API & Integrations.

Your tools should talk to each other. We design, build, and maintain the invisible connective tissue that makes complex businesses run — REST APIs, GraphQL, webhooks, ETL pipelines, and everything between your stack and the world.

What's Included

Everything we deliver.

From a single webhook handler to a full event-driven microservices mesh — integration work that's documented, tested, and built to last.

🔗

Third-Party API Integration

We connect your product to the APIs your business depends on — payment gateways, CRMs, logistics, email platforms — with clean, maintainable code and proper error handling.

🗺️

API Mapping & Data Transformation

Bridging different data models between services — field mapping, format conversion, and payload normalization so data flows correctly end to end.

🧩

Webhook & Event Handling

Receiving and processing real-time events from external APIs — Stripe, GitHub, HubSpot and more — with idempotent handlers that never process the same event twice.

🛡️

Auth & Credential Management

Handling OAuth 2.0 flows, API key rotation, token refresh logic, and scoped permission models — so every third-party connection stays secure and up to date.

📊

Monitoring & Error Alerting

Every integration we set up ships with health checks, latency tracking, and error-rate alerts — so you know before your users do when an upstream API misbehaves.

🔬

Integration Testing & Sandboxing

We validate every integration against sandbox environments before going live — covering edge cases, error states, and payload variations your users will eventually trigger.

Como Construímos

Our Integration Process.

// 01
Systems Audit & Mapping
We learn your stack before we touch it. Every API, credential, and data flow gets documented upfront.
// 02
Contract Design
We agree on payloads, error handling, and field mapping before writing a line of code.
// 03
Build & Sandbox Testing
We wire it up in staging and try to break it before it ever sees production.
// 04
Staged Production Rollout
We go live in phases — monitoring closely and only expanding once stability is confirmed.
// Phase 01 - Audit
Systems Audit & Mapping

Before connecting a single endpoint, we audit every API and third-party service already in your stack — so there are no surprises mid-integration.

  • Inventory of all existing APIs and services in use
  • Data flow diagram — source to destination
  • Auth & credential assessment (keys, tokens, expiry)
  • Rate limits, quotas, and constraints per service
// Phase 02 - Design
Contract Design

We define exactly how each API will be called, what the payloads look like, and how failures are handled — across every touchpoint. This contract guides the entire build.

  • Request / response schema per integration point
  • Error strategy — retries, fallbacks, dead-letter queues
  • Field mapping between source and destination models
  • Agreed behaviour for edge cases and timeouts
// Phase 03 - Build
Build & Sandbox Testing

Integration is built against sandbox environments and tested through real-world scenarios. Every edge case from the contract gets covered before we go anywhere near production.

  • Built and validated against sandbox / staging APIs
  • End-to-end testing across the full data flow
  • Simulated failures — timeouts, bad responses, auth expiry
  • Postman collections or test scripts included on delivery
// Phase 04 - Go Live
Staged Production Rollout

Production rollout happens in stages — starting with low-risk traffic, watching error rates and latency, and expanding only after the integration proves stable under real load.

  • Phased rollout starting with a traffic subset
  • Live monitoring of errors, latency, and payload integrity
  • Rollback plan ready before go-live
  • Full cutover only after stability is confirmed
Why FrownWorks

How we compare to the alternatives.

Most integration work is patched together with duct tape and hope. Here's what makes ours different.

Feature
Typical Developer
✦ FrownWorks
Sandbox validation before go-live
Depends on timeline
Non-negotiable
Auth & token management
× Set once, never revisited
Rotation & expiry handled
Payload validation on receive
Trusted blindly
Validated before processing
Monitoring & error alerting
× Extra scope
Included on every project
Failure & rollback plan
× Figured out after it breaks
Defined before go-live
Ready to Connect?

Tell us what needs to talk.

Describe your systems and what you need them to do together. We'll reply with an honest assessment and a clear plan within 48 hours.