API Dev United Kingdom

API Development Agency in Birmingham, United Kingdom

Clean, documented APIs that developers love working with. Whipp Studio is a web development agency specialising in api development for startups, SaaS companies, and growing businesses in Birmingham — the UK's second-largest city by population with significant HSBC and KPMG UK HQs.

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Typical Investment

$5K – $30K

Timeline

3 – 10 weeks

Projects Shipped

100+

About Whipp Studio

Whipp Studio is a web development agency specialising in api development for founders, startups, and growing businesses. We have shipped 100+ production projects for clients across United Kingdom and beyond — from MVPs that won first customers to SaaS platforms processing millions in revenue. Our team is senior, our process is structured, and our code is built to last.

Based remotely · Serving Birmingham, United Kingdom · hey@whipp.studio · whipp.studio

Why Birmingham

Why hire a API Development agency for your Birmingham business?

Birmingham is the UK's second-largest city by population with significant HSBC and KPMG UK HQs. Businesses operating in this market face specific competitive pressures — and digital products that convert, perform, and scale are the difference between winning and losing.

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API Dev expertise, not generalism

We specialise in api development — not a twenty-service agency where your project lands with a junior. Every engineer on your project has shipped production API Dev before.

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Serving Birmingham businesses remotely

We work with clients across United Kingdom fully remotely. Timezone-aligned communication, weekly video calls, and transparent project management — no office visits required.

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Fixed-price delivery

Every project starts with a detailed scope and a fixed price. You know exactly what you are getting for $5K – $30K — no hourly billing surprises.

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3 – 10 weeks — not six months

We move fast without cutting corners. Our 3 – 10 weeks timeline means you have a production product — not a wireframe or a prototype — ready to generate revenue or raise funding.

The Service

What is API Development?

We design and build RESTful and GraphQL APIs that are a pleasure to work with — consistent naming, predictable responses, comprehensive documentation, and the error handling that makes your integration partners happy.

Tech stack we use

Node.js TypeScript Fastify GraphQL Swagger

Deliverables

What you get with our API Development service

A versioned API with OpenAPI or GraphQL schema documentation

Authentication with API keys, JWT, and OAuth flows

Rate limiting and usage analytics per consumer

SDK generation for your most common client languages

How We Work

Our API Development process

Discovery Call

A free 30-minute call to understand your goals, constraints, and whether we are the right partner for your Birmingham project.

Scope & Proposal

We produce a detailed scope document, technical approach, and fixed-price proposal. No surprises, no hourly billing ambiguity.

Design & Build

We work in focused sprints — you see working software every week. Regular updates, no disappearing for months.

Launch & Support

We deploy your project, monitor the launch, and provide 30 days of post-launch support as standard.

Pricing

API Development cost in Birmingham

Our api development projects in Birmingham range from $5K – $30K, depending on scope and complexity. Every project starts with a free scoping call and a fixed-price proposal — so you know exactly what you are committing to before work begins.

What affects pricing: scope complexity, number of integrations, design requirements, and timeline constraints. We will give you an honest estimate on the discovery call — and we hold to it.

Get a Fixed-Price Quote →

API Development in Birmingham — FAQ

REST or GraphQL — which should I build in Birmingham? +

REST is simpler to implement, cache, and document — ideal when you have a known set of consumers. GraphQL shines when clients need flexible data shapes, have very different data requirements, or when you want a single endpoint for a complex data graph. We recommend REST for most APIs and GraphQL for product APIs with diverse consumers.

How do you document APIs? +

We generate OpenAPI 3.0 documentation from code annotations — never hand-written YAML that gets out of date. The documentation is served as an interactive Swagger UI. For GraphQL, we use GraphQL Playground with descriptions on every field.

How do you version APIs to avoid breaking changes? +

We use URL versioning (/v1/, /v2/) for REST APIs and deprecation notices for fields in GraphQL. We maintain previous API versions for a documented sunset period so consumers have time to migrate.

Can you build a public API for our product? +

Yes. We build public APIs with API key management, usage dashboards, rate limiting tiers, and developer documentation. We have built public APIs for SaaS products that now power thousands of integrations.

How do you test APIs to ensure they work correctly? +

We write integration tests that call the API endpoints with real requests and validate responses. We also set up contract tests to ensure API changes do not break existing consumers. All tests run in CI on every commit.

API Development in other United Kingdom cities

Other services in Birmingham

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Birmingham · API Development

Ready to build your API Dev in Birmingham?

Book a free 30-minute strategy call. We will review your project, give you an honest assessment, and provide a fixed-price quote if we are a good fit.

Book a Free Strategy Call →

Or email us at hey@whipp.studio