Lapasar
Technology & Integration

cXML

Also known as: Commerce XML

cXML (Commerce XML) is a widely used standard for exchanging procurement documents such as PunchOut sessions, purchase orders and invoices between systems.

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cXML defines the message formats that let a buyer's e-procurement system and a supplier's catalogue talk to each other — setting up a PunchOut session, returning a shopping cart, sending a purchase order and receiving an invoice. It is the most common protocol behind PunchOut integrations.

Because cXML is broadly supported by major procurement platforms, it lets a supplier connect to many buyers using one standard integration rather than a bespoke one per customer. It underpins Level 1 and Level 2 PunchOut, where Level 2 allows deeper catalogue navigation.

Frequently asked questions

What is cXML?
cXML (Commerce XML) is a standard set of message formats for exchanging procurement documents — PunchOut sessions, purchase orders and invoices — between buyer and supplier systems.
What is cXML used for?
It is most commonly used to power PunchOut catalogues and to transmit purchase orders and invoices electronically between e-procurement systems and suppliers.

Go deeper

PunchOut guide: cXML & OCI

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Operating model · diagram

  1. 01

    AI-first software

    AI-first procurement software for long-tail spend

  2. 02

    Live marketplace

    A live B2B marketplace

  3. 03

    Human services

    Human sourcing and support

  4. 04

    Optional add-on

    Fulfilment support for merchants