C3

C3API and C3Agent are interfaces enabling a Point of Sale (POS / ECR) application to interact with Worldline / Ingenico payment terminals through the C3Net protocol.

C3Agent is a high-level SDK integrated on the POS side (Java, C#, Kotlin, Swift, websocket JSON), which abstracts low-level terminal communication and orchestrates:

• payment transactions,
• user interactions (display, input, confirmation),
• error handling, logging, and recovery mechanisms.

C3Agent SDK C#

C3Agent SDK Java

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