01 — What it is

The service, in plain English.

No-code automation tools handle 80% of integration needs. The remaining 20% — and usually the most important 20% — requires actual engineering: custom APIs, webhook handlers, data transformation logic, error recovery, and rate limit management.

We build this layer. Whether you need Tally to sync with Shopify, a custom ERP to feed your CRM, or a proprietary POS system to power your marketing automation, we engineer integrations that run reliably at scale.

Our API work includes design, authentication (OAuth, API keys, JWT), versioning, rate limiting, queuing, error handling, logging, and monitoring. It's built to a production standard — not duct-taped together.

02 — Who it's for

This is built for you if...

  • You need to connect tools that don't have native Zapier integrations
  • Your data volume exceeds no-code platform limits (10,000+ operations/day)
  • You run custom-built software that needs to sync with SaaS tools
  • You need real-time, bi-directional sync — not periodic batch updates
  • You need SOC 2 or GDPR compliant data flows
  • You want to own the integration code (not rent it via Zapier forever)
Api Data Sync Service
03 — Deliverables

What's included.

Every engagement comes with these core deliverables. No surprises, no "that's extra" conversations.

API integration architecture document

Custom-built middleware or integration scripts (Node.js / Python)

OAuth / API key / JWT authentication handled securely

Rate limit management and exponential backoff retry logic

Error logging and alerting via Sentry / Datadog / Slack

Data transformation and mapping layer

Full code handover with documentation

Deployment to your infrastructure or ours (AWS, Vercel, Railway)

30–90 days of post-launch monitoring and support

Tools we specialize in
REST APIsGraphQLWebhooksOAuth 2.0Node.jsPythonPostmanAWS LambdaVercelRailwayn8n Self-hostedREST APIsGraphQLWebhooksOAuth 2.0Node.jsPythonPostmanAWS LambdaVercelRailwayn8n Self-hosted
04 — Typical Outcomes

What you should expect to gain.

Here is the range of outcomes we design towards. Actual results vary significantly by business, scale, and execution.

🔌

Any tool connected

If it has an API or can send a webhook, we can integrate it — including legacy systems.

Real-time sync

Bi-directional updates in seconds, not hourly batches.

🛡️

Production reliability

High uptime with error recovery, logging, and monitoring.

💰

Long-term ownership

You own the code. No vendor lock-in. No per-operation costs.

05 — Our Process

How we deliver this specifically.

01 / SCOPE

Technical discovery

We audit both systems' APIs, data models, and authentication methods.

02 / ARCHITECT

Integration design

Written architecture doc covering data flow, error handling, and deployment strategy.

03 / BUILD

Engineering

Middleware built in sandbox, tested with production-like data volumes and edge cases.

04 / DEPLOY

Launch & monitor

Deployed to your infrastructure. Monitoring and alerts configured. Code handed over.

06 — Pricing

Starts at ₹50,000

Final pricing depends on scope, tool count, and integration complexity. Every engagement is quoted fixed-scope after discovery.

See Full Pricing Details →
MINI CASE STUDY

Custom ERP ↔ Shopify ↔ Tally real-time sync for a manufacturer

Challenge

A furniture manufacturer used a custom ERP, Shopify for their consumer line, and Tally for accounting. All three had critical data — none of them synced. Monthly reconciliation took 20 hours.

Solution

Built a Node.js middleware deployed on AWS Lambda that receives webhooks from each system, transforms data, and updates the others in real-time. Includes error recovery, audit logging, and a manual review queue for edge cases.

Tools

Node.js · AWS Lambda · Shopify API · Tally API · Custom ERP API · PostgreSQL · Sentry

RESULTS
Reconciliation time20h → 10min
Data accuracy89% → 99.7%
Inventory sync delay24h → 30s
Monthly cost savings₹1.2L
07 — FAQ

Quick answers.

Can you integrate a system that only has a legacy SOAP API?
+
Yes. We've worked with SOAP, XML-RPC, FTP-based data exchange, and even email-based integrations. Older ≠ impossible.
Where does the integration code live?
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Wherever you want. Your AWS account, Vercel, Railway, or our managed infrastructure with a monthly retainer. You always own the code.
Will this scale to millions of records?
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Yes, with proper architecture. We use queuing (AWS SQS, BullMQ), rate limit management, and batch processing patterns. We've built integrations handling 500K+ daily operations.
Do you write tests?
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For custom API work, yes. We write integration tests for critical paths and document how to run them. You can modify the code confidently after handover.
What happens if the third-party API changes?
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We design for this. When possible, we use versioned API endpoints. For breaking changes, we offer maintenance retainers that include API update management.

Ready to get started with api?

Book a free 30-minute consultation. We'll scope the exact project for your business and give you a timeline and quote within 48 hours.

Book My Free Audit
📞 +91 98759 15265 ✉️ hello@reedy360sync.site 📍 Guwahati, Assam · Remote Worldwide

Results disclaimer: Case studies, metrics, and outcomes shared on this page reflect specific client engagements. Individual results vary based on business size, industry, existing systems, and implementation. Past performance does not guarantee future results.

Not affiliated with any third-party platform: Reedy 360 Sync is an independent automation services agency. We are not owned by, sponsored by, endorsed by, or officially affiliated with Google, Meta, WhatsApp, HubSpot, Zoho, Salesforce, Shopify, Zapier, Make.com, OpenAI, Anthropic, or any other platform referenced on this website. All trademarks, logos, and brand names are the property of their respective owners and are used only for informational and descriptive purposes.