diff --git a/README.md b/README.md
index aa482e5..9e8a1f0 100644
--- a/README.md
+++ b/README.md
@@ -62,6 +62,8 @@ It returns a boolean that is `true` when the server is a demo.
   - [x] parser: able to get/build attachment's URL
 - [x] Find Pronote instances with longitude and latitude
   - [x] `findPronoteInstances(fetcher, { longitude, latitude })`
+- [x] Get information about an instance from its URL
+  - [x] `getPronoteInstanceInformation(fetcher, { pronoteURL })`
 - [x] Periods
   - [x] client: `.periods` (property)
   - [x] parser: `Period`
diff --git a/examples/instance-information.ts b/examples/instance-information.ts
new file mode 100644
index 0000000..8f1d756
--- /dev/null
+++ b/examples/instance-information.ts
@@ -0,0 +1,22 @@
+import { getPronoteInstanceInformation, defaultPawnoteFetcher } from "../src";
+
+(async () => {
+  const instance = await getPronoteInstanceInformation(defaultPawnoteFetcher, {
+    pronoteURL: "https://demo.index-education.net/pronote"
+  });
+
+  console.log("Root URL:", instance.pronoteRootURL);
+  console.log("School Name:", instance.schoolName);
+  console.log("Server Version:", instance.version);
+  
+  console.group("Available account types:", instance.accounts.length);
+  instance.accounts.forEach(account => {
+    console.log("->", account.name, `(${account.id})`);
+  })
+  console.groupEnd();
+
+  if (instance.entURL) {
+    console.log("ENT is activated, base URL is", instance.entURL);
+    console.log("-> ENT token:", instance.entToken!);
+  }
+})();
diff --git a/src/api/geolocation/index.ts b/src/api/geolocation/index.ts
index df5c591..26a5d48 100644
--- a/src/api/geolocation/index.ts
+++ b/src/api/geolocation/index.ts
@@ -27,7 +27,7 @@ export const callApiGeolocation = makeApiHandler<ApiGeolocation>(async (fetcher,
     body: searchParamsBody.toString()
   });
 
-  let data = await response.json() as PronoteApiGeolocation["response"];
+  let data = await response.json<PronoteApiGeolocation["response"]>();
   data = Array.isArray(data) ? data : [];
 
   // Restructure the results to be more readable.
diff --git a/src/api/index.ts b/src/api/index.ts
index 4b32b6a..e8f8e99 100644
--- a/src/api/index.ts
+++ b/src/api/index.ts
@@ -6,6 +6,7 @@ export { callApiUserHomework } from "./user/homework";
 export { callApiUserHomeworkStatus } from "./user/homeworkStatus";
 export { callApiUserTimetable } from "./user/timetable";
 export { callApiGeolocation } from "./geolocation";
+export { callApiInstance } from "./instance";
 
 export type { ApiLoginInformations, PronoteApiLoginInformations } from "./login/informations/types";
 export type { ApiLoginIdentify, PronoteApiLoginIdentify } from "./login/identify/types";
@@ -15,3 +16,4 @@ export type { ApiUserHomework, PronoteApiUserHomework } from "./user/homework/ty
 export type { ApiUserHomeworkStatus, PronoteApiUserHomeworkStatus } from "./user/homeworkStatus/types";
 export type { ApiUserTimetable, PronoteApiUserTimetable } from "./user/timetable/types";
 export type { ApiGeolocation, PronoteApiGeolocation } from "./geolocation/types";
+export type { ApiInstance, PronoteApiInstance } from "./instance/types";
diff --git a/src/api/instance/index.ts b/src/api/instance/index.ts
new file mode 100644
index 0000000..c6220f7
--- /dev/null
+++ b/src/api/instance/index.ts
@@ -0,0 +1,50 @@
+import { makeApiHandler } from "~/utils/api";
+import type { PronoteApiInstance, ApiInstance } from "./types";
+import { cleanPronoteUrl } from "~/pronote/url";
+import { PRONOTE_ACCOUNT_TYPES, PronoteApiAccountType } from "~/constants/accounts";
+import { PRONOTE_INSTANCE_MOBILE_INFOS_PATH } from "~/constants/urls";
+
+/**
+ * Filter function to prevent TS issues.
+ * Allows to check that every item is defined and make them typed to `PronoteApiAccountType`.
+ */
+const isPronoteApiAccountType = (item: PronoteApiAccountType | undefined): item is PronoteApiAccountType => {
+  return Boolean(item);
+};
+
+/**
+ * Takes an instance URL and return informations about it such as...
+ * - available account types ;
+ * - instance name ;
+ * - base URL and potential ENT URL
+ */
+export const callApiInstance = makeApiHandler<ApiInstance>(async (fetcher, input) => {
+  const pronoteURL = cleanPronoteUrl(input.pronoteURL);
+  const informationURL = `${pronoteURL}/${PRONOTE_INSTANCE_MOBILE_INFOS_PATH}`;
+
+  const response = await fetcher(informationURL, {
+    method: "GET"
+  });
+
+  // Build the local date to get the timezone offset, right after.
+  // const local_date = new Date(new Date().toLocaleString("fr-FR", { timeZone: req.body.timezone }));
+
+  const data = await response.json<PronoteApiInstance["response"]>();
+
+  // Calculate the timezone offset between the server and the client.
+  // const timezone_offset = local_date.getTime() - new Date(data.date).getTime();
+
+  // Filter the accounts to only keep the ones that are supported.
+  const accounts = data.espaces.map((account) => PRONOTE_ACCOUNT_TYPES.find(
+    (account_type) => account_type.path === account.URL
+  )).filter(isPronoteApiAccountType);
+
+  return {
+    accounts,
+    pronoteRootURL: pronoteURL,
+    version: data.version[0],
+    schoolName: data.nomEtab,
+    entURL: data.CAS.actif ? data.CAS.casURL : undefined,
+    entToken: data.CAS.actif ? data.CAS.jetonCAS : undefined
+  };
+});
diff --git a/src/api/instance/types.ts b/src/api/instance/types.ts
new file mode 100644
index 0000000..a3bf025
--- /dev/null
+++ b/src/api/instance/types.ts
@@ -0,0 +1,36 @@
+import { PronoteApiAccountId } from "~/constants/accounts";
+
+export interface PronoteApiInstance {
+  request: Record<string, never>
+
+  response: {
+    version: number[]
+    date: string
+    CAS: { actif: false } | { actif: true, casURL: string, jetonCAS: string }
+    espaces: Array<{ nom: string, URL: string }>
+    nomEtab: string
+  }
+}
+
+export interface ApiInstance {
+  input: {
+    pronoteURL: string
+  }
+
+  output: {
+    version: number;
+    schoolName: string;
+
+    accounts: Array<{
+      name: string
+      id: PronoteApiAccountId
+    }>
+
+    pronoteRootURL: string
+
+    /** URL of the ENT we have to handle. */
+    entURL?: string
+    /** Used to generate new temporary passwords for Pronote after ENT login. */
+    entToken?: string
+  }
+}
diff --git a/src/index.ts b/src/index.ts
index 07810a4..3d9e445 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -3,8 +3,8 @@ export { PronoteApiAccountId } from "~/constants/accounts";
 export { authenticatePronoteCredentials, authenticateToken, authenticatePronoteQRCode } from "~/authenticate";
 export { PronoteApiGradeType } from "./pronote/grades";
 
-// Geolocation.
-export { callApiGeolocation as findPronoteInstances } from "~/api";
+export { callApiGeolocation as findPronoteInstances, callApiInstance as getPronoteInstanceInformation } from "~/api";
+
 import type { ApiGeolocation } from "~/api";
 
 /**