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Fiverr Pro
English
$
USD
I will develop or integrate any API
Daniel Marquez
About this gig
Still stuck connecting your app to the tools it needs?
API integration can fix that and that's exactly what I do.
I'm Daniel, an API developer with 10+ years of experience. I integrate and build APIs that connect your systems and automate data flow.
What You'll Get:
- Custom API development & integrations
- REST, SOAP & Webhook integrations
- Payment APIs: Stripe, PayPal, Coinbase
- Messaging APIs: Twilio, Sendgrid, Plivo
- CRM & marketing APIs: Active Campaign, Airtable
- Data APIs: Google Sheets, USPS, Shipment tracking
- Custom/private API integrations on request
- Error handling, auth & rate-limit management
- Clean documentation for maintenance
Tech I Work With:
Node.js, PHP, Laravel, WordPress, REST APIs, Webhooks, OAuth.
What Makes This Different:
- I'm a developer first, not just an integrator I fix the API when docs are messy or outdated
- 50+ products and systems delivered, generating $1M+ in measurable value for clients
- Integrations built to stay stable, not break on the next update
Note: Send your API docs link for an accurate quote, cost depends on complexity.
Ready to connect your systems the right way?
Message me and let's integrate your API.
Get to know Daniel Marquez
Daniel Marquez
AI Automation Developer, n8n workflow, n8n expert, AI Agents
- FromColombia
- Member sinceMar 2014
- Avg. response time1 hour
- Last delivery2 years
Languages
English, Spanish
Hey! I'm Daniel M — Automation Engineer (10+ yrs) building n8n workflows & AI agents that save businesses time and money. 🚀
🔁 n8n workflow automation
🤖 AI agents (Claude, GPT, Gemini)
📊 CRM & lead automation
🔗 API & webhook integrations
🗂️ Airtable, Notion & Sheets automation
🛒 E-commerce & order workflows
I also bring deep experience building SaaS, MVPs & scalable apps with Next.js, React, Node, Supabase & Firebase.
⚡ Fast delivery
🧠 Clean architecture
📈 Real, measurable results
My Portfolio
Other Software Development Services I Offer
FAQ
What kinds of APIs can you integrate?
A wide range — payment APIs like Stripe, PayPal, and Coinbase, messaging APIs like Twilio and Sendgrid, CRM/marketing APIs like Active Campaign and Airtable, plus shipment, data, and custom/private APIs. If it has documentation, I can likely integrate it.
I don't have an API yet, can you build one for me?
Yes. Beyond integrating third-party APIs, I also build custom APIs from scratch (REST APIs) if you need your own system to expose data or connect with other tools.
What do you need from me to get started?
Just send me the API documentation link for whatever you're integrating. From there I can give you an accurate quote based on the complexity, and let you know if anything (like credentials or sandbox access) is needed.
Can you fix an existing API integration that's broken or outdated?
Yes, I regularly fix integrations where documentation is outdated, endpoints have changed, or the original implementation wasn't handling errors or auth correctly.
Do you handle authentication and security for the integration?
Yes, I handle OAuth, API keys, and token-based auth properly, along with error handling and rate-limit management, so the integration doesn't break under normal use.
