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Get started

New to Worldpay Within

If you're new to Worldpay Within, you can download the SDK in any of these languages and begin testing:

Node.js Python Java .NET Go

An experienced user

If you're familiar with how Worldpay Within works, and have used the SDKs before, you can find out more in our Advanced section:

1. How it works
2. Architecture
3. Internal structure
4. Sample service messaging
5. API Specification

Useful terms

Terms we're using in our SDKs and docs.

Term	Definition
API	Application Programming Interface
Worldpay	Worldpay Online Payment API, https://online.worldpay.com/
HCE	Host Card Emulation
HTE	Host Terminal Emulation
HTTPS	HyperText Transfer Protocol Secure
IoT	Internet of Things
P2PE	Point to Point Encryption
TLS	Transport Layer Security
UUID	Universally Unique Identifier
RPC	Remote Procedure Call