diff --git a/packages/source-control-gitlab/src/server/GitLabCli.ts b/packages/source-control-gitlab/src/server/GitLabCli.ts
index 7690304897af4..c51ae52ffd59e 100644
--- a/packages/source-control-gitlab/src/server/GitLabCli.ts
+++ b/packages/source-control-gitlab/src/server/GitLabCli.ts
@@ -277,6 +277,7 @@ export class GitLabCli extends Context.Service<
 
     readonly listMergeRequests: (input: {
       readonly cwd: string;
+      readonly host?: string | undefined;
       readonly headSelector: string;
       readonly source?: SourceControlProvider.SourceControlRefSelector;
       readonly state: "open" | "closed" | "merged" | "all";
@@ -285,6 +286,7 @@ export class GitLabCli extends Context.Service<
 
     readonly getMergeRequest: (input: {
       readonly cwd: string;
+      readonly host?: string | undefined;
       readonly reference: string;
     }) => Effect.Effect<GitLabMergeRequestSummary, GitLabCliError>;
 
@@ -301,6 +303,7 @@ export class GitLabCli extends Context.Service<
 
     readonly createMergeRequest: (input: {
       readonly cwd: string;
+      readonly host?: string | undefined;
       readonly baseBranch: string;
       readonly headSelector: string;
       readonly source?: SourceControlProvider.SourceControlRefSelector;
@@ -311,10 +314,12 @@ export class GitLabCli extends Context.Service<
 
     readonly getDefaultBranch: (input: {
       readonly cwd: string;
+      readonly host?: string | undefined;
     }) => Effect.Effect<string | null, GitLabCliError>;
 
     readonly checkoutMergeRequest: (input: {
       readonly cwd: string;
+      readonly host?: string | undefined;
       readonly reference: string;
       readonly force?: boolean;
     }) => Effect.Effect<void, GitLabCliError>;
@@ -460,6 +465,7 @@ export const make = Effect.gen(function* () {
 
   const executeMergeRequest = (input: {
     readonly cwd: string;
+    readonly host?: string | undefined;
     readonly reference: string;
     readonly args: ReadonlyArray<string>;
   }) =>
@@ -480,6 +486,7 @@ export const make = Effect.gen(function* () {
     listMergeRequests: Effect.fn("GitLabCli.listMergeRequests")(function (input) {
       return execute({
         cwd: input.cwd,
+        host: input.host,
         args: [
           "mr",
           "list",
@@ -518,6 +525,7 @@ export const make = Effect.gen(function* () {
     getMergeRequest: Effect.fn("GitLabCli.getMergeRequest")(function (input) {
       return executeMergeRequest({
         cwd: input.cwd,
+        host: input.host,
         reference: input.reference,
         args: ["mr", "view", "--output", "json", "--", input.reference],
       }).pipe(
@@ -635,6 +643,7 @@ export const make = Effect.gen(function* () {
       const sourceProject = sourceProjectIdentifier(input.source);
       return execute({
         cwd: input.cwd,
+        host: input.host,
         args: [
           "api",
           "--method",
@@ -655,6 +664,7 @@ export const make = Effect.gen(function* () {
     getDefaultBranch: Effect.fn("GitLabCli.getDefaultBranch")(function (input) {
       return execute({
         cwd: input.cwd,
+        host: input.host,
         args: ["api", "projects/:fullpath"],
       }).pipe(
         Effect.map((result) => result.stdout.trim()),
@@ -677,6 +687,7 @@ export const make = Effect.gen(function* () {
     checkoutMergeRequest: Effect.fn("GitLabCli.checkoutMergeRequest")(function (input) {
       return executeMergeRequest({
         cwd: input.cwd,
+        host: input.host,
         reference: input.reference,
         args: ["mr", "checkout", "--", input.reference],
       }).pipe(Effect.asVoid);
diff --git a/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.test.ts b/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.test.ts
index 6ef52973ffe70..b039ee87108c6 100644
--- a/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.test.ts
+++ b/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.test.ts
@@ -281,3 +281,58 @@ it.effect.each(["read", "decode"] as const)(
       else assert.propertyVal(error.cause, "_tag", "SchemaError");
     }),
 );
+
+it.effect("sends merge request calls to the bound remote's host", () =>
+  Effect.gen(function* () {
+    const hosts: Array<string | undefined> = [];
+    const provider = yield* GitLabSourceControlProvider.make.pipe(
+      Effect.provide(
+        GitLabCli.layer.pipe(
+          Layer.provideMerge(
+            TestSourceControlHost.layer({
+              process: {
+                run: (input) => {
+                  hosts.push(input.env?.GITLAB_HOST);
+                  return Effect.succeed(
+                    processOutput(input.args[0] === "mr" ? "[]" : '{"default_branch":"main"}'),
+                  );
+                },
+              },
+            }),
+          ),
+        ),
+      ),
+    );
+    const context = {
+      provider: {
+        kind: SourceControlProviderKind.make("gitlab"),
+        name: "GitLab Self-Hosted",
+        baseUrl: "https://gitlab.example.test",
+      },
+      remoteName: "work",
+      remoteUrl: "git@gitlab.example.test:group/project.git",
+    };
+
+    yield* provider.listChangeRequests({
+      cwd: "/repo",
+      context,
+      headSelector: "feature",
+      state: "open",
+    });
+    yield* provider.getDefaultBranch({ cwd: "/repo", context });
+    yield* provider.createChangeRequest({
+      cwd: "/repo",
+      context,
+      baseRefName: "main",
+      headSelector: "feature",
+      title: "Feature",
+      bodyFile: "/tmp/body.md",
+    });
+
+    assert.deepStrictEqual(hosts, [
+      "gitlab.example.test",
+      "gitlab.example.test",
+      "gitlab.example.test",
+    ]);
+  }),
+);
diff --git a/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.ts b/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.ts
index 9f599794057fc..782e5e8edb491 100644
--- a/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.ts
+++ b/packages/source-control-gitlab/src/server/GitLabSourceControlProvider.ts
@@ -166,6 +166,9 @@ export const discovery = {
     "Install the GitLab command-line tool (`glab`) from https://gitlab.com/gitlab-org/cli or your package manager (for example `brew install glab`).",
 } satisfies SourceControlCliDiscoverySpec;
 
+const contextHost = (context: SourceControlProvider.SourceControlProviderContext | undefined) =>
+  context === undefined ? undefined : new URL(context.provider.baseUrl).host;
+
 export const make = Effect.gen(function* () {
   const gitlab = yield* GitLabCli.GitLabCli;
   const { git } = yield* SourceControlHost.SourceControlHost;
@@ -234,6 +237,7 @@ export const make = Effect.gen(function* () {
         return gitlab
           .listMergeRequests({
             cwd: input.cwd,
+            host: contextHost(input.context),
             headSelector: input.headSelector,
             ...(source ? { source } : {}),
             state: input.state,
@@ -259,7 +263,7 @@ export const make = Effect.gen(function* () {
       },
     ),
     getChangeRequest: Effect.fn("GitLabSourceControlProvider.getChangeRequest")(function (input) {
-      return gitlab.getMergeRequest(input).pipe(
+      return gitlab.getMergeRequest({ ...input, host: contextHost(input.context) }).pipe(
         Effect.map(toChangeRequest),
         Effect.mapError(
           (error) =>
@@ -283,6 +287,7 @@ export const make = Effect.gen(function* () {
         return gitlab
           .createMergeRequest({
             cwd: input.cwd,
+            host: contextHost(input.context),
             baseBranch: input.baseRefName,
             headSelector: input.headSelector,
             ...(source ? { source } : {}),
@@ -347,7 +352,7 @@ export const make = Effect.gen(function* () {
       );
     }),
     getDefaultBranch: Effect.fn("GitLabSourceControlProvider.getDefaultBranch")(function (input) {
-      return gitlab.getDefaultBranch(input).pipe(
+      return gitlab.getDefaultBranch({ ...input, host: contextHost(input.context) }).pipe(
         Effect.mapError(
           (error) =>
             new SourceControlProviderError({
@@ -363,7 +368,7 @@ export const make = Effect.gen(function* () {
     }),
     checkoutChangeRequest: Effect.fn("GitLabSourceControlProvider.checkoutChangeRequest")(
       function (input) {
-        return gitlab.checkoutMergeRequest(input).pipe(
+        return gitlab.checkoutMergeRequest({ ...input, host: contextHost(input.context) }).pipe(
           Effect.mapError(
             (error) =>
               new SourceControlProviderError({