Third-Party API Integration That Powers Your Business Workflows
We integrate WhatsApp Business API, PAN verification, GSTIN/GST verification, KYC and identity APIs, SMS and email gateways, and Aadhaar eSign into your applications — with custom REST/GraphQL connectors, webhook orchestration, and production-grade error handling for India-first compliance.
Messaging & Notifications
KYC APIs
PAN & GST Verification
Webhooks
Retries & Orchestration
Connect External Services Without Breaking Your App
Modern business apps depend on dozens of external APIs — for customer communication, identity verification, tax compliance, and transactional notifications. Each provider has different auth schemes, rate limits, and webhook formats. XtremeDevelop builds a unified integration layer so your team calls one internal API instead of juggling vendor documentation.
From onboarding flows that verify PAN and GSTIN in real time to WhatsApp order updates and Aadhaar eSign for contracts, we implement integrations with compliance awareness, retry logic, and audit trails your operations and legal teams can trust.
What You Receive
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Unified Integration Layer
Single internal API wrapping WhatsApp, KYC, SMS, email, and eSign providers with consistent request/response formats.
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Verification Workflows
PAN, GSTIN, and identity checks embedded in onboarding, vendor registration, and compliance dashboards.
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Webhook Orchestration
Event routing, retry queues, dead-letter handling, and admin logs for every inbound and outbound API event.
Core Third-Party API Capabilities
Business-critical integrations for communication, compliance, and identity verification.
WhatsApp Business Messaging
Template messages, order notifications, OTP delivery, chatbot handoffs, and two-way customer support via WhatsApp Business API with session management.
PAN Verification API
Real-time PAN validation against NSDL/income tax records for vendor onboarding, payout verification, and KYC compliance workflows.
GSTIN & GST Verification
GSTIN lookup, business name matching, return filing status checks, and e-invoice/e-way bill API integration for B2B platforms.
KYC & Identity APIs
Bank account verification, driving licence, voter ID, and other identity document checks via licensed KYC API providers.
SMS & Email Gateways
Transactional SMS via DLT-registered templates, email delivery via SendGrid/SES/Mailgun, and delivery status tracking with fallback providers.
Aadhaar eSign Integration
Legally valid Aadhaar-based eSign for agreements and onboarding documents — implemented with UIDAI compliance requirements and audit logging.
Custom REST & GraphQL Connectors
Bespoke adapters for any REST, GraphQL, or SOAP API — with auth token refresh, pagination handling, and data transformation layers.
Webhook Orchestration
Central webhook hub that receives events from multiple providers, validates signatures, routes to the right handler, and maintains event history.
Error Handling & Retries
Exponential backoff, circuit breakers, dead-letter queues, and alerting when third-party APIs fail — so transient outages do not break user flows.
APIs & Integration Stack
Trusted third-party providers wired into production-ready integration layers.
Our 4-Step API Integration Process
Structured delivery from vendor selection to production events.
API Audit & Mapping
Identify required third-party APIs, review documentation, auth flows, rate limits, and compliance requirements for each provider.
Sandbox Integration
Build and test connectors in sandbox environments — validate PAN/GST lookups, WhatsApp templates, and webhook payloads.
Production Wiring
Deploy unified API layer with retry logic, webhook orchestration, and embed integrations into your app workflows.
Monitor & Maintain
Set up API health dashboards, alerting, and documentation so your team can onboard new providers without starting from scratch.
Why Partner With XtremeDevelop
Integration expertise grounded in Indian compliance and global API best practices.
Compliance-Aware
PAN, GST, Aadhaar eSign, and DLT SMS integrations implemented with regulatory requirements and audit trails in mind.
One Layer, Many Providers
Swap or add API providers without rewriting your application — our abstraction layer keeps vendor changes isolated.
Resilient by Default
Retries, fallbacks, and circuit breakers built in — so a third-party outage does not take down your customer experience.
Related Services
Extend your integration stack with payments, custom APIs, and web platforms.
Payment Gateway Integration
Razorpay, Stripe, and PayPal checkout wired alongside your KYC and notification APIs.
API Development
Custom REST and GraphQL APIs that expose your integrated services to web and mobile clients.
Web Development
Portals and dashboards that surface verification status, WhatsApp threads, and API event logs.
Ready to Connect Your Business APIs?
Tell us which third-party services you need — we will map integration scope, compliance requirements, and delivery timeline.