Hi ​@silvR 

You can use the “Update the Router for an Event Orchestration” endpoint to delete a rule. It requires some munging of the ruleset, so I’m not sure it will be great for what you’re trying to do. 

You can see from the request sample on the docs page that this endpoint will receive a PUT request that contains the full ruleset you want to apply to the orchestration. If you leave out a rule, that rule will effectively be deleted from your set. The “start” set is treated like a single object.

I brute-forced through it in an example here. Basically what I’m doing is:

• requesting the event orchestration (I only have one on this account, so ymmv) 
• getting the ID of the orchestration I want to change rules on because I need it for the next request endpoint
• requesting the router data (the rules) 
• looping through the rules and
• skipping the one i want to delete while preserving the other rules

Then I rebuild the json with the new ruleset and push it back up to the API.

Not especially pretty but might give you some ideas. 

HTH,

--mandi