diff --git a/README.md b/README.md
index c1eef1e..dd5aa51 100644
--- a/README.md
+++ b/README.md
@@ -39,6 +39,7 @@ For example, if the host cwd looks like:
 Then the docker command to run a container mounting the `/res` directory might look like this:
 ```sh
 docker run -it --rm -v $(pwd)/res:/data -e 'SPARQL_ENDPOINT=http://localhost:7200/repositories/${org}-${repo}' graphql
+docker run -v ./data:/data -e 'SPARQL_ENDPOINT=http://localhost:8080/orgs/${org}/repos/${repo}/${branchesLocks}/${branch}/query' -p 3001:3001 flexo-graphql
 ```
 
 ### Without docker
@@ -55,6 +56,7 @@ vr install
 Define a `SPARQL_ENDPOINT` environment variable that binds a **pattern** for the URL. The server will make the following substitutions in the pattern:
  - `${org}` -- replaced with the target `orgId` the user is querying
  - `${repo}` -- replaced with the target `repoId` the user is querying
+ - `${branchesLocks}` -- replaced with 'branches' or 'locks'
  - `${branch}` -- replaced with the target `branchId` the user is querying
 
 For example:
@@ -85,9 +87,9 @@ vr serve -c context.json -s schema.graphql
 
 By default, the server attempts to bind to port `3001`.
 
-The GraphQL endpoint will be available (via POST requests) at: `/orgs/${org}/repos/${repo}/branches/${branch}/graphql`
+The GraphQL endpoint will be available (via POST requests) at: `/orgs/${org}/repos/${repo}/${branchesLocks}/${branch}/graphql`
 
-Additionally, a GraphiQL interface is exposed at: `/orgs/${org}/repos/${repo}/branches/${branch}/`
+Additionally, a GraphiQL interface is exposed at: `/orgs/${org}/repos/${repo}/${branchesLocks}/${branch}/`
 
 
 ## Documentation
diff --git a/public/index.html b/public/index.html
index 95192a6..814b6e4 100644
--- a/public/index.html
+++ b/public/index.html
@@ -44,6 +44,13 @@ <h1>Flexo GraphQL Service</h1>
         <span>Repo:</span>
         <input type="text" name="repo">
       </label>
+      <label>
+        <span>Branch or Lock:</span>
+        <select name="branchesLocks">
+          <option value="branches" selected>Branch</option>
+          <option value="locks">Lock</option>
+        </select>
+      </label>
       <label>
         <span>Branch:</span>
         <input type="text" name="branch" placeholder="master">
diff --git a/src/server.ts b/src/server.ts
index c1e00ba..72366dd 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -96,7 +96,7 @@ const sx_graphql_schema_transformed = print(y_doc_schema_transformed) as string;
 const y_apollo = new SchemaHandler(sx_graphql_schema_transformed);
 
 // route pattern
-const sx_pattern = `/orgs/:org/repos/:repo/branches/:branch`;
+const sx_pattern = `/orgs/:org/repos/:repo/:branchesLocks/:branch`;
 
 async function graphiql(y_ctx: RouterContext<string>) {
 	await send(y_ctx, './', {
@@ -122,7 +122,7 @@ const y_router = new Router()
 	.get('/', async(y_ctx) => {
 		const d_params = y_ctx.request.url.searchParams;
 		if(d_params.has('org') && d_params.has('repo')) {
-			return await y_ctx.response.redirect(`/orgs/${d_params.get('org')}/repos/${d_params.get('repo')}/branches/${d_params.get('branch') || 'master'}/`);
+			return await y_ctx.response.redirect(`/orgs/${d_params.get('org')}/repos/${d_params.get('repo')}/${d_params.get('branchesLocks')}/${d_params.get('branch') || 'master'}/`);
 		}
 
 		await send(y_ctx, './', {
@@ -247,7 +247,7 @@ const y_router = new Router()
 
 		// materialize endpoint URL
 		const p_endpoint: string = P_ENDPOINT.replace(/\$\{([^}]+)\}/g, (s_0, s_var: keyof typeof h_params) => h_params[s_var]!);
-
+		console.log('sending to ' + p_endpoint);
 		// collect all other headers
 		const h_headers = scrub_headers(d_req);