A SaaS product with a well-designed public API becomes a platform. Products without one stay point solutions.
We build public-facing APIs, webhook systems, and third-party integration libraries for SaaS products — the developer experience layer that lets your customers integrate your product into their tech stack and expand your distribution footprint. Fixed scope, fixed price.
Your enterprise prospects ask for an API before they'll commit. Your customers are manually copying data between your product and their other tools. A public API with documentation that developers want to use solves both problems.
SaaS products that don't offer a public API have a distribution ceiling. Enterprise buyers evaluate integration capabilities before they sign a contract — if your product doesn't integrate with their CRM, their HRIS, or their data warehouse, the deal is lost regardless of how good the core product is. Mid-market buyers who adopt your product and want to automate workflows between your product and their other tools will find a competitor that offers an API and switch.
Building a public API is a product investment with compounding returns: every Zapier zap, every native integration that a customer builds, and every ecosystem partner that builds on your API extends your product's reach into use cases and buyer segments you didn't design for. The SaaS products that become platforms — the ones with network effects and switching costs that compound over time — almost always got there through a developer ecosystem built on their API.
The developer experience of the API matters as much as the functionality. An API with clear authentication, predictable error responses, comprehensive documentation, and a webhook system that reliably delivers events is an API that developers will use and recommend. An API that was bolted on as an afterthought — inconsistent response structures, no versioning strategy, no webhook delivery confirmation — creates support tickets, not enthusiastic integrators.
A production-ready public API with authentication, versioning, rate limiting, webhook delivery, and documentation — the developer experience that lets your customers integrate your product and your ecosystem partners build on it.
RESTful public API with resource coverage
API endpoints covering your product's core resources — the objects and actions that your customers need to automate workflows and build integrations. Consistent response structure. Proper HTTP status codes. Pagination for collection endpoints. Filtering and sorting where relevant.
API key authentication and management
API key issuance in the customer dashboard. Scoped keys (read-only, read-write, resource-specific). Key rotation and revocation. Usage tracking per key. Rate limiting enforced per key with appropriate error responses and retry-after headers.
Webhook delivery system
Event subscription management in the customer dashboard. Reliable webhook delivery with retry logic (exponential backoff, up to 72 hours of retry). Delivery log with response status and payload visible to the customer. HMAC signature for webhook payload verification.
API versioning strategy
Versioned API endpoints (v1, v2) with deprecation policy. Version header support. Breaking change management process documented.
Developer documentation
OpenAPI 3.0 spec generated from code. Documentation site (ReadMe, Mintlify, or custom) with authentication guide, endpoint reference, request/response examples, code snippets in JavaScript, Python, and cURL, and changelog. Built on Next.js API routes, Postgres, and OpenAPI spec generation.
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
A production-ready public API with authentication, versioning, rate limiting, webhook delivery, and documentation — the developer experience that lets your customers integrate your product and your ecosystem partners build on it.
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Enterprise sales cycles have API integration on the diligence checklist. If your sales team is losing deals because the product doesn't have a documented API, the investment has a calculable return: the deals you stop losing. Fixed scope and fixed price is how you make that investment decision with budget certainty.
Related engagements.
Questions, answered.
REST is the right choice for most SaaS public APIs — it's the standard that integrators expect, the standard that Zapier and Make support natively, and the standard that requires the least documentation overhead. GraphQL is the right choice if your data model is deeply nested and your customers have genuinely heterogeneous query patterns. For most SaaS products, REST with thoughtful resource design is better than GraphQL.
The versioning strategy addresses this: breaking changes are introduced in v2 while v1 continues operating with a defined deprecation timeline (typically 12 months). We include the deprecation policy and communication process in the API documentation from launch.
The webhook system uses a persistent delivery queue with retry logic — events are not lost if the customer's endpoint is temporarily unavailable. Delivery is retried on exponential backoff for up to 72 hours. Events not delivered within 72 hours are logged as failed and visible in the customer dashboard.
Public API, API key management, webhook delivery system, versioning, and documentation typically runs $30k–$60k. Number of resources and complexity of data relationships are the main variables. Fixed-price.
10 to 14 weeks for a production public API with documentation and webhook system live.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.