I will build a custom API integration for your business workflow

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Preston Wilms

About this gig

Move information between your business tools with a clearly scoped custom API integration.


I run Fortitudo. I will review your process and API documentation, implement the agreed connection in TypeScript, test success and failure cases, and deliver commented source code with setup instructions.


Basic: two documented services, one simple one-way action. Standard: two services, field mapping and up to three actions. Premium: up to three services and five agreed actions. Every package includes error logging, test evidence and a handoff guide.


Send the systems, trigger, desired output, API documentation and sample data before ordering. Your accounts must have the required API access.


Hosting, API usage and paid software are separate. Historical data migration, dashboards, databases, custom authentication providers, ongoing monitoring and autonomous financial actions are excluded. AI features require a separate custom offer.


Selected Fortitudo projects include Chippi (usechippi.com) and Cadre (cadre.to); see the attached portfolio.


Message me through Fiverr to confirm workflow fit.

Get to know Preston Wilms

Preston Wilms

Founder of Fortitudo Agency

  • FromUnited States
  • Member sinceMay 2021
  • Avg. response time1 hour
  • Languages

    English, Spanish
I’m Preston Wilms, founder of Fortitudo Agency. I help businesses build professional websites, Shopify stores, landing pages, funnels, and AI powered systems designed to improve trust, clarity, and conversions. My background includes ecommerce, paid ads, web design, branding, automation, and business strategy. I focus on clean design, clear messaging, and practical execution so every project looks polished and supports real business growth.