External Host Interface (EHI) Guides

The EHI guides describe the Thredd External Host Interface (EHI) and provides technical specifications on how to integrate your systems to EHI. We provide several flavours of the EHI Guide, depending on the type of EHI integration:

• EHI Guide (XML version) — for clients integrating using the XML message format.

• EHI Guide (JSON version ) — for clients integrating using the JSON message format.

• EHI Guide for Single Message System (SMS version) — for clients processing transactions via Mastercard Network Exchange (MNE) for US debit card processing using the JSON message format.

You should read one of the above guides if you are using EHI for payment transaction authorisation and/or subscription to the EHI real-time payment transaction data feed.