API Development
Your Systems. Connected.
What We Do
Disconnected software is a hidden tax on your business. Your CRM does not talk to your billing system. Your e-commerce platform does not sync with your inventory tool. Your operations team exports spreadsheets that someone else manually imports somewhere else. The fix is not more software. It is a well-designed API layer that makes your existing systems work together.
We build RESTful and GraphQL APIs that serve as the backbone of your technical infrastructure. Custom APIs for new products, integration layers that connect third-party tools, webhook systems that trigger actions across platforms, and data pipelines that move information reliably and on schedule. Every API we build is versioned, documented, monitored, and secured from day one. We write the contracts first, then the code. That means your frontend teams, mobile developers, and third-party partners can work against a stable interface while we build behind it.
How We Work
API design starts with contract-first development. We define your endpoints, request and response schemas, authentication model, and error handling before writing any implementation code. This produces an OpenAPI specification that serves as the single source of truth for everyone building against your API. Development follows the specification. We build each endpoint with input validation, authentication checks, rate limiting, and structured error responses.
Tests are written alongside the code, covering happy paths and edge cases. Integration testing verifies behavior against real third-party systems in a sandboxed environment before going to production. Documentation is generated automatically from the specification and supplemented with usage examples. We set up logging, monitoring, and alerting so you know immediately when error rates spike or latency degrades. Ongoing, we offer API versioning support and backward compatibility management so integrations do not break when you need to evolve your data model.
Why Running Start Digital
Pricing
From $5,000
Typical turnaround: 4-12 weeks
Includes
Frequently Asked Questions
REST for most APIs. GraphQL when clients need flexible queries or you're serving multiple frontend apps with different data needs. We help you choose.
Yes. We work with Salesforce, HubSpot, Stripe, QuickBooks, Slack, and hundreds of other platforms. If it has an API, we can connect to it.
OAuth 2.0, API keys, rate limiting, input validation, and encrypted transport. Security is built into every layer, not bolted on.
Always. Every API we build ships with OpenAPI/Swagger documentation, example requests, and integration guides.
A focused API with 10 to 20 endpoints typically takes 4 to 8 weeks including documentation and testing. Complex APIs with many integrations, event systems, or real-time capabilities take 2 to 4 months.
Versioning, backward compatibility monitoring, dependency updates, security patching, and performance tuning. We also monitor uptime and error rates so issues are caught before your users notice.
Yes. Public APIs require additional investment in developer experience: clear documentation, sandbox environments, interactive API explorers, and developer support resources. We build the full developer portal alongside the API.
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Ready to get started?
Start with a $2,500 deposit. Balance due on delivery.