Your SaaS product's API is its most critical interface -- it powers integrations, enables third-party developers, and often generates more usage than the UI. We design and build RESTful and GraphQL APIs with OpenAPI specification, intelligent rate limiting, real-time webhooks, developer sandboxes, and versioning strategies that let you evolve your API without breaking existing consumers.
INR 2000
Per Hour
30+
SaaS Products Built
4.9/5
Client Rating
<4 Weeks
MVP Delivery
Integrates with the tools you already use
Production-grade APIs that power integrations, enable developers, and scale with your SaaS platform
API-first design starting with a comprehensive OpenAPI 3.1 specification that defines every endpoint, request/response schema, authentication method, and error code. The spec serves as a single source of truth for code generation, documentation, SDK creation, and contract testing between frontend and backend teams.
Multi-tiered rate limiting based on API keys, subscription plans, and endpoint sensitivity. Sliding window counters using Redis for precise, high-performance throttling. Custom rate limit headers (X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset) so consumers can implement adaptive backoff. Burst allowances for legitimate traffic spikes.
Event-driven webhook system that notifies external systems when important events occur in your SaaS product. HMAC signature verification for payload authenticity, automatic retries with exponential backoff for failed deliveries, webhook delivery logs, and a self-service portal where developers configure endpoints and subscribe to specific event types.
Isolated sandbox environments where developers can test API integrations without affecting production data. Pre-seeded test data, deterministic responses for predictable testing, and sandbox-specific API keys. Interactive API explorer (like Swagger UI or Stoplight) with try-it-out functionality directly in the documentation.
Future-proof versioning using URL path versioning (v1, v2), header-based versioning, or content negotiation -- chosen based on your developer ecosystem. Deprecation policies with sunset headers, migration guides, and backward-compatible changes that do not require version bumps. Parallel version support during transition periods.
Beautiful, interactive API documentation generated directly from your OpenAPI spec. Code samples in multiple languages (cURL, Python, JavaScript, Go, Ruby), authentication guides, pagination patterns, error handling reference, and changelog. Documentation stays in sync with your codebase automatically through CI/CD pipeline integration.
p95 API Latency
API Uptime
OpenAPI Coverage
SDK Languages
A proven 5-step process to build APIs that developers love integrating with
Flexible engagement models for SaaS API development
"Edesy designed our public API from scratch using API-first methodology. The OpenAPI spec they created was so thorough that our frontend team and three integration partners could work in parallel without a single breaking mismatch. Our API now handles 2 million requests per day with p95 latency under 80ms."
C
CTO
Technology at Data Platform SaaS (Series B)
"The webhook system Edesy built is rock solid. We have 400+ webhook endpoints registered by our customers, processing 50,000+ events daily with a 99.97% delivery success rate. The retry logic and delivery logs give our customers complete visibility into event processing."
VE
VP Engineering
Engineering at E-Commerce Integration Platform
"Our developer adoption rate tripled after Edesy rebuilt our API documentation and added the interactive sandbox. Developers go from signup to first successful API call in under 5 minutes. The code samples in Python, JavaScript, and cURL saved us hundreds of support tickets."
HO
Head of Developer Relations
Developer Relations at Communication API Startup
Resources to help you evaluate and implement
Get a free consultation on API design and architecture for your SaaS product. Our API experts will help you define the right specification, versioning strategy, and developer experience to make your API a competitive advantage.