diff --git a/src/main/app/ipc-contracts/platform.ts b/src/main/app/ipc-contracts/platform.ts
index 17d4daec..0e84140c 100644
--- a/src/main/app/ipc-contracts/platform.ts
+++ b/src/main/app/ipc-contracts/platform.ts
@@ -17,6 +17,7 @@ export const platformContracts = {
   setIntegrationKey: z.strictObject({ name: z.enum(INTEGRATION_KEY_NAMES), value: z.string() }) satisfies z.ZodType<C.SetIntegrationKeyInput>,
   clearIntegrationKey: z.strictObject({ name: z.enum(INTEGRATION_KEY_NAMES) }) satisfies z.ZodType<C.ClearIntegrationKeyInput>,
   saveProviderCredential: z.strictObject({ orgId: id, providerId: id, secret: z.string(), model: z.string().nullable() }) satisfies z.ZodType<C.SaveProviderCredentialInput>,
+  providerEndpoint: z.strictObject({ orgId: id, providerId: id }),
   setProviderModel: z.strictObject({ orgId: id, providerId: id, model: z.string().max(200) }) satisfies z.ZodType<C.SetProviderModelInput>,
   revokeProviderCredential: z.strictObject({ orgId: id, providerId: id }) satisfies z.ZodType<C.RevokeProviderCredentialInput>,
   startProviderOAuth: z.strictObject({
diff --git a/src/main/app/ipc-handlers.ts b/src/main/app/ipc-handlers.ts
index 0b7b1080..f6115840 100644
--- a/src/main/app/ipc-handlers.ts
+++ b/src/main/app/ipc-handlers.ts
@@ -226,6 +226,13 @@ export function registerIpcHandlers(deps: IpcDeps): void {
   handle("deleteMessage", (input) => mutate(() => chat.deleteMessage(input)));
   handle("markChatSpaceRead", (input) => mutate(() => chat.markSpaceRead(input)));
   handle("saveProviderCredential", (input) => mutate(() => providers.saveCredential(input)));
+  handle("providerEndpoint", (input) => {
+    try {
+      return ok(providers.endpoint(input.orgId, input.providerId));
+    } catch (error) {
+      return fail("provider_endpoint_failed", error instanceof Error ? error.message : String(error));
+    }
+  });
   handle("setProviderModel", (input) => mutate(() => setProviderModel(deps.connection.db, input)));
   handle("revokeProviderCredential", async (input) => {
     try {
diff --git a/src/main/services/provider-endpoint.ts b/src/main/services/provider-endpoint.ts
new file mode 100644
index 00000000..fd68cba5
--- /dev/null
+++ b/src/main/services/provider-endpoint.ts
@@ -0,0 +1,29 @@
+import type { DatabaseSync } from "node:sqlite";
+import type { ProviderEndpoint } from "../../shared/commands";
+import type { AuthBrokerService } from "./auth-broker-service";
+import { loadCredential, type ProviderRow } from "./provider-internal";
+
+function savedPayload(db: DatabaseSync, authBroker: AuthBrokerService, orgId: string, providerId: string): Record<string, unknown> | null {
+  const provider = db.prepare("select * from providers where id = ? and org_id = ?").get(providerId, orgId) as ProviderRow | undefined;
+  if (!provider) throw new Error("Provider was not found.");
+  if (provider.auth_type !== "cloud" || !provider.credential_id) return null;
+  return JSON.parse(loadCredential(authBroker, orgId, provider).secret) as Record<string, unknown>;
+}
+
+const text = (value: unknown): string => (typeof value === "string" ? value : "");
+
+/** The saved address, region, project and deployment of a cloud or custom provider, so its form shows what is in use; never the key. */
+export function providerEndpoint(db: DatabaseSync, authBroker: AuthBrokerService, orgId: string, providerId: string): ProviderEndpoint | null {
+  const saved = savedPayload(db, authBroker, orgId, providerId);
+  return saved ? { baseUrl: text(saved.baseUrl), region: text(saved.region), projectId: text(saved.projectId), deployment: text(saved.deployment) } : null;
+}
+
+/** A cloud form that left its key blank asks to keep the saved key; the saved key goes into the new payload. */
+export function withSavedSecret(db: DatabaseSync, authBroker: AuthBrokerService, orgId: string, providerId: string, secret: string): string {
+  const payload = JSON.parse(secret) as Record<string, unknown>;
+  if (payload.keepSavedSecret !== true) return secret;
+  const saved = savedPayload(db, authBroker, orgId, providerId);
+  if (!saved) throw new Error("There is no saved key to keep; enter the key.");
+  delete payload.keepSavedSecret;
+  return JSON.stringify({ ...payload, secret: saved.secret });
+}
diff --git a/src/main/services/provider-service.ts b/src/main/services/provider-service.ts
index 10a9ff2a..ab1d9963 100644
--- a/src/main/services/provider-service.ts
+++ b/src/main/services/provider-service.ts
@@ -1,5 +1,6 @@
 import type { DatabaseSync } from "node:sqlite";
-import type { CancelProviderResponseInput, ListProviderModelsInput, RevokeProviderCredentialInput, SaveProviderCredentialInput, StreamProviderResponseInput, UpdateProviderPolicyInput, SetProviderPricesInput } from "../../shared/commands";
+import type { CancelProviderResponseInput, ListProviderModelsInput, ProviderEndpoint, RevokeProviderCredentialInput, SaveProviderCredentialInput, StreamProviderResponseInput, UpdateProviderPolicyInput, SetProviderPricesInput } from "../../shared/commands";
+import { providerEndpoint, withSavedSecret } from "./provider-endpoint";
 import type { ProviderModelEntry } from "../../shared/provider-models";
 import { PROVIDER_AUTH_TYPE, PROVIDER_DATA_POLICY, type ProviderAuthType } from "../../shared/domain";
 import type { ProviderStreamRendererEvent } from "../../shared/provider-request-domain";
@@ -97,8 +98,9 @@ export class ProviderService {
     const provider = this.db.prepare("select * from providers where id = ? and org_id = ?")
       .get(input.providerId, input.orgId) as { provider_key: string; auth_type: ProviderAuthType } | undefined;
     if (!provider) throw new Error("Provider was not found.");
-    const secret = input.secret.trim();
-    if (!secret) throw new Error("Credential is required.");
+    const typed = input.secret.trim();
+    if (!typed) throw new Error("Credential is required.");
+    const secret = provider.auth_type === "cloud" ? withSavedSecret(this.db, this.authBroker, input.orgId, input.providerId, typed) : typed;
     const adapter = requireAdapter(this.adapters, provider.provider_key, provider.auth_type);
     adapter.parseAuthProfile(secret);
     const catalogEntry = requireCatalogEntry(provider.provider_key);
@@ -130,6 +132,10 @@ export class ProviderService {
     });
   }
 
+  endpoint(orgId: string, providerId: string): ProviderEndpoint | null {
+    return providerEndpoint(this.db, this.authBroker, orgId, providerId);
+  }
+
   /** Revokes at the provider where it can, then always disconnects and erases the credential here; a remote failure is reported, not hidden. */
   async revokeCredential(input: RevokeProviderCredentialInput): Promise<void> {
     const provider = this.db.prepare(`
diff --git a/src/preload/index.ts b/src/preload/index.ts
index 6c7c6a17..77b05f5b 100644
--- a/src/preload/index.ts
+++ b/src/preload/index.ts
@@ -55,6 +55,7 @@ const api: DesktopApi = {
   markChatSpaceRead: (input) => invoke(IPC_CHANNELS.markChatSpaceRead, input),
   saveProviderCredential: (input) => invoke(IPC_CHANNELS.saveProviderCredential, input),
   setProviderModel: (input) => invoke(IPC_CHANNELS.setProviderModel, input),
+  providerEndpoint: (input) => invoke(IPC_CHANNELS.providerEndpoint, input),
   revokeProviderCredential: (input) => invoke(IPC_CHANNELS.revokeProviderCredential, input),
   startProviderOAuth: (input) => invoke(IPC_CHANNELS.startProviderOAuth, input),
   cancelProviderOAuth: (input) => invoke(IPC_CHANNELS.cancelProviderOAuth, input),
diff --git a/src/renderer/src/i18n/zh.ts b/src/renderer/src/i18n/zh.ts
index fc8fa49a..cb911d94 100644
--- a/src/renderer/src/i18n/zh.ts
+++ b/src/renderer/src/i18n/zh.ts
@@ -680,6 +680,9 @@ export const zh: Record<string, string> = {
   "{percent}% of cap": "上限的 {percent}%",
   "Default model for {label}": "{label} 的默认模型",
   "Change model": "更换模型",
+  "Saved. Leave blank to keep it.": "已保存。留空即保留。",
+  "The saved settings could not be read: {error}": "无法读取已保存的设置：{error}",
+  "Loading saved settings…": "正在读取已保存的设置…",
   "Leave the model blank to use the provider's default. A changed model applies from the agent's next session.": "模型留空即使用 Provider 的默认模型。修改后的模型从该 Agent 的下一次会话起生效。",
   "{model} (provider default)": "{model}（Provider 默认）",
   "Chosen when the session starts": "会话开始时确定",
diff --git a/src/renderer/src/pages/settings/ProviderConnectionDialog.tsx b/src/renderer/src/pages/settings/ProviderConnectionDialog.tsx
index 0fb244e8..47423532 100644
--- a/src/renderer/src/pages/settings/ProviderConnectionDialog.tsx
+++ b/src/renderer/src/pages/settings/ProviderConnectionDialog.tsx
@@ -1,18 +1,38 @@
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import type { ProviderCatalogEntry, ProviderRecord } from "../../../../shared/domain";
 import { ProviderOAuthConnect } from "../../shared/ProviderOAuthConnect";
 import { Field } from "../../shared/ui";
 import { t } from "../../i18n/i18n";
 import type { ModelCheckResult } from "../../../../shared/desktop-api";
+import type { ProviderEndpoint } from "../../../../shared/commands";
 
-interface CloudFields {
-  baseUrl: string;
-  region: string;
-  projectId: string;
-  deployment: string;
+const CLOUD_DEFAULTS: ProviderEndpoint = { baseUrl: "", region: "", projectId: "", deployment: "" };
+
+/** The saved endpoint of a connected cloud or custom provider: undefined while loading, null when nothing is saved. */
+function useSavedEndpoint(provider: ProviderRecord, entry: ProviderCatalogEntry): { endpoint: ProviderEndpoint | null | undefined; error: string | null } {
+  const saved = entry.authType === "cloud" && Boolean(provider.credentialId);
+  const [state, setState] = useState<{ endpoint: ProviderEndpoint | null | undefined; error: string | null }>({ endpoint: saved ? undefined : null, error: null });
+  useEffect(() => {
+    if (!saved) return;
+    let live = true;
+    void window.agentCompany.providerEndpoint({ orgId: provider.orgId, providerId: provider.id }).then((result) => {
+      if (!live) return;
+      setState(result.ok ? { endpoint: result.data, error: null } : { endpoint: null, error: result.error.message });
+    });
+    return () => { live = false; };
+  }, [saved, provider.orgId, provider.id]);
+  return state;
 }
 
-const CLOUD_DEFAULTS: CloudFields = { baseUrl: "", region: "", projectId: "", deployment: "" };
+/** With a saved key the field may stay blank, which keeps it. */
+function SecretField({ label, saved, required }: { label: string; saved: boolean; required: boolean }) {
+  return (
+    <Field label={label}>
+      <input className="input" name="secret" type="password" required={required && !saved} placeholder={saved ? t("Saved. Leave blank to keep it.") : undefined} autoFocus />
+      {saved && <input type="hidden" name="keepSavedSecret" value="1" />}
+    </Field>
+  );
+}
 
 export function ProviderConnectFields({
   provider,
@@ -30,10 +50,16 @@ export function ProviderConnectFields({
       </>
     );
   }
-  if (entry.customEndpoint) {
-    return <CompatFieldsForm entry={entry} provider={provider} />;
-  }
-  return <CloudFieldsForm entry={entry} provider={provider} />;
+  return <SavedEndpointForm entry={entry} provider={provider} />;
+}
+
+function SavedEndpointForm({ provider, entry }: { provider: ProviderRecord; entry: ProviderCatalogEntry }) {
+  const { endpoint, error } = useSavedEndpoint(provider, entry);
+  if (error) return <div className="form-error" role="alert">{t("The saved settings could not be read: {error}", { error })}</div>;
+  if (endpoint === undefined) return <p style={{ fontSize: 12, color: "var(--text-3)", margin: 0 }}>{t("Loading saved settings…")}</p>;
+  return entry.customEndpoint
+    ? <CompatFieldsForm entry={entry} provider={provider} saved={endpoint} />
+    : <CloudFieldsForm entry={entry} provider={provider} saved={endpoint} />;
 }
 
 export function ProviderOAuthFields({
@@ -75,8 +101,8 @@ export function ProviderOAuthFields({
   );
 }
 
-function CompatFieldsForm({ entry, provider }: { entry: ProviderCatalogEntry; provider: ProviderRecord }) {
-  const [baseUrl, setBaseUrl] = useState("");
+function CompatFieldsForm({ entry, provider, saved }: { entry: ProviderCatalogEntry; provider: ProviderRecord; saved: ProviderEndpoint | null }) {
+  const [baseUrl, setBaseUrl] = useState(saved?.baseUrl ?? "");
   return (
     <>
       <p style={{ fontSize: 12, color: "var(--text-3)", lineHeight: 1.5, margin: 0 }}>{entry.credentialHelp}</p>
@@ -88,7 +114,7 @@ function CompatFieldsForm({ entry, provider }: { entry: ProviderCatalogEntry; pr
           onChange={(event) => setBaseUrl(event.target.value)}
         />
       </Field>
-      <Field label={t("API key (if the server asks for one)")}><input className="input" name="secret" type="password" /></Field>
+      <SecretField label={t("API key (if the server asks for one)")} saved={saved !== null} required={false} />
       <ModelPicker entry={entry} provider={provider} />
     </>
   );
@@ -159,9 +185,9 @@ export function ModelPicker({ entry, provider }: { entry: ProviderCatalogEntry;
   );
 }
 
-function CloudFieldsForm({ entry, provider }: { entry: ProviderCatalogEntry; provider: ProviderRecord }) {
-  const [state, setState] = useState<CloudFields>(CLOUD_DEFAULTS);
-  const update = (patch: Partial<CloudFields>) => setState((current) => ({ ...current, ...patch }));
+function CloudFieldsForm({ entry, provider, saved }: { entry: ProviderCatalogEntry; provider: ProviderRecord; saved: ProviderEndpoint | null }) {
+  const [state, setState] = useState<ProviderEndpoint>(saved ?? CLOUD_DEFAULTS);
+  const update = (patch: Partial<ProviderEndpoint>) => setState((current) => ({ ...current, ...patch }));
   return (
     <>
       <p style={{ fontSize: 12, color: "var(--text-3)", lineHeight: 1.5, margin: 0 }}>{entry.credentialHelp}</p>
@@ -177,9 +203,7 @@ function CloudFieldsForm({ entry, provider }: { entry: ProviderCatalogEntry; pro
       <Field label={t("Deployment / model id")}>
         <input className="input" name="cloudDeployment" value={state.deployment} onChange={(event) => update({ deployment: event.target.value })} />
       </Field>
-      <Field label={t("Credential")}>
-        <input className="input" name="secret" type="password" required autoFocus />
-      </Field>
+      <SecretField label={t("Credential")} saved={saved !== null} required />
       <Field label={t("Default model")}>
         <input className="input" name="model" defaultValue={provider.model ?? entry.defaultModel ?? ""} />
       </Field>
diff --git a/src/renderer/src/pages/settings/provider-secret.ts b/src/renderer/src/pages/settings/provider-secret.ts
index 7aad244e..e1e09727 100644
--- a/src/renderer/src/pages/settings/provider-secret.ts
+++ b/src/renderer/src/pages/settings/provider-secret.ts
@@ -9,6 +9,7 @@ export function composeSecret(entry: ProviderCatalogEntry, form: FormData): stri
     projectId: String(form.get("cloudProject") ?? "").trim(),
     deployment: String(form.get("cloudDeployment") ?? "").trim(),
     secret: raw,
+    ...(raw === "" && form.get("keepSavedSecret") === "1" ? { keepSavedSecret: true } : {}),
   };
   return JSON.stringify(payload);
 }
diff --git a/src/shared/commands/provider.ts b/src/shared/commands/provider.ts
index f1cb4a1f..9b9c7543 100644
--- a/src/shared/commands/provider.ts
+++ b/src/shared/commands/provider.ts
@@ -7,6 +7,14 @@ export interface SaveProviderCredentialInput {
   model: string | null;
 }
 
+/** The non-secret part of a saved cloud or custom-endpoint credential. */
+export interface ProviderEndpoint {
+  baseUrl: string;
+  region: string;
+  projectId: string;
+  deployment: string;
+}
+
 export interface SetProviderModelInput {
   orgId: string;
   providerId: string;
diff --git a/src/shared/desktop-api.ts b/src/shared/desktop-api.ts
index 25a9e5af..9e0ccc1c 100644
--- a/src/shared/desktop-api.ts
+++ b/src/shared/desktop-api.ts
@@ -73,6 +73,7 @@ import type {
   RevokeProviderCredentialInput,
   SaveProviderCredentialInput,
   SetProviderModelInput,
+  ProviderEndpoint,
   ConnectComposioToolkitInput,
   ConnectComposioToolkitResult,
   ConnectorCatalogEntry,
@@ -165,6 +166,8 @@ export interface DesktopApi {
   markChatSpaceRead(input: MarkChatSpaceReadInput): Promise<DesktopResult<AppSnapshot>>;
   saveProviderCredential(input: SaveProviderCredentialInput): Promise<DesktopResult<AppSnapshot>>;
   setProviderModel(input: SetProviderModelInput): Promise<DesktopResult<AppSnapshot>>;
+  /** Null when the provider has no saved cloud or custom-endpoint credential. */
+  providerEndpoint(input: { orgId: string; providerId: string }): Promise<DesktopResult<ProviderEndpoint | null>>;
   revokeProviderCredential(input: RevokeProviderCredentialInput): Promise<DesktopResult<AppSnapshot>>;
   startProviderOAuth(input: StartProviderOAuthInput): Promise<DesktopResult<StartProviderOAuthResult>>;
   cancelProviderOAuth(input: CancelProviderOAuthInput): Promise<DesktopResult<null>>;
diff --git a/src/shared/ipc.ts b/src/shared/ipc.ts
index fa2ed8eb..71837836 100644
--- a/src/shared/ipc.ts
+++ b/src/shared/ipc.ts
@@ -28,6 +28,7 @@ export const IPC_CHANNELS = {
   markChatSpaceRead: "agentcompany:mark-chat-space-read",
   saveProviderCredential: "agentcompany:save-provider-credential",
   setProviderModel: "agentcompany:set-provider-model",
+  providerEndpoint: "agentcompany:provider-endpoint",
   revokeProviderCredential: "agentcompany:revoke-provider-credential",
   startProviderOAuth: "agentcompany:start-provider-oauth",
   cancelProviderOAuth: "agentcompany:cancel-provider-oauth",
diff --git a/tests/e2e/desktop.spec.ts b/tests/e2e/desktop.spec.ts
index 46318b64..05325f38 100644
--- a/tests/e2e/desktop.spec.ts
+++ b/tests/e2e/desktop.spec.ts
@@ -212,6 +212,22 @@ test("onboards, hires, and creates work in the Electron shell", async () => {
     await changeModel(() => "gpt-5.4");
     await expect(page.getByText("gpt-5.4 · API key").first()).toBeVisible();
 
+    // A saved custom endpoint reopens with its address filled in, and a blank key keeps the saved one.
+    await page.locator("div", { hasText: /^Custom OpenAI-compatible$/ }).locator("xpath=../..").getByRole("button", { name: "Connect" }).click();
+    await page.locator(".modal input[name=cloudBaseUrl]").fill("http://localhost:11434/v1");
+    await page.locator(".modal input[name=secret]").fill("local-key");
+    await page.locator(".modal [name=model]").fill("llama3");
+    await page.locator(".modal").getByRole("button", { name: "Save" }).click();
+    const customRow = page.locator(".reveal-row", { hasText: "Custom OpenAI-compatible" });
+    await customRow.getByRole("button", { name: "Manage" }).click();
+    await expect(page.locator(".modal input[name=cloudBaseUrl]")).toHaveValue("http://localhost:11434/v1");
+    await expect(page.locator(".modal input[name=secret]")).toHaveAttribute("placeholder", "Saved. Leave blank to keep it.");
+    await page.locator(".modal [name=model]").fill("llama3.1");
+    await page.locator(".modal").getByRole("button", { name: "Save" }).click();
+    await expect(customRow.getByText("llama3.1 · Cloud")).toBeVisible();
+    await customRow.getByRole("button", { name: "Disconnect" }).click();
+    await expect(customRow).toHaveCount(0);
+
     // Skills are built-in now: no Skills tab exists, yet the bundled
     // catalogue imported itself during onboarding.
     await expect(page.getByRole("button", { name: "Skills" })).toHaveCount(0);
diff --git a/tests/unit/provider-endpoint.test.ts b/tests/unit/provider-endpoint.test.ts
new file mode 100644
index 00000000..64b6c1a2
--- /dev/null
+++ b/tests/unit/provider-endpoint.test.ts
@@ -0,0 +1,37 @@
+import { randomUUID } from "node:crypto";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { describe, expect, test } from "vitest";
+import { DatabaseConnection } from "../../src/main/database/connection";
+import { OrganizationService } from "../../src/main/services/organization-service";
+import { ProviderService } from "../../src/main/services/provider-service";
+import { providerAdapters } from "../../src/main/services/provider-adapters";
+import { AuthBrokerService } from "../../src/main/services/auth-broker-service";
+import { loadCredential, type ProviderRow } from "../../src/main/services/provider-internal";
+
+const vault = { encryptSecret: (secret: string) => Buffer.from(secret, "utf8"), decryptSecret: (ciphertext: Buffer) => ciphertext.toString("utf8") };
+
+describe("a saved cloud endpoint", () => {
+  test("refills its form without the key, and a blank key keeps the saved one", () => {
+    const connection = new DatabaseConnection(join(tmpdir(), `ac-endpoint-${randomUUID()}.db`));
+    const db = connection.db;
+    const providers = new ProviderService(db, providerAdapters, vault);
+    let orgId = "";
+    connection.transaction(() => {
+      orgId = new OrganizationService(db).createOrganization({ organizationName: "Acme", employeeName: "Dana", mission: "m", goal: "g" });
+    });
+    const azure = (db.prepare("select id from providers where org_id = ? and provider_key = 'azure-openai'").get(orgId) as { id: string }).id;
+    const storedSecret = () => JSON.parse(loadCredential(new AuthBrokerService(db, vault), orgId, db.prepare("select * from providers where id = ?").get(azure) as unknown as ProviderRow).secret) as Record<string, unknown>;
+
+    expect(providers.endpoint(orgId, azure)).toBeNull();
+    const keep = (deployment: string) => JSON.stringify({ baseUrl: "https://acme.openai.azure.com", region: "", projectId: "", deployment, secret: "", keepSavedSecret: true });
+    expect(() => providers.saveCredential({ orgId, providerId: azure, secret: keep("d1"), model: "d1" })).toThrow("There is no saved key to keep; enter the key.");
+
+    providers.saveCredential({ orgId, providerId: azure, secret: JSON.stringify({ baseUrl: "https://acme.openai.azure.com", region: "", projectId: "", deployment: "d1", secret: "az-key" }), model: "d1" });
+    expect(providers.endpoint(orgId, azure)).toEqual({ baseUrl: "https://acme.openai.azure.com", region: "", projectId: "", deployment: "d1" });
+
+    providers.saveCredential({ orgId, providerId: azure, secret: keep("d2"), model: "d2" });
+    expect(providers.endpoint(orgId, azure)?.deployment).toBe("d2");
+    expect(storedSecret()).toEqual({ baseUrl: "https://acme.openai.azure.com", region: "", projectId: "", deployment: "d2", secret: "az-key" });
+  });
+});