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API Development & Integration

REST APIs and connections to payments, CRMs, and the other systems your product depends on.

API Development & Integration

Products rarely stand alone. An API is the contract between your application and everything else: a mobile app, a payment provider, or a system you already run.

REST API development

Documented endpoints, consistent errors, and authentication that does not rely on hidden behaviour.

Third-party API integration

Connections to services you have an account with, using their current documentation.

Payment gateway APIs

Charges, refunds, and webhooks handled on the server, with signatures verified.

CRM integrations

Contacts and activities exchanged with the CRM you already use, on a schedule or in response to an event.

Database integrations

Read and write paths to an existing database, after we understand its constraints.

Secure API architecture

Transport security, least-privilege credentials, and a place to rotate keys without a rewrite.

Key features

A written contract

Each endpoint has a purpose, inputs, and errors.

Idempotent where it matters

Repeating a payment or a webhook does not create a second result by accident.

Logs you can read

Failures name the system and the reason, without exposing secrets.

Versioning

A later change does not silently break an existing client.

Benefits

  • Systems that agree. The website, the app, and the back office share one source of truth.
  • Safer credentials. Keys live in configuration, not in source code that is shared widely.
  • Easier partners. Another team can build against the documented API.

Technologies used

PHPNode.jsRESTMySQLJSON

Our development approach

We list the systems, the data that must move, and the failure cases. The API is documented as it is built. Integrations are tested against sandbox accounts before live credentials are used.

FAQs

Only if the scope says so. Many integrations are private to your applications.
In environment configuration on the server, outside the code repository.
Yes, if that vendor provides an API and you can authorize our access.

Related services

Ready to scope this work?

Share your goals, timeline, and constraints. We will respond by email.

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