Add call API mcp endpoint

app/src/main/java/io/xpipe/app/beacon/mcp/AppMcpServer.java

@@ -73,6 +73,7 @@ public class AppMcpServer {
         mutationTools.add(McpTools.runCommand());
         mutationTools.add(McpTools.runScript());
         mutationTools.add(McpTools.toggleState());
+        readOnlyTools.add(McpTools.callApi());
 
         for (McpServerFeatures.SyncToolSpecification readOnlyTool : readOnlyTools) {
             syncServer.addTool(readOnlyTool);

app/src/main/java/io/xpipe/app/beacon/mcp/McpToolHandler.java

@@ -33,13 +33,13 @@ public interface McpToolHandler
         } catch (BeaconClientException e) {
             ErrorEventFactory.fromThrowable(e).expected().omit().handle();
             return McpSchema.CallToolResult.builder()
-                    .addTextContent(e.getMessage())
+                    .addTextContent(e.getMessage() != null ? e.getMessage() : e.getClass().getSimpleName())
                     .isError(true)
                     .build();
         } catch (Throwable e) {
             ErrorEventFactory.fromThrowable(e).omit().handle();
             return McpSchema.CallToolResult.builder()
-                    .addTextContent(e.getMessage())
+                    .addTextContent(e.getMessage() != null ? e.getMessage() : e.getClass().getSimpleName())
                     .isError(true)
                     .build();
         }

app/src/main/java/io/xpipe/app/beacon/mcp/McpTools.java

@@ -5,6 +5,7 @@ import io.xpipe.app.core.AppExtensionManager;
 import io.xpipe.app.core.AppNames;
 import io.xpipe.app.ext.*;
 import io.xpipe.app.hub.comp.StoreViewState;
+import io.xpipe.app.prefs.AppPrefs;
 import io.xpipe.app.process.ScriptHelper;
 import io.xpipe.app.process.ShellControl;
 import io.xpipe.app.process.TerminalInitScriptConfig;
@@ -13,7 +14,9 @@ import io.xpipe.app.storage.DataStorage;
 import io.xpipe.app.storage.DataStorageQuery;
 import io.xpipe.app.terminal.TerminalLaunch;
 import io.xpipe.app.util.CommandDialog;
+import io.xpipe.app.util.HttpHelper;
 import io.xpipe.beacon.BeaconClientException;
+import io.xpipe.beacon.BeaconInterface;
 import io.xpipe.core.FilePath;
 import io.xpipe.core.JacksonMapper;
 
@@ -27,6 +30,9 @@ import lombok.Value;
 import lombok.extern.jackson.Jacksonized;
 
 import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
@@ -74,6 +80,44 @@ public final class McpTools {
                 .build();
     }
 
+    public static McpServerFeatures.SyncToolSpecification callApi() throws IOException {
+        var tool = McpSchemaFiles.loadTool("call_api.json");
+        return McpServerFeatures.SyncToolSpecification.builder()
+                .tool(tool)
+                .callHandler(McpToolHandler.of((req) -> {
+                    var path = req.getStringArgument("path");
+                    var payload = req.getRawRequest().arguments().get("payload");
+                    var payloadJson = JacksonMapper.getDefault().valueToTree(payload);
+
+                    if (!AppPrefs.get().enableHttpApi().get()) {
+                        throw new BeaconClientException("HTTP API is not enabled");
+                    }
+
+                    var i = BeaconInterface.byPath(path);
+                    if (i.isEmpty()) {
+                        throw new BeaconClientException("No API endpoint found for path " + path);
+                    }
+
+                    var httpReq = HttpRequest.newBuilder().uri(URI.create("http://localhost:" + AppBeaconServer.get().getPort() + path))
+                            .header("Authorization", "Bearer " + AppPrefs.get().apiKey().get())
+                            .POST(HttpRequest.BodyPublishers.ofString(payloadJson.toPrettyString())).build();
+                    var httpRes = HttpHelper.client().send(httpReq, HttpResponse.BodyHandlers.ofString());
+
+                    var resJson = JacksonMapper.getDefault().readTree(httpRes.body());
+                    if (httpRes.statusCode() >= 400) {
+                        return McpSchema.CallToolResult.builder()
+                                .addTextContent(resJson.toPrettyString())
+                                .isError(true)
+                                .build();
+                    }
+
+                    return McpSchema.CallToolResult.builder()
+                            .addTextContent(resJson.toPrettyString())
+                            .build();
+                }))
+                .build();
+    }
+
     @Jacksonized
     @Builder
     @Value

app/src/main/resources/io/xpipe/app/resources/mcp/call_api.json

@@ -0,0 +1,26 @@
+{
+  "name": "call_api",
+  "description": "Calls the XPipe HTTP API at a specified endpoint with a json payload. The OpenAPI schema file is available at https://docs.xpipe.io/openapi.yaml",
+  "inputSchema": {
+    "type": "object",
+    "properties": {
+      "path": {
+        "type": "string",
+        "description": "The API endpoint to call, e.g. /connection/add"
+      },
+      "payload": {
+        "type": "object",
+        "description": "The json payload for the API endpoint according to the schema"
+      }
+    },
+    "required": [
+      "path",
+      "payload"
+    ]
+  },
+  "annotations": {
+    "readOnlyHint": false,
+    "destructiveHint": true,
+    "openWorldHint": false
+  }
+}

beacon/src/main/java/io/xpipe/beacon/api/CategoryInfoExchange.java

@@ -43,7 +43,6 @@ public class CategoryInfoExchange extends BeaconInterface<CategoryInfoExchange.R
         @NonNull
         UUID category;
 
-        @NonNull
         UUID parentCategory;
 
         @NonNull