System Connectivity

RESTful API Development & Integrations

Architecting secure, standardized API handshakes and custom RESTful endpoints following OpenAPI (Swagger) specifications. We build robust system bridges to link databases, payment systems, and third-party SaaS platforms seamlessly.

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Integrations We Build & Support

We integrate enterprise-grade APIs and construct secure webhooks to automate your digital processes.

Payment Gateways

Secure checkouts via Razorpay, Stripe, and PayPal. Custom webhook receivers, event verification hashes, and refund system linkages.

Notification Alert Systems

Official WhatsApp Cloud Business API alerting, automated Twilio SMS triggers, OTP verifications, and SendGrid/Amazon SES transactional email setups.

Social Auth & Identity

Secure OAuth 2.0 social sign-ins (Google Sign-In, LinkedIn API) to allow passwordless user onboarding and secure authentication scopes.

Custom REST Endpoints

Building secure web endpoints returning clean JSON payloads. Fully documented using OpenAPI / Swagger parameters and JWT token verifications.

Cloud Storage & CDN Sync

Automated connections with AWS S3, Google Cloud Storage, or Dropbox. Handles remote digital asset uploads, image optimizations, and fast content delivery network integrations.

CRM & Business ERP Sync

Synchronizing databases bi-directionally with Salesforce, HubSpot, or Zoho. Automates customer lead capture pushes, profile synchronization, and billing entries.

Payload Integrity & Gateway Handshakes

We structure defensive parameter validations to protect databases and maintain server speed.

JSON Web Token (JWT) Security

Securing custom API endpoints using bearer token headers to authenticate database CRUD requests and block malicious script access.

Webhook Signature Verification

We calculate SHA256 signature hashes of incoming transaction payloads, matching them against vendor headers to block mock billing attempts.

Auto-Retry & Rate Limiting

Structuring fallback cURL retry schedules for temporary network drops, and implementing token bucket rate limits to manage API request thresholds.

Our Core Engineering Directory

Explore other technical capabilities offered by the RSTech Solutions development team.

Custom Web Apps

ERP systems & client portals

Business Sites

High-performance static portfolios

E-commerce Stores

Scalable multi-vendor gateways

CodeIgniter MVC

Legacy code upgrades & patches

Database Optimization

Query indexings & load balancing

Frontend Crafting

AJAX dashboards & reactive layers

Support Contracts

SLA emergency monitoring & backups

API Integration FAQ

Quick technical integration questions answered.

Yes. We integrate the Meta WhatsApp Cloud API directly. We build custom curl scripts to send template messages (like transaction confirmations, booking alerts, and dispatch receipts) to your clients dynamically.

We intercept incoming webhook payloads, calculate local hashes using your webhook secret key, and verify that the output matches the signature header provided by Razorpay or Stripe, ensuring the request is authentic.

Yes. We write clean OpenAPI (Swagger) structured documentation, detailing request parameters, JSON payload keys, authentication headers, and standard response codes so third-party developers can link to your app easily.