Custom development · API

The custom API integration that connects your systems.

Dollen connects your store, CRM, ERP or catalogue to reduce manual re-entry and make data flows more reliable. Before development, we define the data, business rules and recovery steps for errors.

Technical discoveryAPI & AutomationsFull QADocumentation
Before connectingThree answers are enough to get started.
  1. 01Which systems?
  2. 02Which data?
  3. 03At what point?
Describe the flow↗

Compatibility assessment

A useful answer before a quote.

We do not promise an integration before checking access, API quality and how your teams actually use the data.

Inputs

Systems and access

Website technology, documentation, test accounts, APIs, webhooks and available files.

Rules

Data and decisions

Source of truth, frequency, controls, conflicts, statuses and each system's responsibilities.

Outcome

Recommended approach

Architecture, risks, phases, testing, monitoring and an indicative budget.

DecisionConnect, adapt or stop before wasting budget.Get an initial assessment ↗

Where we start

When the site is isolated, the work is repeated.

A bespoke API integration moves the right data at the right time between your website, software and teams. It replaces duplicate data entry with a controlled, documented and monitored flow.

01

Catalogue

Synchronize products, prices, documents and availability from a reliable source.

02

Orders

Forward purchases, estimates or requests without double entry or manual export.

03

Customer relationship

Link forms, accounts and opportunities to CRM or commercial tool.

04

Business tool

Create a configurator, extranet or interface dedicated to the real process.

What discovery covers

Understand the flow before writing the code.

Discovery turns technical and business constraints into a precise, costed and testable operating specification.

01

System mapping

Systems, actors, exchanged data, frequencies and source of truth are represented above all development.

02

Rules & Responsibilities

Formats, business rules, safety and role of each system are defined without grey area.

03

Errors & Recovery

Quotas, conflicts, unavailability, alerts and recovery scenarios are part of the perimeter.

04

Recipe & supervision

The test plan, production, documentation and flow monitoring are planned together.

The process

A reliable connector also provides what can go wrong.

Authentication, quotas, conflicts, takeovers and logging are part of the project from the start.

01

Observe process

We follow the data from its source to its use, with the people concerned.

02

Define contract

Formats, rules, security, errors and responsibilities are written before integration.

03

Develop & Test

Nominal cases and exceptions are checked on separate environments.

04

Supervise

Logs, alerts and recovery procedures make the integration genuinely maintainable.

Dedicated offer

Reflectiv

Want to sell the Reflectiv catalogue? A dedicated page compares a connector for an existing site with a complete e-commerce build.

See the Reflectiv offer↗

View the Reflectiv project↗

Project budget

€7,500–€25,000 excl. VAT

Indicative range after discovery. The final price depends on the systems, rules, volumes, tests and expected availability levels.

FAQ connectors

Before connecting anything.

What is a bespoke API integration?+

It is an integration built around your business rules to synchronise a website, CRM, ERP, PIM or other software. Data, triggers, checks and recovery procedures are tailored to your operations.

How much does a custom API integration cost?+

Technical scoping starts at €1,200 excl. VAT. Dollen projects generally range from €7,500 to €25,000 excl. VAT depending on systems, volumes, business rules, testing and monitoring requirements.

What happens if my tool doesn't have an API?+

We study export, import, webhook or other available mechanisms. If there is no reliable path, we indicate it before starting development.

Can you take over an existing connector?+

Yes, after audit of code, access, documentation and known incidents. A recovery is proposed only if the base is maintained.

Who monitors flows after launch?+

A specific maintenance formula can cover alerts, corrections, updates to the API and adjustments to business rules.

Less retrieving. More continuity.

Show us the tools, the data and the friction point. We will map the most reliable path.

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