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I will integrate third party apis into your app or saas
Vasu Sagar
About this gig
Need to integrate a third-party API into your website, SaaS, or application?
I will build custom API integrations using clean, reliable code to connect your app with the tools and services your business needs.
My API integration services include:
- REST API and third-party API integration
- HubSpot CRM and contact synchronization
- ElevenLabs voice AI and agent integration
- Stripe payments, subscriptions, and webhooks
- OpenAI, Claude, and Gemini API integration
- Twilio, OAuth authentication, and custom APIs
- Webhook setup, API debugging, and error fixing
What you will get:
- Secure API credential handling
- Reliable data exchange and error handling
- Integration testing and debugging
- Clean, maintainable code
- Integration with your existing application
I work with React, Next.js, Node.js, JavaScript, TypeScript, and PostgreSQL.
Every API has different requirements.
Please contact me before ordering to discuss your API documentation, project scope, and expected results.
Let's connect your tools and make your application work seamlessly!
Get to know Vasu Sagar
Vasu Sagar
Full Stack, React Native And AI Developer
- FromPakistan
- Member sinceFeb 2019
- Avg. response time1 hour
- Last delivery2 years
Languages
Sindhi, English, Urdu
I'm a Full Stack Developer specializing in SaaS platforms, React Native mobile apps, REST APIs, and practical AI integrations.
I work with React, Next.js, Expo, Node.js, TypeScript, PostgreSQL, Firebase, OpenAI, Claude, and Gemini.
Whether you have a Figma design, existing codebase, or new product idea, I can help with frontend development, backend APIs, databases, AI features, testing, and deployment.
With a 5.0 Fiverr rating across 92 reviews, I focus on maintainable code, clear communication, and realistic project delivery.
Share your requirements, and I'll recommend the right approach.
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Other Software Development Services I Offer
FAQ
Which APIs can you integrate?
I can integrate REST APIs and services such as HubSpot, ElevenLabs, Stripe, Twilio, OpenAI, Claude, Gemini, and other APIs with proper documentation.
Can you integrate an API into my existing website or SaaS?
Yes. I can integrate third-party services into existing React, Next.js, Node.js, and other custom-coded applications.
Can you work with OAuth and API authentication?
Yes. I can implement supported authentication methods, including API keys, OAuth 2.0, and token-based authentication.
Do you provide webhook integration?
Yes. I can configure webhooks to receive events, synchronize data, and trigger actions between supported services.
Can you integrate HubSpot with my application?
Yes. I can connect HubSpot with your application for supported CRM operations, contact synchronization, and workflow automation.
Can you integrate ElevenLabs voice AI?
Yes. I can integrate supported ElevenLabs APIs for voice generation, conversational AI, and other suitable voice-related features.
Can you fix an existing API integration?
Yes. I can investigate API errors, authentication problems, failed requests, webhook issues, and data synchronization bugs.
Can you connect multiple APIs in one project?
Yes. I can connect multiple services depending on the scope. Please contact me first so I can review the requirements and provide an appropriate offer.
