SaaS API Development

Good API design starts before the first line of code. We produce an API specification using OpenAPI 3.0 or GraphQL SDL that defines every endpoint, request shape, response shape, error format, and authentication requirement. You review and approve the contract before implementation begins, eliminating misunderstandings between front-end and back-end teams.

Our REST APIs follow resource-oriented design with consistent naming, proper HTTP method usage, pagination, filtering, and sorting conventions. GraphQL APIs use schema-first design with clear type hierarchies, input validation, and query complexity limits that prevent abuse.

Versioning strategy is decided upfront. For REST we use URL-based versioning with a deprecation policy that gives consumers time to migrate. For GraphQL we use the evolving schema approach with field-level deprecation annotations.

API security has multiple layers. Authentication verifies identity via API keys, OAuth 2.0 tokens, or JWT. Authorization checks that the authenticated identity has permission to perform the requested action. Rate limiting prevents abuse by capping requests per time window, with different limits for different plan tiers.

We implement API key management with scoped permissions so customers can create keys with the minimum access needed for each integration. Key rotation is supported without downtime — new and old keys are valid concurrently during a configurable overlap period.

An undocumented API is an unusable API. We generate interactive documentation from OpenAPI specs using Redoc or Swagger UI, with runnable examples for every endpoint. Authentication is explained step by step, error codes are cataloged with descriptions and resolution guidance, and pagination patterns are demonstrated with working code.

For high-value integrations, we build SDKs in JavaScript, Python, and other languages your customers use. SDKs are auto-generated from the OpenAPI spec with custom wrappers for authentication, error handling, and retry logic. This reduces integration time from days to hours.

We also provide a sandbox environment where developers can test API calls against sample data without affecting production. Sandbox access is available with a free API key — no sales call required.

Every API call is logged with request metadata, response status, latency, and the identity of the caller. These logs feed into dashboards that track request volume, error rates, latency percentiles, and usage by customer. Anomaly detection alerts you when error rates spike or a specific customer's usage pattern changes dramatically.

API analytics also inform product decisions. Which endpoints are most popular? Which are never used? Where do customers encounter errors most frequently? These insights guide your roadmap and help you deprecate unused features with confidence.