Links-and-resources.md

@@ -58,3 +58,6 @@ with [Swagger JSON](https://raw.githubusercontent.com/OpenBankingUK/read-write-a
 
 [ISO2022 - Nordea message flow ](https://www.nordea.com/Images/37-179816/CAP_Appendix%20User%20guide_Message%20flow_01APR17.pdf)
 - Good diagrams to illustrate how those messages are used.
+
+[Java API for ISO20022](https://tools20022.com/apidocs/overview-summary.html)
+Set of classes with ISO 20022 messages' definitions.
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