Get Circle CI Project envars! Require Node.js 16 + `npm install node-fetch`

all-env-circleci.mjs

import fetch from "node-fetch"; // Node.js 18 just remove line

const CIRCLECI_TOKEN = process.env.CIRCLECI_TOKEN
const ORG_NAME = process.env.ORG_NAME
const fetchProjectList = (orgName = ORG_NAME) => {
    return fetch(`https://circleci.com/api/v2/insights/gh/${orgName}/summary`, {
        headers: { "Circle-Token": `${CIRCLECI_TOKEN}` }
    }).then(res => res.json()).then(json => json.all_projects);
};
const fetchProjectEnv = (orgName, project) => {
    return fetch(`https://circleci.com/api/v2/project/gh/${orgName}/${project}/envvar`, {
        headers: { "Circle-Token": `${CIRCLECI_TOKEN}` }
    }).then(res => res.json());
}
const projectNames = await fetchProjectList();
const projectMap = new Map()
for(const projectName of projectNames){
    const env = await fetchProjectEnv(ORG_NAME, projectName);
    projectMap.set(projectName, env.items);
}

console.log(JSON.stringify(Array.from((projectMap.entries()))))

Ref CircleCI-Archived/api-preview-docs#97
Ref https://circleci.com/docs/api/v2/index.html#operation/listEnvVars
Ref CircleCI security alert: Rotate any secrets stored in CircleCI

$ CIRCLECI_TOKEN=xxx ORG_NAME=your-org node all-env-circleci.mjs 

Note: insights API does not return all projects.
If you need to get all projecs, please copy these from Admin Console.

• xhiroga/circleci-list-credentials: Listing up CircleCI Credentials

Official Tool

• CircleCI-Public/CircleCI-Env-Inspector: A NodeJS tool for discovering all your secrets on CircleCI