How to get instance name/key via API

Is there a way to get the instance name of a Salesforce organisation (like na41) via the REST API in a reliable way? I’ve looked at existing resources available and they do not seem to expose that. I also considered parsing it out of the instance_url value, but it could vary if the org is using a custom domain.

Answers:

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Method 1

With a little bit of reverse engineering, it seems like we can get the instance key using this REST endpoint:

https://api.status.salesforce.com/v1/instanceAliases/[custom-domain]

As an example, if your Salesforce instance URL is:

• https://ci.my.salesforce.com/

You can get the key at:

• https://api.status.salesforce.com/v1/instanceAliases/ci

In JavaScript:

fetch('https://api.status.salesforce.com/v1/instanceAliases/ci')
    .then((resp) => resp.json())
    .then(function (body) {
        console.log(body.instanceKey);
    })
    .catch(function (err) {
        console.error(err)
    });

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0