Custom API Development
Custom API development means building an interface specifically for your systems - connecting your website to internal tools, mobile apps, or partner systems when no off-the-shelf integration covers what you need. FreeSoftwareX Digital builds APIs the same way we build integrations for our own web properties: documented, versioned, and tested before anything goes live.
We start by mapping out exactly what data needs to move between systems and how often, then design endpoints, authentication, and data formats around that. Depending on your needs this might be a REST or GraphQL API sitting in front of your database, a middleware layer connecting two existing systems, or a webhook-driven service that reacts to events in real time. We document every endpoint so your team, or future developers, can maintain it without guesswork.
Endpoint Design
API endpoints designed around your actual data and workflows, not a generic template that gets forced to fit.
Authentication & Security
Token-based or key-based authentication set up so only authorized systems can access your data.
Documentation
Clear, up-to-date documentation for every endpoint so your team or other developers can integrate against it confidently.
Testing & Versioning
APIs tested against real request and response scenarios and versioned so future changes don't break existing integrations.
How it Works
Requirements Mapping
We document exactly what data needs to move between which systems and how often, before writing any code.
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Build & Document
We build the API endpoints, set up authentication, and write documentation alongside the code.
Test & Deploy
We test against real request scenarios, then deploy and monitor the API once it's handling live traffic.
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Frequently Asked Questions
Custom API development means we build a new API from scratch for your systems. Third-party API integration means connecting your site or app to an API that already exists, like a payment processor or shipping carrier. We do both, depending on what you need.
It depends on how many endpoints you need and how complex the underlying data and business logic are. We'll scope this with you before starting.
We implement authentication (API keys or tokens), input validation, and rate limiting as standard practice - the specific security measures depend on what data the API handles and who needs access.
It depends on the number of endpoints and complexity of the integration. Contact us for a quote after we understand your requirements.
Access to or documentation of the systems that need to connect, and a clear picture of what data needs to move where. If that documentation doesn't exist yet, we can help map it out during discovery.
Basic monitoring for failures and error rates is part of the build. Ongoing active support and feature changes are available separately if you want continued involvement.
Start Your Project?
We're happy to talk through your goals and put together a plan — no obligation, no pressure.
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