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Fiverr Pro
English
$
USD
I will develop or fix any API integration
Moussa Bistami
Level 2
About this gig
Need your app, website or business tools to exchange data reliably? I provide secure API integration, REST API development, webhook integration and third-party API troubleshooting.
WHAT I CAN INTEGRATE
- Payments: Stripe, PayPal and subscription systems
- CRMs: HubSpot, Salesforce and Zoho
- Communication: Twilio, WhatsApp, Slack and Discord
- Commerce: Shopify and WooCommerce
- Google APIs: Sheets, Drive, Maps and Calendar
- Custom REST APIs, GraphQL, OAuth and webhooks
WHAT YOU RECEIVE
- Clean and maintainable source code
- Secure authentication and credential handling
- Data validation, error handling and logging
- API testing and debugging
- Documentation and a walkthrough video
- Clear progress updates
I work with Node.js, NestJS, Express, Next.js, TypeScript, Python, FastAPI, PostgreSQL and MongoDB.
Packages cover standard integrations with documented APIs. Complex payment systems, undocumented APIs, data migrations and custom infrastructure require a custom offer.
One endpoint means one API operation, such as retrieving a customer, creating an order or processing a webhook.
Get to know Moussa Bistami
Moussa Bistami
AI Automation Developer, AI Agents, Chatbots, n8n, Mobile Apps, API Integration
Level 2
- FromMorocco
- Member sinceAug 2013
- Avg. response time1 hour
- Last delivery3 weeks
Languages
English, French, Arabic, Italian, Chinese
I'm Moussa, a developer with 6+ years of experience building AI automation systems, AI agents and custom chatbots.
I build n8n and Make workflows, GPT chatbots, RAG assistants, CRM and API integrations that connect the tools your business already uses. I also build Flutter and React Native apps and publish them to the App Store and Google Play.
Stack: n8n, OpenAI, LangChain, Node.js, Next.js, React, Flutter, React Native, Python.
Tell me the process you want automated and I'll map it out before you order.
My Portfolio
Other Software Development Services I Offer
FAQ
1. Which third-party APIs can you integrate?
I integrate Stripe, PayPal, Shopify, WooCommerce, HubSpot, Salesforce, Zoho, Twilio, WhatsApp Cloud API, Slack, Discord, Google APIs, OpenAI API, Airtable and other documented third-party REST or GraphQL APIs.
2. Can you develop or fix a REST API integration?
Yes. I can build, debug or repair REST API integrations, failed requests, incorrect responses, data mapping, pagination, rate limits, timeouts, authentication errors and unreliable connections between applications.
3. Do you provide webhook integration and debugging?
Yes. I build and troubleshoot webhooks for real-time events, payment notifications, CRM updates, order synchronization and workflow automation. This includes signature verification, retries, duplicate-event protection, logging and testing.
4. Can you integrate Stripe, PayPal or another payment API?
Yes. I provide Stripe API, Stripe Checkout, subscriptions, Stripe Connect, payment webhook and PayPal API integration. Payment marketplace architecture, complex billing systems and migrations require a custom quote.
5. Can you connect APIs with n8n, Zapier or Make?
Yes. I can connect custom APIs and webhooks with n8n, Zapier or Make for CRM automation, lead routing, notifications, data synchronization and business workflows. I can also build a custom coded integration when no suitable connector exists.
6. Which API authentication methods do you support?
I work with API keys, OAuth 2.0, JWT, Basic Authentication, bearer tokens, refresh tokens and custom authentication flows. Credentials are stored securely using environment variables and appropriate access controls.
7. Which programming languages and frameworks do you use?
I build API integrations using JavaScript, TypeScript, Node.js, NestJS, Express, Next.js, Python and FastAPI, with PostgreSQL, MongoDB, Redis and external SaaS platforms when required.
8. Can you integrate an API into an existing website or application?
Yes. I can add a third-party API to an existing React, Next.js, Node.js or Python application. Please provide repository access, API documentation, the required workflow and details about the current environment.
9. Do you work with REST, GraphQL and SOAP APIs?
Yes. I primarily develop and integrate REST and GraphQL APIs, and I can work with documented SOAP APIs. I support JSON and XML data, custom headers, pagination, file uploads and secure server-to-server communication.
10. What is included after the API integration is completed?
You receive tested source code, error handling, detailed code comments, setup instructions and API documentation when applicable. Packages also include seven days of support for bugs directly related to the delivered integration.
