diff --git a/.eslintrc.js b/.eslintrc.js
index a34c6390..083c799b 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -44,6 +44,7 @@ module.exports = {
         'lib/**/*.js',
         'bin/*',
         'server/**/*.js',
+        'prember-urls.js',
       ],
       excludedFiles: ['config/deprecation-workflow.js'],
       parserOptions: {
diff --git a/.gitignore b/.gitignore
index 4a8e5ae0..982c7aca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,5 @@ local.log
 /.node_modules.ember-try/
 /bower.json.ember-try
 /package.json.ember-try
+
+/ember-api-docs-data/
diff --git a/app/adapters/application.js b/app/adapters/application.js
index 684c900f..cb338e22 100644
--- a/app/adapters/application.js
+++ b/app/adapters/application.js
@@ -6,7 +6,7 @@ import { pluralize } from 'ember-inflector';
 import { isBlank } from '@ember/utils';
 
 export default class Application extends JSONAPIAdapter {
-  host = ENV.API_HOST;
+  // host = ENV.API_HOST;
   currentProject = '';
   currentProjectVersion = '';
 
@@ -47,7 +47,7 @@ export default class Application extends JSONAPIAdapter {
 
   async findRecord(store, { modelName }, id) {
     let url;
-    let host = this.host;
+    // let host = this.host;
     let projectName = this.currentProject;
 
     if (['namespace', 'class', 'module'].indexOf(modelName) > -1) {
@@ -85,7 +85,7 @@ export default class Application extends JSONAPIAdapter {
       throw new Error('Unexpected model lookup');
     }
 
-    url = `${host}/${url}.json`;
+    url = `/${url}.json`;
 
     let response = await fetch(url);
     let json = await response.json();
diff --git a/app/router.js b/app/router.js
index 81350a3b..8edfb5dc 100644
--- a/app/router.js
+++ b/app/router.js
@@ -92,4 +92,39 @@ AppRouter.map(function () {
   this.route('data-module', { path: '/data/modules/:module' });
 });
 
+/*
+404
+ember-cli
+project
+
+/:project/:project_version
+  /classes/:class
+    /methods, /properties, /events
+  /functions/:module (no sub routes)
+  /namespaces/:namespace
+    /methods, /properties, /events
+  /modules/:module
+    /methods, /properties, /events
+
+SUB ROUTES
+
+Instead of https://api.emberjs.com/ember/4.6/classes/Engine/methods/unregister?anchor=unregister
+We can do https://api.emberjs.com/ember/4.6/classes/Engine/methods?anchor=unregister
+
+  /methods/:method
+  /properties/:property
+  /events/:event
+
+OTHER STATES
+private, deprecated, inherited, protected
+inherited is not reflected in URL state but it's checked by default
+
+MAYBE REDIRECTS
+
+/data/modules/:module
+/data/classes/:class
+/modules/:module
+/classes/:class
+*/
+
 export default AppRouter;
diff --git a/app/services/meta-store.js b/app/services/meta-store.js
index 85f1167d..ceabe895 100644
--- a/app/services/meta-store.js
+++ b/app/services/meta-store.js
@@ -22,7 +22,7 @@ export default class MetaStoreService extends Service {
   }
 
   getRevId(project, version, type, id) {
-    let encodedId = encodeURIComponent(id);
+    let encodedId = id;
     return this.projectRevMap[`${project}-${version}`][type][encodedId];
   }
 
diff --git a/ember-cli-build.js b/ember-cli-build.js
index 280943f4..f2703604 100644
--- a/ember-cli-build.js
+++ b/ember-cli-build.js
@@ -4,9 +4,13 @@ const EmberApp = require('ember-cli/lib/broccoli/ember-app');
 const Funnel = require('broccoli-funnel');
 const mergeTrees = require('broccoli-merge-trees');
 const envIsProduction = process.env.EMBER_ENV === 'production';
+const premberUrls = require('./prember-urls');
 
 module.exports = function (defaults) {
   let app = new EmberApp(defaults, {
+    prember: {
+      urls: premberUrls(),
+    },
     fingerprint: {
       extensions: [
         'js',
@@ -63,5 +67,6 @@ module.exports = function (defaults) {
     include: ['mappings.json'],
     destDir: '/assets/',
   });
+
   return mergeTrees([app.toTree(), mappingsTree]);
 };
diff --git a/lib/api-docs-data/index.js b/lib/api-docs-data/index.js
new file mode 100644
index 00000000..ef19f698
--- /dev/null
+++ b/lib/api-docs-data/index.js
@@ -0,0 +1,17 @@
+'use strict';
+
+const Funnel = require('broccoli-funnel');
+
+module.exports = {
+  name: require('./package').name,
+
+  isDevelopingAddon() {
+    return true;
+  },
+
+  treeForPublic() {
+    return new Funnel('ember-api-docs-data', {
+      include: ['**/json-docs/**', '**/rev-index/**'],
+    });
+  },
+};
diff --git a/lib/api-docs-data/package.json b/lib/api-docs-data/package.json
new file mode 100644
index 00000000..9b312d9f
--- /dev/null
+++ b/lib/api-docs-data/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "api-docs-data",
+  "keywords": [
+    "ember-addon"
+  ],
+  "peerDependencies": {
+    "broccoli-funnel": "*"
+  }
+}
diff --git a/package-lock.json b/package-lock.json
index 74df2866..794972d1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -108,6 +108,7 @@
         "minimist": "^1.2.6",
         "normalize.css": "^8.0.1",
         "npm-run-all": "^4.1.5",
+        "prember": "^1.1.1",
         "prettier": "^2.2.1",
         "qunit": "^2.16.0",
         "qunit-dom": "^1.6.0",
@@ -11859,6 +11860,12 @@
       "integrity": "sha512-bd2L678uiWATM6m5Z1VzNCErI3jiGzt6HGY8OVICs40JQq/HALfbyNJmp0UDakEY4pMMaN0Ly5om/B1VI/+xfQ==",
       "dev": true
     },
+    "node_modules/denodeify": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/denodeify/-/denodeify-1.2.1.tgz",
+      "integrity": "sha512-KNTihKNmQENUZeKu5fzfpzRqR5S2VMp4gl9RFHiWzj9DfvYQPMJ6XHKNaQxaGCXwPk6y9yme3aUoaiAe+KX+vg==",
+      "dev": true
+    },
     "node_modules/depd": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
@@ -33117,6 +33124,100 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/prember": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/prember/-/prember-1.1.1.tgz",
+      "integrity": "sha512-7lG4eNDKp0Udh2PCxibxMSkDFhscD0FGNGwASk5wUhHayz0R12AZqMxcbveDEMHI9smhYoymiFEdT5A3W7vIpw==",
+      "dev": true,
+      "dependencies": {
+        "broccoli-debug": "^0.6.3",
+        "broccoli-merge-trees": "^2.0.0",
+        "broccoli-plugin": "^1.3.0",
+        "chalk": "^2.3.0",
+        "denodeify": "^1.2.1",
+        "ember-cli-babel": "^7.26.6",
+        "express": "^4.16.2",
+        "fastboot": "^3.1.2",
+        "mkdirp": "^0.5.1"
+      },
+      "engines": {
+        "node": "12.* || 14.* || >= 16"
+      }
+    },
+    "node_modules/prember/node_modules/ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "dependencies": {
+        "color-convert": "^1.9.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/prember/node_modules/chalk": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+      "dev": true,
+      "dependencies": {
+        "ansi-styles": "^3.2.1",
+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/prember/node_modules/color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+      "dev": true,
+      "dependencies": {
+        "color-name": "1.1.3"
+      }
+    },
+    "node_modules/prember/node_modules/color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
+      "dev": true
+    },
+    "node_modules/prember/node_modules/has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/prember/node_modules/mkdirp": {
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
+      "integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
+      "dev": true,
+      "dependencies": {
+        "minimist": "^1.2.6"
+      },
+      "bin": {
+        "mkdirp": "bin/cmd.js"
+      }
+    },
+    "node_modules/prember/node_modules/supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "dependencies": {
+        "has-flag": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/prettier": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.3.2.tgz",
@@ -48621,6 +48722,12 @@
       "integrity": "sha512-bd2L678uiWATM6m5Z1VzNCErI3jiGzt6HGY8OVICs40JQq/HALfbyNJmp0UDakEY4pMMaN0Ly5om/B1VI/+xfQ==",
       "dev": true
     },
+    "denodeify": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/denodeify/-/denodeify-1.2.1.tgz",
+      "integrity": "sha512-KNTihKNmQENUZeKu5fzfpzRqR5S2VMp4gl9RFHiWzj9DfvYQPMJ6XHKNaQxaGCXwPk6y9yme3aUoaiAe+KX+vg==",
+      "dev": true
+    },
     "depd": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/depd/-/depd-1.1.2.tgz",
@@ -65943,6 +66050,84 @@
       "integrity": "sha512-ESF23V4SKG6lVSGZgYNpbsiaAkdab6ZgOxe52p7+Kid3W3u3bxR4Vfd/o21dmN7jSt0IwgZ4v5MUd26FEtXE9w==",
       "dev": true
     },
+    "prember": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/prember/-/prember-1.1.1.tgz",
+      "integrity": "sha512-7lG4eNDKp0Udh2PCxibxMSkDFhscD0FGNGwASk5wUhHayz0R12AZqMxcbveDEMHI9smhYoymiFEdT5A3W7vIpw==",
+      "dev": true,
+      "requires": {
+        "broccoli-debug": "^0.6.3",
+        "broccoli-merge-trees": "^2.0.0",
+        "broccoli-plugin": "^1.3.0",
+        "chalk": "^2.3.0",
+        "denodeify": "^1.2.1",
+        "ember-cli-babel": "^7.26.6",
+        "express": "^4.16.2",
+        "fastboot": "^3.1.2",
+        "mkdirp": "^0.5.1"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "color-convert": {
+          "version": "1.9.3",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+          "dev": true,
+          "requires": {
+            "color-name": "1.1.3"
+          }
+        },
+        "color-name": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+          "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
+          "dev": true
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
+          "dev": true
+        },
+        "mkdirp": {
+          "version": "0.5.6",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
+          "integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
+          "dev": true,
+          "requires": {
+            "minimist": "^1.2.6"
+          }
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
+      }
+    },
     "prettier": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.3.2.tgz",
diff --git a/package.json b/package.json
index 2806adc7..05e96652 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
     "test": "tests"
   },
   "scripts": {
+    "clone": "rm -rf ember-api-docs-data && git clone --depth 1 https://github.com/ember-learn/ember-api-docs-data.git -b fix-files",
     "build": "ember build --environment=production",
     "lint": "npm-run-all --aggregate-output --continue-on-error --parallel 'lint:!(fix)'",
     "lint:fix": "npm-run-all --aggregate-output --continue-on-error --parallel lint:*:fix",
@@ -125,6 +126,7 @@
     "minimist": "^1.2.6",
     "normalize.css": "^8.0.1",
     "npm-run-all": "^4.1.5",
+    "prember": "^1.1.1",
     "prettier": "^2.2.1",
     "qunit": "^2.16.0",
     "qunit-dom": "^1.6.0",
@@ -154,5 +156,10 @@
   "volta": {
     "node": "14.17.0",
     "npm": "8.19.3"
+  },
+  "ember-addon": {
+    "paths": [
+      "lib/api-docs-data"
+    ]
   }
 }
diff --git a/prember-urls.js b/prember-urls.js
new file mode 100644
index 00000000..54d51242
--- /dev/null
+++ b/prember-urls.js
@@ -0,0 +1,139 @@
+const { readdirSync, readFileSync } = require('fs');
+const cmp = require('semver-compare');
+const semver = require('semver');
+
+function partialUrlEncode(input) {
+  return input.replace('/', '%2F');
+}
+
+module.exports = function () {
+  const projects = readdirSync('ember-api-docs-data/json-docs');
+
+  const urls = [];
+
+  projects.forEach((p) => {
+    // add release for each of the projects
+    urls.push(`/${p}/release`);
+
+    const fullProjectVersions = readdirSync(
+      `ember-api-docs-data/json-docs/${p}`
+    ).filter((v) => v.match(/\d+\.\d+\.\d+/));
+
+    // add landing page for each of the projects versions
+    const projectVersions = fullProjectVersions.map((v) => {
+      let [, major, minor] = v.match(/(\d+)\.(\d+)\.\d+/);
+      return `${major}.${minor}`;
+    }); // uniq
+
+    const uniqueProjectVersions = [...new Set(projectVersions)];
+
+    const oldVersions = [
+      '1.12',
+      '1.13',
+      '2.17',
+      '2.18',
+      '3.4',
+      '3.8',
+      '3.12',
+      '3.16',
+      '3.20',
+      '3.24',
+      '3.27',
+      '3.28',
+    ];
+
+    uniqueProjectVersions.forEach((uniqVersion) => {
+      if (
+        !oldVersions.includes(uniqVersion) &&
+        !semver.gte(`${uniqVersion}.0`, '4.0.0')
+      ) {
+        return;
+      }
+
+      urls.push(`/${p}/${uniqVersion}`);
+
+      const sortedPatchVersions = fullProjectVersions
+        .filter((projectVersion) => {
+          // console.log("comparing", projectVersion, uniqVersion, semver.satisfies(projectVersion, uniqVersion))
+          return semver.satisfies(projectVersion, uniqVersion);
+        })
+        .sort(cmp);
+
+      const highestPatchVersion =
+        sortedPatchVersions[sortedPatchVersions.length - 1];
+
+      const revIndex = require(`${__dirname}/ember-api-docs-data/rev-index/${p}-${highestPatchVersion}.json`);
+
+      ['classes', 'namespaces', 'modules'].forEach((entity) => {
+        // add classes
+        revIndex.data.relationships[entity].data.forEach(({ id }) => {
+          const [, cleanId] = id.match(/^.+-\d+\.\d+\.\d+-(.*)/);
+          urls.push(
+            `/${p}/${uniqVersion}/${entity}/${partialUrlEncode(cleanId)}`
+          );
+
+          // TODO only include sub routes if that entity has stuff in that route i.e. if it's empty don't pre-render it
+          urls.push(
+            `/${p}/${uniqVersion}/${entity}/${partialUrlEncode(
+              cleanId
+            )}/methods`
+          );
+          urls.push(
+            `/${p}/${uniqVersion}/${entity}/${partialUrlEncode(
+              cleanId
+            )}/properties`
+          );
+          urls.push(
+            `/${p}/${uniqVersion}/${entity}/${partialUrlEncode(cleanId)}/events`
+          );
+
+          if (entity === 'modules') {
+            const moduleKey = id;
+
+            const fileName = revIndex.meta.module[moduleKey];
+
+            if (fileName === undefined) {
+              // rare cases when very strange things make it through this far
+              // e.g. ember-3.0.0-ember%0A%0ARemove%20after%203.4%20once%20_ENABLE_RENDER_SUPPORT%20flag%20is%20no%20longer%20needed.
+              // 🤷‍♀️
+              return;
+            }
+
+            const moduleData = require(`${__dirname}/ember-api-docs-data/json-docs/${p}/${highestPatchVersion}/modules/${fileName}.json`);
+
+            const staticFunctions = moduleData.data.attributes.staticfunctions;
+
+            Object.keys(staticFunctions).forEach((k) => {
+              const listOfFunctions = staticFunctions[k];
+
+              listOfFunctions.forEach((func) => {
+                urls.push(
+                  `/${p}/${uniqVersion}/functions/${encodeURIComponent(
+                    func.class
+                  )}/${func.name}`
+                );
+              });
+            });
+          }
+
+          // TODO review that we have got all the URLs that we care about
+
+          // TODO discuss only prembering "supported" versions - maybe last version in a major and supported versions
+          // alternative is to rely on netlify complex build
+        });
+      });
+    });
+  });
+
+  return urls;
+};
+
+// this is useful to debug why a url isn't being prembered
+// DEBUG=prember-urls node prember-urls.js
+if (process.env.DEBUG === 'prember-urls') {
+  let urls = module.exports();
+
+  urls.forEach((url) => console.log(url));
+
+  console.log(`\n${urls.length} total URLs`);
+}