Push integration: App sends to Gateway Ion
3. Bidirectional: Both directions
4. Event-driven: Based on events

Next Steps

TODO: Expand:

• Performance optimization
• Multi-tenancy support
• API versioning
• Automated testing

See Also

• Integrations
• Webhooks
• Scripting