diff --git a/ui/src/Components/Fetcher/index.test.tsx b/ui/src/Components/Fetcher/index.test.tsx
index d0c2fa3a6..d91cd99b8 100644
--- a/ui/src/Components/Fetcher/index.test.tsx
+++ b/ui/src/Components/Fetcher/index.test.tsx
@@ -149,7 +149,7 @@ describe("<Fetcher />", () => {
     const fetchSpy = jest.spyOn(alertStore, "fetchWithThrottle");
     settingsStore.gridConfig.setSortOrder("default");
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "", "", "", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with correct sort arguments when sortOrder=disabled reverseSort=false", () => {
@@ -158,7 +158,7 @@ describe("<Fetcher />", () => {
     settingsStore.gridConfig.setSortOrder("disabled");
     settingsStore.gridConfig.setSortReverse(false);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "disabled", "", "", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "disabled", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with correct sort arguments when sortOrder=disabled reverseSort=true", () => {
@@ -167,7 +167,7 @@ describe("<Fetcher />", () => {
     settingsStore.gridConfig.setSortOrder("disabled");
     settingsStore.gridConfig.setSortReverse(true);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "disabled", "", "", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "disabled", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with correct sort arguments when sortOrder=startsAt reverseSort=false", () => {
@@ -176,7 +176,7 @@ describe("<Fetcher />", () => {
     settingsStore.gridConfig.setSortOrder("startsAt");
     settingsStore.gridConfig.setSortReverse(false);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "startsAt", "", "0", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "startsAt", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with correct sort arguments when sortOrder=startsAt reverseSort=true", () => {
@@ -185,7 +185,7 @@ describe("<Fetcher />", () => {
     settingsStore.gridConfig.setSortOrder("startsAt");
     settingsStore.gridConfig.setSortReverse(true);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "startsAt", "", "1", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "startsAt", "", true, {});
   });
 
   it("calls alertStore.fetchWithThrottle with correct sort arguments when sortOrder=label sortLabel=cluster reverseSort=false", () => {
@@ -200,7 +200,7 @@ describe("<Fetcher />", () => {
       false,
       "label",
       "cluster",
-      "0",
+      false,
       {}
     );
   });
@@ -212,7 +212,7 @@ describe("<Fetcher />", () => {
     settingsStore.gridConfig.setSortLabel("job");
     settingsStore.gridConfig.setSortReverse(true);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "label", "job", "1", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "label", "job", true, {});
   });
 
   it("calls alertStore.fetchWithThrottle with correct sort arguments when sortOrder=label sortLabel=instance reverseSort=null", () => {
@@ -227,7 +227,7 @@ describe("<Fetcher />", () => {
       false,
       "label",
       "instance",
-      "",
+      false,
       {}
     );
   });
@@ -239,7 +239,7 @@ describe("<Fetcher />", () => {
     settingsStore.multiGridConfig.setGridLabel("cluster");
     settingsStore.multiGridConfig.setGridSortReverse(false);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("cluster", false, "", "", "", {});
+    expect(fetchSpy).toHaveBeenCalledWith("cluster", false, "", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with gridLabel=cluster gridSortReverse=true", () => {
@@ -249,7 +249,7 @@ describe("<Fetcher />", () => {
     settingsStore.multiGridConfig.setGridLabel("cluster");
     settingsStore.multiGridConfig.setGridSortReverse(true);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("cluster", true, "", "", "", {});
+    expect(fetchSpy).toHaveBeenCalledWith("cluster", true, "", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with gridLabel= gridSortReverse=true", () => {
@@ -259,7 +259,7 @@ describe("<Fetcher />", () => {
     settingsStore.multiGridConfig.setGridLabel("");
     settingsStore.multiGridConfig.setGridSortReverse(true);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", true, "", "", "", {});
+    expect(fetchSpy).toHaveBeenCalledWith("", true, "", "", false, {});
   });
 
   it("calls alertStore.fetchWithThrottle with limits set", () => {
@@ -271,7 +271,7 @@ describe("<Fetcher />", () => {
     alertStore.ui.setLimit("old", "bar", 10);
     alertStore.ui.setLimit("foo", "bar", 5);
     mount(<Fetcher alertStore={alertStore} settingsStore={settingsStore} />);
-    expect(fetchSpy).toHaveBeenCalledWith("", false, "", "", "", { bar: 5 });
+    expect(fetchSpy).toHaveBeenCalledWith("", false, "", "", false, { bar: 5 });
   });
 
   it("internal timer is null after unmount", () => {
diff --git a/ui/src/Components/Fetcher/index.tsx b/ui/src/Components/Fetcher/index.tsx
index 642c9bc87..21f1cf893 100644
--- a/ui/src/Components/Fetcher/index.tsx
+++ b/ui/src/Components/Fetcher/index.tsx
@@ -175,7 +175,7 @@ const Fetcher: FC<{
       settingsStore.multiGridConfig.config.gridSortReverse,
       sortSettings.sortOrder,
       sortSettings.sortLabel,
-      sortSettings.sortReverse,
+      sortSettings.sortReverse === "1",
       Object.values(alertStore.ui.limits).length > 0
         ? toJS(Object.values(alertStore.ui.limits)[0])
         : {}
diff --git a/ui/src/Models/APITypes.ts b/ui/src/Models/APITypes.ts
index 6577ea4b3..a1a7e0c2f 100644
--- a/ui/src/Models/APITypes.ts
+++ b/ui/src/Models/APITypes.ts
@@ -229,3 +229,13 @@ export interface CountersResponseT {
   total: number;
   counters: APILabelCounterT[];
 }
+
+export interface AlertsRequestT {
+  filters: string[];
+  gridLabel: string;
+  gridLimits: { [key: string]: number };
+  gridSortReverse: boolean;
+  sortOrder: string;
+  sortLabel: string;
+  sortReverse: boolean;
+}
diff --git a/ui/src/Stores/AlertStore.test.ts b/ui/src/Stores/AlertStore.test.ts
index 2d80c72fb..0a7ffbccb 100644
--- a/ui/src/Stores/AlertStore.test.ts
+++ b/ui/src/Stores/AlertStore.test.ts
@@ -545,7 +545,7 @@ describe("AlertStore.fetch", () => {
 
     const store = new AlertStore(["label=value"]);
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
 
     expect(fetchMock.calls()).toHaveLength(1);
@@ -561,7 +561,7 @@ describe("AlertStore.fetch", () => {
 
     const store = new AlertStore([]);
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
 
     expect(fetchMock.calls()).toHaveLength(1);
@@ -580,7 +580,7 @@ describe("AlertStore.fetch", () => {
 
     const store = new AlertStore([]);
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toHaveProperty("error");
 
     expect(fetchMock.calls()).toHaveLength(10);
@@ -600,7 +600,7 @@ describe("AlertStore.fetch", () => {
     });
 
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toHaveProperty("error");
     expect(fetchMock.calls()).toHaveLength(10);
   });
@@ -615,7 +615,7 @@ describe("AlertStore.fetch", () => {
     });
 
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toHaveProperty("error");
     expect(fetchMock.calls()).toHaveLength(10);
 
@@ -626,7 +626,7 @@ describe("AlertStore.fetch", () => {
     });
 
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
     expect(fetchMock.calls()).toHaveLength(1);
 
@@ -636,7 +636,7 @@ describe("AlertStore.fetch", () => {
     });
 
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toHaveProperty("error");
     expect(fetchMock.calls()).toHaveLength(10);
   });
@@ -656,7 +656,7 @@ describe("AlertStore.fetch", () => {
     );
 
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
 
     expect(store.info.reloadNeeded).toBe(true);
@@ -673,7 +673,7 @@ describe("AlertStore.fetch", () => {
     });
 
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toHaveProperty("error");
     expect(store.filters.values[0].applied).toBe(true);
   });
@@ -690,7 +690,7 @@ describe("AlertStore.fetch", () => {
     // initial fetch, should update settings
     store.settings.setValues({ foo: "bar" } as any);
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
     expect(store.settings.values).toMatchObject({
       staticColorLabels: ["job"],
@@ -702,7 +702,7 @@ describe("AlertStore.fetch", () => {
 
     // second fetch, should keep same settings
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
     expect(store.settings.values).toMatchObject({
       staticColorLabels: ["job"],
@@ -721,7 +721,7 @@ describe("AlertStore.fetch", () => {
     });
     const store = new AlertStore(["label=value"]);
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
     expect(store.info.upgradeReady).toBe(false);
 
@@ -731,7 +731,7 @@ describe("AlertStore.fetch", () => {
       body: JSON.stringify(response),
     });
     await expect(
-      store.fetch("", false, "", "", "", {})
+      store.fetch("", false, "", "", false, {})
     ).resolves.toBeUndefined();
     expect(store.info.upgradeReady).toBe(true);
   });
@@ -797,12 +797,19 @@ describe("AlertStore.fetch", () => {
     });
     const store = new AlertStore(["label=value"]);
     await expect(
-      store.fetch("", false, "sortOrder", "sortLabel", "sortReverse", {})
+      store.fetch("", false, "sortOrder", "sortLabel", false, {})
     ).resolves.toBeUndefined();
     expect(fetchMock.calls().length).toEqual(1);
-    expect(fetchMock.calls()[0][0]).toBe(
-      "/alerts.json?&gridLabel=&gridSortReverse=0&sortOrder=sortOrder&sortLabel=sortLabel&sortReverse=sortReverse&q=label%3Dvalue"
-    );
+    expect(fetchMock.calls()[0][0]).toBe("/alerts.json");
+    expect(JSON.parse(fetchMock.calls()[0][1]?.body as string)).toStrictEqual({
+      filters: ["label=value"],
+      gridLabel: "",
+      gridLimits: {},
+      gridSortReverse: false,
+      sortOrder: "sortOrder",
+      sortLabel: "sortLabel",
+      sortReverse: false,
+    });
   });
 
   it("uses correct query args with gridSortReverse=true", async () => {
@@ -813,12 +820,19 @@ describe("AlertStore.fetch", () => {
     });
     const store = new AlertStore(["label=value"]);
     await expect(
-      store.fetch("cluster", true, "sortOrder", "sortLabel", "sortReverse", {})
+      store.fetch("cluster", true, "sortOrder", "sortLabel", true, {})
     ).resolves.toBeUndefined();
     expect(fetchMock.calls().length).toEqual(1);
-    expect(fetchMock.calls()[0][0]).toBe(
-      "/alerts.json?&gridLabel=cluster&gridSortReverse=1&sortOrder=sortOrder&sortLabel=sortLabel&sortReverse=sortReverse&q=label%3Dvalue"
-    );
+    expect(fetchMock.calls()[0][0]).toBe("/alerts.json");
+    expect(JSON.parse(fetchMock.calls()[0][1]?.body as string)).toStrictEqual({
+      filters: ["label=value"],
+      gridLabel: "cluster",
+      gridLimits: {},
+      gridSortReverse: true,
+      sortOrder: "sortOrder",
+      sortLabel: "sortLabel",
+      sortReverse: true,
+    });
   });
 
   it("uses correct query args with limits", async () => {
@@ -830,13 +844,20 @@ describe("AlertStore.fetch", () => {
     const store = new AlertStore(["label=value"]);
     store.ui.setLimit("foo", "bar", 7);
     await expect(
-      store.fetch("cluster", true, "sortOrder", "sortLabel", "sortReverse", {
+      store.fetch("cluster", true, "sortOrder", "sortLabel", false, {
         bar: 7,
       })
     ).resolves.toBeUndefined();
     expect(fetchMock.calls().length).toEqual(1);
-    expect(fetchMock.calls()[0][0]).toBe(
-      "/alerts.json?&gridLabel=cluster&gridSortReverse=1&sortOrder=sortOrder&sortLabel=sortLabel&sortReverse=sortReverse&limit=bar=7&q=label%3Dvalue"
-    );
+    expect(fetchMock.calls()[0][0]).toBe("/alerts.json");
+    expect(JSON.parse(fetchMock.calls()[0][1]?.body as string)).toStrictEqual({
+      filters: ["label=value"],
+      gridLabel: "cluster",
+      gridLimits: { bar: 7 },
+      gridSortReverse: true,
+      sortOrder: "sortOrder",
+      sortLabel: "sortLabel",
+      sortReverse: false,
+    });
   });
 });
diff --git a/ui/src/Stores/AlertStore.ts b/ui/src/Stores/AlertStore.ts
index b1ef4bece..a22a20fb3 100644
--- a/ui/src/Stores/AlertStore.ts
+++ b/ui/src/Stores/AlertStore.ts
@@ -17,6 +17,7 @@ import type {
   APIAlertsResponseUpstreamsT,
   APIAlertsResponseUpstreamsClusterMapT,
   APISettingsT,
+  AlertsRequestT,
 } from "Models/APITypes";
 
 const QueryStringEncodeOptions = {
@@ -577,27 +578,28 @@ class AlertStore {
       gridSortReverse: boolean,
       sortOrder: string,
       sortLabel: string,
-      sortReverse: string,
+      sortReverse: boolean,
       limits: { [key: string]: number }
     ) => {
       this.status.setFetching();
 
-      const args: string[] = [
-        `gridLabel=${gridLabel}`,
-        `gridSortReverse=${gridSortReverse ? "1" : "0"}`,
-        `sortOrder=${sortOrder}`,
-        `sortLabel=${sortLabel}`,
-        `sortReverse=${sortReverse}`,
-        Object.entries(limits)
-          .map(([key, value]) => `limit=${key}=${value}`)
-          .join("&"),
-      ].filter((arg) => arg !== "");
+      const payload: AlertsRequestT = {
+        filters: this.filters.values.map((f) => f.raw),
+        gridLabel: gridLabel,
+        gridSortReverse: gridSortReverse,
+        gridLimits: limits,
+        sortOrder: sortOrder,
+        sortLabel: sortLabel,
+        sortReverse: sortReverse,
+      };
 
-      const alertsURI =
-        FormatBackendURI(`alerts.json?&${args.join("&")}&`) +
-        FormatAPIFilterQuery(this.filters.values.map((f) => f.raw));
+      const alertsURI = FormatBackendURI("alerts.json");
 
-      return await FetchGet(alertsURI, {}, this.info.setIsRetrying)
+      return await FetchGet(
+        alertsURI,
+        { method: "POST", body: JSON.stringify(payload) },
+        this.info.setIsRetrying
+      )
         .then((result) => {
           // we're sending requests with mode=cors so the response should also be type=cors
           // after a few failures in the retry loop we will switch to no-cors