Additional optional APIs

Optionally, IPSOs, PSPs and FXPs may use the following APIs to update the reference data. As these updates may be infrequent, Participants may opt to use the Nexus Service Desk instead. The detailed specifications of these APIs will be included in a later stage.

API	Type	Used when	Used by	M/RC/O	Availability
countries	PUT	Updating country specific data, such as: - Value limit - Mandatory message elements	IPSO	Optional	Via Nexus Service Desk and as API at launch
countries	PUT	Adding new address types, updating the input parameters of existing address types	PDO via IPSO	Optional	Via Nexus Service Desk and as API at launch
countries	PUT	Updating available currencies for an IPSO	IPSO	Optional	Via Nexus Service Desk only, API not available at launch
fee-formulas	PUT	Updating country specific D-PSP fee	IPSO	Optional	Via Nexus Service Desk only, API not available at launch
fin-insts	POST/PUT	Adding/updating a Financial Institution	IPSO	Recommended	Via Nexus Service Desk and as API at launch
rates	POST	Add/update a live FX rate	FXP	Mandatory	Only via API
relationships	POST/PUT	Add/update the FXP-PSP relationship, including PSP-based improvements	FXP	Optional	Via Nexus Service Desk only, API not available at launch
tiers	POST/PUT/DELETE	Create/Update/Delete a tier for a given FXP and source currency	FXP	Recommended	Via Nexus Service Desk and as API at launch