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Mithun Das
API Gateway: Operational

Operational AI systems for businesses that have outgrown manual workflows.

I design automation architectures that connect your CRM, forms, WhatsApp, email, spreadsheets, internal tools, and AI assistants into reliable business workflows.

Lead Pipeline — Live Preview
v1.0
Inbound Events
Lead Form
WhatsApp
Email
Orchestration Layer
Validate
Route
AI Summary
Outputs
Store
Confirm
Alert
Execution TimelineAll Steps Passed
API Gateway
n8n Orchestrator
Lead Pipeline
AI Summary
Live Log Telemetry Stream
ACTIVE
Response Automation< 60s
Workflow VisibilityEvery Step
Integration PatternE2E Pipeline
Reliability PostureRetry + Alert
Operational Friction

Does any of this sound familiar?

These patterns appear in every business that has grown beyond what manual processes can handle reliably.

Slow Follow-Up

Leads wait hours for a response because routing depends on someone checking a shared inbox.

Duplicate Data Entry

The same customer information is typed into forms, sheets, CRMs, and internal tools by hand.

Missed Handoffs

Work stalls because one team doesn't know the previous step completed. Approvals stay pending.

No Visibility

Nobody knows if the workflow ran, failed, or is stuck until a customer complains.

Brittle Integrations

Zapier chains break silently. Nobody gets alerted. The fix requires rebuilding the whole flow.

After-Hours Gaps

Customer inquiries at night or weekends go unanswered until the next business day.

Operational Systems

Engineered automation, not generic services

Your business does not need another disconnected tool. It needs a reliable operating layer that routes work, updates systems, informs people, and uses AI where it improves speed or decision quality.

AI Customer Support

Problem

Teams lose time answering repetitive questions and miss after-hours inquiries.

Architecture

website/chat → API → AI response engine → escalation rules → CRM → notification

Impact

Faster first response, lower manual support load, better lead capture.

OpenAI APINext.jsn8nGoogle Sheets

WhatsApp Lead Automation

Problem

Leads from ads, forms, and WhatsApp get slow or inconsistent follow-up.

Architecture

lead event → validation → lead score → WhatsApp Cloud API → CRM → admin alert

Impact

Faster response, fewer lost leads, consistent lead handling.

WhatsApp APIn8nOpenAISheets

CRM & Operations Integration

Problem

Data is duplicated across forms, sheets, CRMs, inboxes, and internal tools.

Architecture

event router → normalization → deduplication → target systems → audit logs

Impact

Fewer errors, faster operations, better reporting.

WebhooksNode.jsn8nREST APIs

Document Processing & AI Summary

Problem

Teams manually read, classify, and summarize documents.

Architecture

upload/email trigger → validation → AI extraction → review queue → storage

Impact

Reduced processing time and better handoff quality.

OpenAI APINext.jsn8nMongoDB

Internal Approval Workflows

Problem

Approvals happen across chat, email, and spreadsheets without visibility.

Architecture

request form → approval matrix → notifications → decision log → dashboard

Impact

Predictable approvals and fewer stalled tasks.

Next.jsn8nEmailWhatsApp
System Architecture

How the pieces connect

Frontend, API, automation engine, data store, and notification channels — all integrated through a single pipeline architecture.

Integration PipelineEnd-to-End Execution Flow
Visitor
API
n8n
AI
Data
Email
WhatsApp
Admin
Frontend
  • Next.js App
  • Lead Form
  • Workflow Demo
  • Chatbot UI
API Layer
  • Zod Validation
  • Rate Limiting
  • HMAC Signing
  • Route Handlers
Orchestration
  • n8n Workflows
  • Lead Intake
  • Error Handling
  • Follow-Up
Data & AI
  • Google Sheets
  • OpenAI API
  • Lead Scoring
  • AI Summary
Notifications
  • Email (Resend)
  • WhatsApp API
  • Admin Alerts
  • Status Updates
Frequently Asked

Common questions

Ready to automate your operations?

Share your current workflow, tools, bottlenecks, timeline, and budget. You will receive a structured response with the likely automation approach, integration requirements, and next step.

Typical response within 24 hours · No commitment required