Phiof Digital logophiof.custom software

API development

Whether you need to expose your own data to a partner, or connect to a third party with a difficult API, we design and build clean, documented, secure APIs that hold up in production.

  • Clean, documented endpoints
  • Proper authentication & security
  • Monitoring & versioning
  • Legacy & third-party integration

Well-documented APIs that connect your stack cleanly.

Transparent pricing

Priced up front. No day-rate surprises.

Single endpoint set

£4,000 – £10,000
per API

A focused set of endpoints exposing or consuming one clear function.

Full API layer

£10,000 – £25,000
fixed price

A complete, documented API layer across multiple resources and consumers.

Legacy or complex integration

£8,000 – £20,000
per integration

Poorly documented, legacy or SOAP-based systems that need careful, patient engineering.

01

Map the data & consumers

We identify what data needs to move, and who or what will consume it.

02

Fixed scope & price

A clear, fixed quote for the API before any code is written.

03

Build & document

We build the endpoints and ship documentation alongside the code, not as an afterthought.

04

Monitor & hand over

We hand over a monitored, versioned API that's yours to keep and extend.

Signs you need this

If any of these sound familiar, api development will pay for itself.

  • A partner or customer needs data from your system and there's no clean way to give it to them
  • You're maintaining a fragile, undocumented internal API nobody wants to touch
  • Integrating with a third-party API keeps breaking and no one can explain why
  • You need authentication, rate limiting and monitoring done properly, not bolted on

Brands we've worked with

Anthem Music School logo
Beko PL logo
Audacious Church logo
New Vision Media logo
Making Home logo
Digital products & media

A custom subscription platform for selling digital products

A bespoke ecommerce and membership platform for selling digital products, with Stripe subscriptions, one-off purchases and gated member access.

  • Recurring revenue on Stripe
  • Automatic access provisioning
  • Members-only content library
Read the New Vision Media case study
What's included

Everything needed to make it work end to end.

Clean, documented endpoints

APIs designed around clear resources and documented so any developer can pick them up.

Proper authentication & security

Token-based auth, rate limiting and access control built in from the start, not added later.

Monitoring & versioning

Logged, monitored endpoints with a versioning strategy so changes don't break existing integrations.

Legacy & third-party integration

We take on the awkward SOAP APIs and undocumented systems other teams avoid.

Not sure api development is the right fix?

Answer four quick questions and we'll match you with the right next step — then grab a time that works. No hard sell, just an honest read on what it would take.

FAQs

REST is our default for most business integrations, but we'll scope GraphQL, webhooks or other approaches when they genuinely fit the use case better.

Yes — every API we build ships with documentation covering endpoints, authentication and example requests, so any developer can integrate without needing us in the room.

Token-based authentication, rate limiting and access control are built in from the start, along with logging so you can see exactly who's calling what.

That's exactly the work we take on. Legacy and poorly documented systems typically fall in the £8,000–£20,000 range, scoped and fixed up front.

You do. The code, documentation and infrastructure are handed over as your asset, with no ongoing licence or lock-in.