API Integration
Services
Connect your SaaS product to the tools your customers already use. Vertex Logics builds REST and GraphQL APIs, webhooks, and third-party integrations — extending your platform without rebuilding core features.
API & Integration Services
Build APIs and connect your SaaS product to the tools your customers use. Our integration services cover REST and GraphQL APIs, webhooks, CRM and payment gateways, OAuth, developer documentation, and production monitoring — extending your platform without rebuilding core features.
RESTful API Development
Expose your SaaS data and workflows through clean, versioned REST APIs. We design endpoints with rate limiting, API keys, and consistent response formats your partners and customers can rely on.
Learn MoreGraphQL API Development
Give clients flexible data access with a typed GraphQL layer. We design schemas, resolvers, and subscriptions that reduce over-fetching and keep your API efficient as your product grows.
Learn MoreWebhook & Event Systems
Push real-time updates to external systems when events happen in your platform. We build outbound webhooks with signed payloads, retry logic, and delivery monitoring your integrators can trust.
Learn MoreCRM & Payment Integrations
Connect billing, sales, and customer data to the tools your business runs on. We integrate Stripe, HubSpot, Salesforce, and other payment gateways and CRMs with tested end-to-end flows.
Learn MoreOAuth & Third-Party Auth
Let users sign in with Google, Microsoft, or enterprise SSO — and authorize third-party apps safely. We implement OAuth 2.0, token management, and social login flows built for SaaS security.
Learn MoreAPI Documentation & Developer Portals
Help developers integrate fast with clear docs and sandbox environments. We deliver OpenAPI/Swagger specs, SDKs, interactive docs, and developer portals that reduce support burden.
Learn MoreIntegration Testing & Monitoring
Ship integrations that do not break in production. We run E2E integration tests, implement error handling and logging, and set up uptime monitoring for APIs and webhook delivery.
Learn MoreAPI & Integration Technologies
We use a production-grade stack for reliable APIs, webhook delivery, and third-party connectivity — Node.js, GraphQL, Express, FastAPI, PostgreSQL, Redis, and cloud infrastructure built for integration performance at scale.
Node.js
GraphQL
REST API
Express.js
FastAPI
Python
TypeScript
PostgreSQL
Redis
MongoDB
Docker
AWS
Why Outsource to Us?
This is not just a dev shop you are hiring. You get to work with pros who care.
Proven Track Record
We keep promises and strike deadlines, delivering high-quality solutions that perform exceptionally.
Dedicated Team
Get access to a team that's fully committed to your success, from initial concept to final deployment.
Partnership Approach
We're not just vendors; we become an extension of your team, invested in your long-term success.
Let's build something that grows your business.
API Integration Process
Our end-to-end process moves from integration scoping and security planning through API development, third-party connections, documentation, and production monitoring — delivering integrations your customers and partners can depend on.
Integration Requirements & API Design
We map which systems to connect, what data flows between them, and who consumes your APIs. Together we define integration scope, endpoint contracts, and success criteria before development starts.
API Architecture & Security Planning
We design authentication, authorization, rate limits, and data scoping for every integration point. Security and credential management are planned upfront — not patched in after launch.
REST/GraphQL Endpoint Development
We build versioned REST endpoints and GraphQL schemas with consistent error handling and pagination. Every API is structured for external consumers, internal services, and future growth.
Third-Party Service Integration
We connect your platform to CRMs, payment gateways, analytics tools, and custom partner systems. Data sync, error recovery, and credential storage are implemented and tested end to end.
Webhooks & Event-Driven Systems
We implement outbound webhooks and event queues that notify external systems in real time. Signed payloads, retry policies, and delivery logs ensure partners receive reliable event data.
Testing, Documentation & SDKs
We write integration tests, publish OpenAPI/Swagger docs, and deliver SDKs where needed. Developers get sandbox environments and clear guides so they integrate without constant support tickets.
Deploy, Monitor & Maintain
We deploy APIs and integrations to production with monitoring, alerting, and logging configured. Post-launch, we track error rates, webhook delivery, and third-party API health as your platform scales.
Case Studies
See our real-time case studies, from startups to growing brands, and find out how we have developed quick, user-centric websites that achieve results and provide long-term impact.
Autosay AI
An innovative AI communication platform designed to streamline call flows and lead management with a clean, conversion-focused interface.
+45%
Call handling efficiency
99.9%
Platform uptime
Truth Health Quotes
Built a digital health marketplace with AI-based automation for insurance lead generation, optimized for speed, trust, and seamless user journeys.
+35%
Lead volume
+21%
Conversion rate
Enquiry Medical
We modernized their medical billing platform with AI-driven lead management, improving accessibility, performance, and conversion across every patient touchpoint.
+24%
Lead conversion
+38%
Page load speed
Frequently Asked Questions
Find answers to common questions about our services and development process.
APIs let customers and partners connect your product to their existing workflows — CRMs, billing systems, analytics tools, and custom apps. Integrations reduce manual data entry, increase stickiness, and open enterprise sales opportunities. Without them, your SaaS product stays isolated from the tools your users already rely on.
We integrate payment gateways like Stripe, CRMs like HubSpot and Salesforce, analytics platforms, email tools, accounting software, and custom partner APIs. If a service exposes a REST API, GraphQL endpoint, or webhook interface, we can connect it to your SaaS product with secure credential handling and tested data flows.
REST is ideal for straightforward CRUD operations, public partner APIs, and webhook-friendly architectures. GraphQL works well when clients need flexible data fetching across complex, nested resources. Many SaaS products use both — REST for webhooks and simple integrations, GraphQL for rich client applications. We recommend based on your consumers and data model.
We implement OAuth 2.0, API keys, JWT tokens, and scoped permissions with rate limiting. Webhook payloads are signed and verified. Third-party credentials are stored encrypted, never logged, and rotated on schedule. Every integration is tested for authorization bypass and data leakage before production deployment.
Yes. We audit your current architecture, design an integration layer that fits your codebase, and add APIs, webhooks, and third-party connections incrementally — minimizing disruption to existing users. Many products launch without a public API and add integrations as customer demand grows.
Empowering Business With Innovative and Robust Solutions
Clients Worldwide
Across various industries
Team Members
Experts in their fields
Satisfaction
Client satisfaction rate
Support
Round the clock assistance