Custom API Development Services in Singapore
Custom APIs, Built for How You Actually Work
From 2C2P to Salesforce and everything in between – we develop secure, scalable APIs tailored to your systems, your workflows, and your future growth.
APIs Designed to Work the Way You Do
We build RESTful APIs tailored to your business logic, security needs, and integration goals – from scratch or on top of existing architecture.
Internal APIs
Partner APIs
Enable secure, controlled access for third parties — vendors, resellers, mobile apps — through well-documented endpoints.
2C2P, Stripe, Payment APIs
Custom payment workflows using Stripe, 2C2P, eNets, or your own payment engine — built for local markets and compliance.
Analytics & BI APIs
Pull and transform data from various systems to populate dashboards, power reports, or feed ML models.
Open API Specification (OAS)
We build and document APIs using OpenAPI standards — making them easier to scale, test, and hand off to other teams or partners.
Whether it’s connecting legacy tools or enabling new services, we build APIs that speak your language and scale with you.
Why it Matters
Why API Development Matters
Your business doesn’t run on templates. Your APIs shouldn’t either.
Purpose-Built for Your Business
Pre-built connectors can’t account for how your teams actually work. A custom API adapts to your logic, not the other way around.
Designed for Change, Not Just Now
We build APIs with versioning, scalability, and OpenAPI documentation from day one — so your tech can grow with your business.
Automate What Matters Most
APIs remove manual work across systems (sales to finance, ops to fulfilment) so your people can do more with less friction.
Security Built In
From OAuth2 and access control to secure logging and monitoring — every API is designed to meet enterprise security standards.
The right API isn’t just a connection – it’s an unlock for better, faster, more aligned operations.
How We Work
How We Build APIs That Work
Discovery & Scoping
We audit your current systems, define data flows, and identify what your API needs to do — technically and operationally.
Architecture & Design
We design your API endpoints with RESTful principles, versioning logic, and long-term maintainability in mind. Every decision aligns with your stack.
Development & Security Layering
Our dev team builds the API, implements authentication (OAuth2, API keys, RBAC), and validates each endpoint for performance and edge cases.
Testing & Validation
We run functional tests, security checks, and error handling flows – and ensure your API behaves reliably across environments.
OpenAPI Documentation
Every API is delivered with clean, developer-ready documentation using OpenAPI spec. Easy to scale, easy to hand off.
Handover, Monitoring & Support
Security baked into every step
- OAuth2
- Rate limiting
- Role-based access
- Encrypted payloads
- Audit logs
Want to see how this would work for your use case?
Why Work with Webpuppies
We don’t just ship endpoints. We build stable, secure API infrastructure for growing businesses and government-backed systems.
25+ Years of Delivery Across Industries
From public sector to enterprise, we’ve built and maintained APIs that handle serious traffic, data, and compliance needs.
More Than Devs — Strategic Tech Partners
We think beyond code. Every project starts with planning, clarity, and scalable architecture designed for your business.
OpenAPI-First Approach
Every API we build includes developer-friendly, standards-based documentation — making it easier to test, maintain, and scale.
Enterprise-Grade Security by Default
Our APIs follow secure coding standards, with baked-in authentication, role-based access, and logging.
Built for Handover, Not Dependency
You own what we build. No black-box systems, no vendor lock-in – just clean code, clear documentation, and full transparency.
Singapore-Based, Regionally Trusted
We’re headquartered in Singapore, delivering solutions trusted by businesses and governments across Southeast Asia.
Looking for a partner, not just a coder?
Frequently Asked Questions about
API Integration
API development involves creating interfaces that allow different software systems to talk to each other. If your tools don’t integrate out of the box – or if you need to automate internal workflows – a custom API helps bridge those gaps.
API integration connects your existing tools using available APIs. API development, on the other hand, involves building a new API from scratch – often to expose your own system’s data or create a secure gateway for others to access it.
We’ve built APIs for fintech, government, education, logistics, and enterprise clients. If your business depends on accurate data, secure systems, or workflow automation — a custom API is often the cleanest solution.
Yes. We deliver every API with OpenAPI specification and documentation. This ensures your API is easier to test, maintain, and scale — and it saves your developers time down the road.
Security is built into every stage. We use OAuth2, role-based access, rate limiting, and secure authentication protocols. Our process includes security testing and logging for traceability.
Absolutely. We often develop APIs to help legacy or bespoke platforms connect with newer tools – making them more accessible without needing a complete rebuild.
It depends on complexity. A basic REST API with documentation might take 3 to 4 weeks. More complex projects involving multiple endpoints, integrations, or payment logic can range from 6 to 12 weeks.
You do. We provide full handover with OpenAPI documentation, so you’re never locked in. You can scale it, modify it, or let us manage it for you.
We can audit your existing API, identify security or performance issues, and either optimise or rebuild it based on best practices.
Yes. We offer optional support packages that cover monitoring, updates, versioning, and bug fixes — so your API stays reliable as your systems evolve.
