diff --git a/public/app/features/provisioning/Wizard/ConnectStep.tsx b/public/app/features/provisioning/Wizard/ConnectStep.tsx
index bd1e775a596..4a3f882c1b4 100644
--- a/public/app/features/provisioning/Wizard/ConnectStep.tsx
+++ b/public/app/features/provisioning/Wizard/ConnectStep.tsx
@@ -25,7 +25,11 @@ export function ConnectStep() {
 
   // We don't need to dynamically react on repo type changes, so we use getValues for it
   const type = getValues('repository.type');
-  const [repositoryUrl = '', repositoryToken = ''] = watch(['repository.url', 'repository.token']);
+  const [repositoryUrl = '', repositoryToken = '', repositoryTokenUser = ''] = watch([
+    'repository.url',
+    'repository.token',
+    'repository.tokenUser',
+  ]);
   const isGitBased = isGitProvider(type);
 
   const {
@@ -36,6 +40,7 @@ export function ConnectStep() {
     repositoryType: type,
     repositoryUrl,
     repositoryToken,
+    repositoryTokenUser,
   });
 
   const gitFields = isGitBased ? getGitProviderFields(type) : null;
diff --git a/public/app/features/provisioning/hooks/useBranchOptions.ts b/public/app/features/provisioning/hooks/useBranchOptions.ts
index fc0f6b7dfc9..e4af6ab1f58 100644
--- a/public/app/features/provisioning/hooks/useBranchOptions.ts
+++ b/public/app/features/provisioning/hooks/useBranchOptions.ts
@@ -14,11 +14,18 @@ export interface UseBranchOptionsProps {
   repositoryType: RepoType;
   repositoryUrl: string;
   repositoryToken: string;
+  repositoryTokenUser?: string;
 }
 
-export function useBranchOptions({ repositoryType, repositoryUrl = '', repositoryToken = '' }: UseBranchOptionsProps) {
+export function useBranchOptions({
+  repositoryType,
+  repositoryUrl = '',
+  repositoryToken = '',
+  repositoryTokenUser = '',
+}: UseBranchOptionsProps) {
   const trimmedUrl = repositoryUrl.trim();
   const trimmedToken = repositoryToken.trim();
+  const trimmedTokenUser = repositoryTokenUser.trim();
 
   const hasRequiredData = useMemo(() => {
     if (!isSupportedGitProvider(repositoryType)) {
@@ -27,10 +34,11 @@ export function useBranchOptions({ repositoryType, repositoryUrl = '', repositor
 
     const hasUrl = trimmedUrl.length > 0;
     const hasToken = trimmedToken.length > 0;
+    const hasTokenUser = repositoryType === 'bitbucket' ? trimmedTokenUser.length > 0 : true;
     const repoInfo = hasUrl ? parseRepositoryUrl(trimmedUrl, repositoryType) : null;
 
-    return hasUrl && hasToken && repoInfo !== null;
-  }, [trimmedUrl, trimmedToken, repositoryType]);
+    return hasUrl && hasToken && hasTokenUser && repoInfo !== null;
+  }, [trimmedUrl, trimmedToken, trimmedTokenUser, repositoryType]);
 
   const fetchOptions = useMemo(
     () => async (): Promise<Array<{ label: string; value: string }>> => {
@@ -44,14 +52,16 @@ export function useBranchOptions({ repositoryType, repositoryUrl = '', repositor
         throw new Error('Invalid repository URL format');
       }
 
-      const branchData = await fetchAllBranches(repositoryType, repoInfo.owner, repoInfo.repo, trimmedToken);
+      // For Bitbucket, combine username and app password for Basic auth
+      const authToken = repositoryType === 'bitbucket' ? `${trimmedTokenUser}:${trimmedToken}` : trimmedToken;
+      const branchData = await fetchAllBranches(repositoryType, repoInfo.owner, repoInfo.repo, authToken);
 
       return branchData.map((branch) => ({
         label: branch.name,
         value: branch.name,
       }));
     },
-    [hasRequiredData, trimmedUrl, trimmedToken, repositoryType]
+    [hasRequiredData, trimmedUrl, trimmedToken, trimmedTokenUser, repositoryType]
   );
 
   const asyncState = useAsync(fetchOptions, [fetchOptions]);
diff --git a/public/app/features/provisioning/utils/httpUtils.ts b/public/app/features/provisioning/utils/httpUtils.ts
index f433173892a..6e9cbc4e933 100644
--- a/public/app/features/provisioning/utils/httpUtils.ts
+++ b/public/app/features/provisioning/utils/httpUtils.ts
@@ -50,7 +50,7 @@ export function getProviderHeaders(repositoryType: string, token: string): Recor
     case 'gitlab':
       return { 'Private-Token': token };
     case 'bitbucket':
-      return { Authorization: `Bearer ${token}` };
+      return { Authorization: `Basic ${btoa(token)}` };
     default:
       throw new Error(
         t('provisioning.http-utils.unsupported-repository-type', 'Unsupported repository type: {{repositoryType}}', {
@@ -82,7 +82,7 @@ export async function makeApiRequest(request: ApiRequest) {
   return response.json();
 }
 
-// GitHub and GitLab limit results to 100 items per page, so we need to paginate
+// GitHub, GitLab, and Bitbucket limit results to 100 items per page, so we need to paginate
 async function fetchWithPagination(
   buildUrl: (page: number) => string,
   headers: Record<string, string>
@@ -95,9 +95,12 @@ async function fetchWithPagination(
     const url = buildUrl(page);
     const data = await makeApiRequest({ url, headers });
 
-    if (Array.isArray(data) && data.length > 0) {
-      allBranches.push(...data);
-      hasMorePages = data.length === 100;
+    // Handle GitHub/GitLab format (direct array) and Bitbucket format ({ values: [...] })
+    const branches = Array.isArray(data) ? data : data?.values;
+
+    if (Array.isArray(branches) && branches.length > 0) {
+      allBranches.push(...branches);
+      hasMorePages = branches.length === 100;
       page++;
     } else {
       hasMorePages = false;
@@ -135,14 +138,10 @@ export async function fetchAllBitbucketBranches(
   repo: string,
   headers: Record<string, string>
 ): Promise<Array<{ name: string }>> {
-  const url = `https://api.bitbucket.org/2.0/repositories/${owner}/${repo}/refs/branches?pagelen=1000`;
-  const data = await makeApiRequest({ url, headers });
-
-  if (data && Array.isArray(data.values)) {
-    return data.values;
-  }
-
-  return [];
+  return fetchWithPagination(
+    (page) => `https://api.bitbucket.org/2.0/repositories/${owner}/${repo}/refs/branches?pagelen=100&page=${page}`,
+    headers
+  );
 }
 
 export async function fetchAllBranches(