diff --git a/package.json b/package.json
index 37d4d72a4..2229124c4 100644
--- a/package.json
+++ b/package.json
@@ -125,7 +125,8 @@
     "vite-plugin-html": "3.2.2",
     "vite-plugin-node-polyfills": "0.22.0",
     "vite-tsconfig-paths": "4.3.2",
-    "vitest": "1.6.0"
+    "vitest": "1.6.0",
+    "vitest-fetch-mock": "0.2.2"
   },
   "npmpackagejsonlint": {
     "rules": {
diff --git a/src/global.d.ts b/src/global.d.ts
new file mode 100644
index 000000000..de0dd38e1
--- /dev/null
+++ b/src/global.d.ts
@@ -0,0 +1 @@
+import "vitest-fetch-mock";
diff --git a/src/juju/jimm/api.ts b/src/juju/jimm/api.ts
new file mode 100644
index 000000000..7706997f0
--- /dev/null
+++ b/src/juju/jimm/api.ts
@@ -0,0 +1,5 @@
+export const endpoints = {
+  login: "/auth/login",
+  logout: "/auth/logout",
+  whoami: "/auth/whoami",
+};
diff --git a/src/juju/jimm/thunks.test.ts b/src/juju/jimm/thunks.test.ts
new file mode 100644
index 000000000..54a69ae14
--- /dev/null
+++ b/src/juju/jimm/thunks.test.ts
@@ -0,0 +1,67 @@
+import { unwrapResult } from "@reduxjs/toolkit";
+import { vi } from "vitest";
+
+import { endpoints } from "./api";
+import { logout, whoami } from "./thunks";
+
+describe("thunks", () => {
+  beforeEach(() => {
+    fetchMock.resetMocks();
+  });
+
+  it("logout", async () => {
+    const action = logout();
+    await action(vi.fn(), vi.fn(), null);
+    expect(global.fetch).toHaveBeenCalledWith(endpoints.logout);
+  });
+
+  it("logout handles unsuccessful requests", async () => {
+    fetchMock.mockResponseOnce(JSON.stringify({}), { status: 500 });
+    const action = logout();
+    const response = await action(vi.fn(), vi.fn(), null);
+    expect("error" in response ? response.error.message : null).toBe(
+      "Unable to log out: non-success response",
+    );
+  });
+
+  it("logout handles errors", async () => {
+    fetchMock.mockRejectedValue("404");
+    const action = logout();
+    const response = await action(vi.fn(), vi.fn(), null);
+    expect("error" in response ? response.error.message : null).toBe(
+      "Unable to log out: 404",
+    );
+  });
+
+  it("whoami returns a user", async () => {
+    const action = whoami();
+    await action(vi.fn(), vi.fn(), null);
+    expect(global.fetch).toHaveBeenCalledWith(endpoints.whoami);
+  });
+
+  it("whoami handles non-authenticated user", async () => {
+    fetchMock.mockResponseOnce(JSON.stringify({}), { status: 403 });
+    const action = whoami();
+    const response = await action(vi.fn(), vi.fn(), null);
+    expect(global.fetch).toHaveBeenCalledWith(endpoints.whoami);
+    expect(unwrapResult(response)).toBeNull();
+  });
+
+  it("whoami unsuccessful requests", async () => {
+    fetchMock.mockResponse(JSON.stringify({}), { status: 500 });
+    const action = whoami();
+    const response = await action(vi.fn(), vi.fn(), null);
+    expect("error" in response ? response.error.message : null).toBe(
+      "Unable to get user details: non-success response",
+    );
+  });
+
+  it("whoami handles errors", async () => {
+    fetchMock.mockRejectedValue("404");
+    const action = whoami();
+    const response = await action(vi.fn(), vi.fn(), null);
+    expect("error" in response ? response.error.message : null).toBe(
+      "Unable to get user details: 404",
+    );
+  });
+});
diff --git a/src/juju/jimm/thunks.ts b/src/juju/jimm/thunks.ts
new file mode 100644
index 000000000..9a3b51dfb
--- /dev/null
+++ b/src/juju/jimm/thunks.ts
@@ -0,0 +1,51 @@
+import { createAsyncThunk } from "@reduxjs/toolkit";
+
+import type { RootState } from "store/store";
+import { toErrorString } from "utils";
+
+import { endpoints } from "./api";
+
+/**
+  Log out of the JIMM API.
+*/
+export const logout = createAsyncThunk<
+  void,
+  void,
+  {
+    state: RootState;
+  }
+>("jimm/logout", async () => {
+  try {
+    const response = await fetch(endpoints.logout);
+    if (!response.ok) {
+      throw new Error("non-success response");
+    }
+  } catch (error) {
+    throw new Error(`Unable to log out: ${toErrorString(error)}`);
+  }
+});
+
+/**
+  Get the authenticated user from the JIMM API.
+*/
+export const whoami = createAsyncThunk<
+  void,
+  void,
+  {
+    state: RootState;
+  }
+>("jimm/whoami", async () => {
+  try {
+    const response = await fetch(endpoints.whoami);
+    if (response.status === 403) {
+      // The user is not authenticated so return null instead of throwing an error.
+      return null;
+    }
+    if (!response.ok) {
+      throw new Error("non-success response");
+    }
+    return await response.json();
+  } catch (error) {
+    throw new Error(`Unable to get user details: ${toErrorString(error)}`);
+  }
+});
diff --git a/src/store/middleware/check-auth.ts b/src/store/middleware/check-auth.ts
index 69cbdb2de..a2fc8f948 100644
--- a/src/store/middleware/check-auth.ts
+++ b/src/store/middleware/check-auth.ts
@@ -5,6 +5,7 @@
 
 import { isAction, type Middleware } from "redux";
 
+import * as jimmThunks from "juju/jimm/thunks";
 import { actions as appActions, thunks as appThunks } from "store/app";
 import { actions as generalActions } from "store/general";
 import { isLoggedIn } from "store/general/selectors";
@@ -99,6 +100,12 @@ export const checkAuthMiddleware: Middleware<
       addControllerCloudRegion.fulfilled.type,
       addControllerCloudRegion.pending.type,
       addControllerCloudRegion.rejected.type,
+      jimmThunks.logout.fulfilled.type,
+      jimmThunks.logout.pending.type,
+      jimmThunks.logout.rejected.type,
+      jimmThunks.whoami.fulfilled.type,
+      jimmThunks.whoami.pending.type,
+      jimmThunks.whoami.rejected.type,
     ];
 
     const state = getState();
diff --git a/src/testing/setup.ts b/src/testing/setup.ts
index de89074e6..5f763849e 100644
--- a/src/testing/setup.ts
+++ b/src/testing/setup.ts
@@ -1,9 +1,14 @@
 import "@testing-library/jest-dom/vitest";
 import type { Window as HappyDOMWindow } from "happy-dom";
 import { vi } from "vitest";
+import createFetchMock from "vitest-fetch-mock";
 
 vi.mock("react-ga");
 
+const fetchMocker = createFetchMock(vi);
+// sets globalThis.fetch and globalThis.fetchMock to our mocked version
+fetchMocker.enableMocks();
+
 declare global {
   interface Window extends HappyDOMWindow {}
   // eslint-disable-next-line no-var
diff --git a/yarn.lock b/yarn.lock
index 8b8bf55c6..8ad080e4d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3807,6 +3807,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"cross-fetch@npm:^3.0.6":
+  version: 3.1.8
+  resolution: "cross-fetch@npm:3.1.8"
+  dependencies:
+    node-fetch: "npm:^2.6.12"
+  checksum: 10c0/4c5e022ffe6abdf380faa6e2373c0c4ed7ef75e105c95c972b6f627c3f083170b6886f19fb488a7fa93971f4f69dcc890f122b0d97f0bf5f41ca1d9a8f58c8af
+  languageName: node
+  linkType: hard
+
 "cross-spawn@npm:^7.0.0, cross-spawn@npm:^7.0.2, cross-spawn@npm:^7.0.3":
   version: 7.0.3
   resolution: "cross-spawn@npm:7.0.3"
@@ -7582,6 +7591,7 @@ __metadata:
     vite-plugin-node-polyfills: "npm:0.22.0"
     vite-tsconfig-paths: "npm:4.3.2"
     vitest: "npm:1.6.0"
+    vitest-fetch-mock: "npm:0.2.2"
     yup: "npm:1.4.0"
   languageName: unknown
   linkType: soft
@@ -8271,6 +8281,20 @@ __metadata:
   languageName: node
   linkType: hard
 
+"node-fetch@npm:^2.6.12":
+  version: 2.7.0
+  resolution: "node-fetch@npm:2.7.0"
+  dependencies:
+    whatwg-url: "npm:^5.0.0"
+  peerDependencies:
+    encoding: ^0.1.0
+  peerDependenciesMeta:
+    encoding:
+      optional: true
+  checksum: 10c0/b55786b6028208e6fbe594ccccc213cab67a72899c9234eb59dba51062a299ea853210fcf526998eaa2867b0963ad72338824450905679ff0fa304b8c5093ae8
+  languageName: node
+  linkType: hard
+
 "node-gyp-build@npm:^4.3.0":
   version: 4.6.0
   resolution: "node-gyp-build@npm:4.6.0"
@@ -10935,6 +10959,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"tr46@npm:~0.0.3":
+  version: 0.0.3
+  resolution: "tr46@npm:0.0.3"
+  checksum: 10c0/047cb209a6b60c742f05c9d3ace8fa510bff609995c129a37ace03476a9b12db4dbf975e74600830ef0796e18882b2381fb5fb1f6b4f96b832c374de3ab91a11
+  languageName: node
+  linkType: hard
+
 "trim-newlines@npm:^3.0.0":
   version: 3.0.1
   resolution: "trim-newlines@npm:3.0.1"
@@ -11549,6 +11580,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"vitest-fetch-mock@npm:0.2.2":
+  version: 0.2.2
+  resolution: "vitest-fetch-mock@npm:0.2.2"
+  dependencies:
+    cross-fetch: "npm:^3.0.6"
+  peerDependencies:
+    vitest: ">=0.16.0"
+  checksum: 10c0/5c011274089301e2c21e794e79de6af2ad2884c1bf5784f79f11a06f93b8dc0284f007645ab145708bab86c810356eaafaf9de31fe9746f9084dcf28c20f85e9
+  languageName: node
+  linkType: hard
+
 "vitest@npm:1.6.0":
   version: 1.6.0
   resolution: "vitest@npm:1.6.0"
@@ -11615,6 +11657,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"webidl-conversions@npm:^3.0.0":
+  version: 3.0.1
+  resolution: "webidl-conversions@npm:3.0.1"
+  checksum: 10c0/5612d5f3e54760a797052eb4927f0ddc01383550f542ccd33d5238cfd65aeed392a45ad38364970d0a0f4fea32e1f4d231b3d8dac4a3bdd385e5cf802ae097db
+  languageName: node
+  linkType: hard
+
 "webidl-conversions@npm:^7.0.0":
   version: 7.0.0
   resolution: "webidl-conversions@npm:7.0.0"
@@ -11662,6 +11711,16 @@ __metadata:
   languageName: node
   linkType: hard
 
+"whatwg-url@npm:^5.0.0":
+  version: 5.0.0
+  resolution: "whatwg-url@npm:5.0.0"
+  dependencies:
+    tr46: "npm:~0.0.3"
+    webidl-conversions: "npm:^3.0.0"
+  checksum: 10c0/1588bed84d10b72d5eec1d0faa0722ba1962f1821e7539c535558fb5398d223b0c50d8acab950b8c488b4ba69043fd833cc2697056b167d8ad46fac3995a55d5
+  languageName: node
+  linkType: hard
+
 "which-boxed-primitive@npm:^1.0.2":
   version: 1.0.2
   resolution: "which-boxed-primitive@npm:1.0.2"