What can be included
- API authentication and keys
- Payment creation and status updates
- Webhook processing
- Refund, error and logging logic
API and system connectivity
Payment API integration
We connect a payment provider to an online store or internal system when a standard plugin is not enough.
from €500
Get an estimate →
When this is useful
Useful for custom Paysera, Montonio, Stripe, MakeCommerce or other payment-provider integrations.
The price shown is a starting point. Before work begins, we confirm the data source, required result and exact scope.
How this solution works in practice
An API integration is useful when two or more systems need to exchange data without manual intervention. Sending a request is only one part of the job – authentication, field mapping, retries, error scenarios and record matching must also be handled.
Payment API integration. We connect a payment provider to an online store or internal system when a standard plugin is not enough. The implementation is adapted to the systems and data already used by your company instead of forcing a generic workflow.
Typical integrations use REST APIs, JSON, OAuth 2.0, API keys and webhooks. If a platform does not provide a practical API, we can evaluate safe alternatives such as file exchange, database access or intermediary processes.
The practical scope can include: API authentication and keys, Payment creation and status updates, Webhook processing, Refund, error and logging logic. We agree which of these parts are actually required before development starts.
REST API
JSON
OAuth
Webhook
Token
ERP
CRM
From task to production
How the work is delivered
Even a small integration should be implemented as a controlled production process: understand the source, define the rules, test failures and only then launch it.
1. Review the source
We check the API, file, database, device or existing process and identify the exact data available.
2. Define the flow
We agree what should be received, transformed, validated and where the result should be written.
3. Build and test
We implement the integration or automation and test normal cases as well as duplicate and error scenarios.
4. Launch and verify
We deploy the solution, verify the first real runs and make sure logs and control points are understandable.
Common questions
Before starting the integration
How much does Payment API integration cost?
The starting price is from €500. The exact estimate depends on the source system, access method, data volume, required logic and testing scope.
Can this be connected to an existing system?
Usually yes, if the existing platform provides a usable API, file exchange, database access or another technically safe integration method. We confirm the available option before development starts.
Can the process run automatically?
Yes. Depending on the source, the process can run on a schedule, react to a webhook or event, or update in near real time. The appropriate method depends on the capabilities of the connected systems.
How are errors and failed runs handled?
Where relevant, we include logs, validation and clear failure handling so a broken import or integration does not fail silently. The exact monitoring level is agreed as part of the scope.
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Webhook and real-time integration
We build webhook receiving and processing so systems react to events immediately instead of waiting for scheduled jobs.
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OAuth / SSO login integration
We integrate secure OAuth or SSO login and handle tokens, sessions and user mapping.
from €600
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