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Develozy

API build & integration

Connecting your product to the systems it depends on — and building the API when one does not exist.

Overview

Integrations fail in production, not in the happy path. Rate limits, schema changes, partial outages and stale caches are the actual work. We build the integration and the failure handling together, so a third party having a bad day does not take your site down with it.

What you get

  • Third-party integration — payments, CRM, content, media, logistics
  • REST or GraphQL API design and build, versioned and documented
  • Caching, rate-limit handling and retry strategy
  • Webhook handling with idempotency
  • Graceful degradation when an upstream provider fails
  • OpenAPI documentation

What this isn't

  • We do not ship integrations without monitoring on them
  • No credential handling outside your own secret management

The problem

The problem API build & integration solves

An integration demo takes an afternoon. What takes the other three weeks is everything the demo skipped: what happens at the rate limit, when a webhook arrives twice, when the provider changes a field without notice, or when they are down and your checkout is waiting on them. Integrations built for the happy path fail publicly.

How it runs

Four phases, and what you get from each.

2–6 weeks per integration

  1. Map the contract

    Read the provider documentation properly and establish what it does not tell you: real rate limits, actual error shapes, webhook delivery guarantees, and how they version changes.

    Integration spec including failure modes

    2–4 days

  2. Build

    The integration and its failure handling written together — retries with backoff, idempotency on webhooks, and caching sized to the rate limit rather than to hope.

    Working integration with retry and cache layers

    1–4 weeks

  3. Degrade gracefully

    Decide, per feature, what the user sees when the upstream is down: cached data, a queued action, or an honest message. Never a spinner that never resolves.

    Defined degradation behaviour per feature

    2–5 days

  4. Instrument

    Monitoring on the integration itself — error rate, latency and quota headroom — so you find out from a dashboard rather than from a customer.

    Alerts, dashboard, OpenAPI documentation

    2–4 days

Levels

Three builds, not one price.

  • Single integration

    Connecting one third-party service to an existing product.

    • One provider integrated end to end
    • Retry, caching and rate-limit handling
    • Error monitoring on the integration
    • Documentation for your team

  • Multi-system

    Several services that must agree with each other.

    • Everything in Single integration
    • Multiple providers with a shared data layer
    • Webhook handling with idempotency
    • Reconciliation when systems disagree
    • Graceful degradation per feature

  • API product

    Publishing an API that other people build against.

    • Everything in Multi-system
    • REST or GraphQL design, versioned
    • Authentication, scoping and quotas
    • OpenAPI docs and a sandbox
    • Deprecation policy and migration path

Where we've done this

Shipped, not theoretical.

Questions

Asked before, answered here.

Also relevant

Rarely bought alone.

Have a project in mind? Let's get to work.

Our team is here to deliver tailored solutions that drive results. Tell us what you are building and we will come back with a route to it.

Let's talk