Exposing standardized events within an API proxy system

A first computing system comprising:

• at least one processor;
• and
• at least one computer-readable medium encoded with instructions which, when executed by the at least one processor, cause the first computing system to:
• receive user input identifying a plurality of parameters for sending indications of events;
• receive, at a first application programming interface (API) endpoint, a first request for a first operation;
• send, to a second API endpoint, a first API call requesting the first operation;
• in response to sending the first API call, receive a first response to the first API call;
• determine that at least one characteristic of the first request or the first response satisfies a criterion, wherein the criterion corresponds to the plurality of parameters;
• detect a first event based on the first request or the first response satisfying the criterion;
• generate a first indication of the first event;
• receive, from a second computing system, a second request to subscribe to events corresponding to satisfaction of the criterion;
• and
• send, to the second computing system, the first indication based at least in part on the second request,
• wherein the first request is received from a third computing system, and
• wherein the third computing system is separate from the second computing system.

At least one non-transitory computer-readable medium encoded with instructions which, when executed by at least one processor of a first computing system, cause the first computing system to:

• receive user input identifying a plurality of parameters for sending indications of events;
• receive, at a first application programming interface (API) endpoint, a first request for a first operation;
• send, to a second API endpoint, a first API call requesting the first operation;
• in response to sending the first API call, receive a first response to the first API call;
• determine that at least one characteristic of the first request or the first response satisfies a criterion, wherein the criterion corresponds to the plurality of parameters;
• detect a first event based on the first request or the first response satisfying the criterion;
• generate a first indication of the first event;
• receive, from a second computing system, a second request to subscribe to events corresponding to satisfaction of the criterion;
• and
• send, to the second computing system, the first indication based at least in part on the second request,
• wherein the first request is received from a third computing system, and
• wherein the third computing system is separate from the second computing system.