[BUG] Desktop extension install silently fails — "Installing unsigned extension" then no completion, no toggle (Autodesk Fusion connector)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Environment

• Claude Desktop version: Claude 1.12603.1 (3df4fd) 2026-06-11T16:57:36.000Z
• OS: macOS 26.5.1 (25F80)
• Plan/org: Pro; org allowlist enabled: false (per logs)

Summary
Installing the "Autodesk Fusion" connector (desktop extension id ant.dir.gh.autodesk.fusion-mcp) does nothing. The .mcpb downloads, the log prints "Installing unsigned extension from …", then there's no success/error line and no enable/disable toggle ever appears. Same result from both install entry points.

Expected: extension installs and shows an enable/disable toggle.
Actual: silent no-op; nothing registered; no error in the UI.

Relevant logs (~/Library/Logs/Claude/main.log)
[download] Starting download from …/dxt/extensions/ant.dir.gh.autodesk.fusion-mcp/download
[warn] Installing unsigned extension from /var/folders/…/T/dxt-download-*.mcpb
(no further install/registration line)
Organization allowlist enabled: false
can_install check completed: 0 extensions checked

Additional context

• Not a policy block: org allowlist is disabled and the dxt blocklist is empty (0 entries).
• The same extension worked before a full app data reset (its MCP server ran fine for ~a week), and the failure persists after fully clearing Claude data/cache.
• Workaround confirming the bundle is fine: adding the same server manually to claude_desktop_config.json via mcp-remote → http://127.0.0.1:27182/mcp works. So the bug is in the extension install routine, not the bundle.

What Should Happen?

it should install and enable claude fusion

Error Messages/Logs

2026-06-10T19:10:23.244Z [Autodesk Fusion] [info] Message from client: {"jsonrpc":"2.0","method":"notifications/cancelled","params":{"requestId":1,"reason":"McpError: MCP error -32001: Request timed out"}} { metadata: undefined }
2026-06-11T07:17:35.225Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-11T07:17:35.226Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-11T07:17:35.226Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-11T07:17:35.259Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-11T07:17:35.304Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-11T07:17:35.304Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-11T12:57:11.386Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-11T12:57:11.388Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-11T12:57:11.401Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-11T12:57:11.451Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-11T12:57:12.706Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-11T12:57:12.771Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-11T12:57:12.772Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-11T12:57:12.772Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-11T12:57:12.775Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"error":{"code":-32600,"message":"Session not initialized. Call 'initialize' first."}} { metadata: undefined }
2026-06-11T12:57:12.779Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-11T14:41:26.117Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-11T14:41:26.117Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-11T14:41:26.117Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-11T14:41:26.128Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-11T14:41:26.169Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-11T14:41:26.169Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-11T14:58:57.660Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-11T14:58:57.662Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-11T14:58:57.677Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-11T14:58:57.784Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-11T14:58:59.150Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-11T14:58:59.218Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-11T14:58:59.220Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-11T14:58:59.220Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-11T14:58:59.226Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-11T14:58:59.227Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"result":{"resources":[{"description":"entity_type values for ElectronicsRead; per-class fields/filters/pagination: resource://mcp.electronics_schema_{class}.","mimeType":"application/json","name":"electronics_entity_types","uri":"r...[9673 chars truncated]..._schema_via","uri":"resource://mcp.electronics_schema_via"},{"description":"electronics.Wire fields, filters, and operators for read queries.","mimeType":"application/json","name":"electronics_schema_wire","uri":"resource://mcp.electronics_schema_wire"}]}} { metadata: undefined }
2026-06-12T12:54:03.542Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-12T12:54:03.542Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-12T12:54:03.542Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-12T12:54:03.554Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-12T12:54:03.569Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-12T12:54:03.569Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-12T12:54:23.778Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-12T12:54:23.788Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-12T12:54:23.805Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-12T12:54:25.167Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-12T12:54:25.197Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-12T12:54:25.795Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-12T12:54:25.795Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-12T12:54:25.795Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-12T12:54:25.799Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"result":{"resources":[{"description":"entity_type values for ElectronicsRead; per-class fields/filters/pagination: resource://mcp.electronics_schema_{class}.","mimeType":"application/json","name":"electronics_entity_types","uri":"r...[9673 chars truncated]..._schema_via","uri":"resource://mcp.electronics_schema_via"},{"description":"electronics.Wire fields, filters, and operators for read queries.","mimeType":"application/json","name":"electronics_schema_wire","uri":"resource://mcp.electronics_schema_wire"}]}} { metadata: undefined }
2026-06-12T12:54:25.800Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-12T23:18:06.632Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-12T23:18:06.633Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-12T23:18:06.633Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-12T23:18:06.664Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-12T23:18:06.709Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-12T23:18:06.709Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T01:44:49.264Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-13T01:44:49.265Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-13T01:44:49.323Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-13T01:44:49.343Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-13T01:44:50.972Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-13T01:44:51.138Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-13T01:44:51.138Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-13T01:44:51.138Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-13T01:44:51.160Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-13T01:44:51.161Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"result":{"resources":[{"description":"entity_type values for ElectronicsRead; per-class fields/filters/pagination: resource://mcp.electronics_schema_{class}.","mimeType":"application/json","name":"electronics_entity_types","uri":"r...[9673 chars truncated]..._schema_via","uri":"resource://mcp.electronics_schema_via"},{"description":"electronics.Wire fields, filters, and operators for read queries.","mimeType":"application/json","name":"electronics_schema_wire","uri":"resource://mcp.electronics_schema_wire"}]}} { metadata: undefined }
2026-06-13T10:35:43.191Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-13T10:35:43.191Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T10:35:43.191Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-13T10:35:43.208Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T10:35:43.233Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-13T10:35:43.233Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T10:35:48.233Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-13T10:35:48.243Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-13T10:35:48.271Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-13T10:35:48.314Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-13T10:35:49.735Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-13T10:35:49.735Z [Autodesk Fusion] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. `console.error('...')` in JavaScript, `print('...', file=sys.stderr)` in python) and it will appear in this log. { metadata: undefined }
2026-06-13T10:35:49.735Z [Autodesk Fusion] [error] Server disconnected. For troubleshooting guidance, please visit our [debugging documentation](https://modelcontextprotocol.io/docs/tools/debugging) { metadata: { context: 'connection', stack: undefined } }
2026-06-13T10:35:49.735Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T10:35:49.735Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T13:46:49.373Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-13T13:46:49.373Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T13:46:50.294Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-13T13:46:50.295Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-13T13:46:50.298Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-13T13:46:50.412Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-13T13:46:50.647Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-13T13:46:50.648Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-13T13:46:50.648Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-13T13:46:50.648Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-13T13:46:50.654Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"error":{"code":-32600,"message":"Session not initialized. Call 'initialize' first."}} { metadata: undefined }
2026-06-13T13:46:50.654Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-13T14:32:02.651Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-13T14:32:02.651Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T14:32:02.651Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-13T14:32:02.661Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T14:32:02.683Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-13T14:32:02.683Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T14:32:07.049Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-13T14:32:07.052Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-13T14:32:07.073Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-13T14:32:08.334Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-13T14:32:08.337Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-13T14:32:08.381Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-13T14:32:08.382Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-13T14:32:08.382Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-13T14:32:08.388Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"result":{"resources":[{"description":"entity_type values for ElectronicsRead; per-class fields/filters/pagination: resource://mcp.electronics_schema_{class}.","mimeType":"application/json","name":"electronics_entity_types","uri":"r...[9673 chars truncated]..._schema_via","uri":"resource://mcp.electronics_schema_via"},{"description":"electronics.Wire fields, filters, and operators for read queries.","mimeType":"application/json","name":"electronics_schema_wire","uri":"resource://mcp.electronics_schema_wire"}]}} { metadata: undefined }
2026-06-13T14:32:08.388Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-13T14:34:02.966Z [Autodesk Fusion] [info] Message from client: {"method":"resources/read","params":{"uri":"resource://mcp.electronics_schema_variant"},"jsonrpc":"2.0","id":3} { metadata: undefined }
2026-06-13T14:34:02.991Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":3,"result":{"contents":[{"description":"electronics.Variant fields, filters, and operators for read queries.","mimeType":"application/json","name":"electronics_schema_variant","text":"{\"entity_type\":\"electronics.Variant\",\"properties\":[{\"name\":\"object_id\",\"type\":\"integer\",\"unit\":\"\",\"description\":\"Variant object ID.\",\"filterable\":true,\"operators\":[\"eq\"]},{\"name\":\"part_object_id\",\"type\":\"integer\",\"unit\":\"\",\"description\":\"ID of the parent part.\",\"filterable\":true,\"operators\":[\"eq\"]},{\"name\":\"value\",\"type\":\"string\",\"unit\":\"\",\"description\":\"Variant value string (e.g. component value).\",\"filterable\":true,\"operators\":[\"eq\"]},{\"name\":\"populate\",\"type\":\"integer\",\"unit\":\"\",\"description\":\"Nonzero if the variant is populated in assembly (1) or DNP (0).\",\"filterable\":true,\"operators\":[\"eq\"]},{\"name\":\"technology\",\"type\":\"string\",\"unit\":\"\",\"description\":\"Variant technology / BOM technology string.\",\"filterable\":true,\"operators\":[\"eq\"]},{\"name\":\"variant_def_object_id\",\"type\":\"integer\",\"unit\":\"\",\"description\":\"ID of the variant definition, if any.\",\"filterable\":true,\"operators\":[\"eq\"]}],\"read\":{\"fields\":\"array of property names; omit for all\",\"filters\":\"array of {property, op, value}; see properties[].operators\",\"pagination\":\"limit (max 1000), offset\",\"coordinate_unit\":\"Properties with unit=\\\"document_grid_unit\\\" are returned in the document's active grid unit (mm, mil, inch, or mic). The actual unit for a query is reported in the response \\\"coordinate_unit\\\" field. Filter values for those properties must also use that unit.\"}}","uri":"resource://mcp.electronics_schema_variant"}]}} { metadata: undefined }
2026-06-13T14:56:13.559Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-13T14:56:13.559Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T14:56:13.559Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-13T14:56:13.569Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T14:56:13.598Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-13T14:56:13.598Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T14:57:38.187Z [Autodesk Fusion] [info] Initializing server... { metadata: undefined }
2026-06-13T14:57:38.188Z [Autodesk Fusion] [info] Using built-in Node.js for MCP server: Autodesk Fusion { metadata: undefined }
2026-06-13T14:57:38.202Z [Autodesk Fusion] [info] Server started and connected successfully { metadata: undefined }
2026-06-13T14:57:39.492Z [Autodesk Fusion] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-11-25","capabilities":{"extensions":{"io.modelcontextprotocol/ui":{"mimeTypes":["text/html;profile=mcp-app"]}}},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
2026-06-13T14:57:39.501Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"capabilities":{"resources":{"listChanged":false,"subscribe":false},"tools":{"listChanged":false}},"protocolVersion":"2025-11-25","serverInfo":{"name":"MCP Server Adapter","version":"1.0.0"}}} { metadata: undefined }
2026-06-13T14:57:39.557Z [Autodesk Fusion] [info] Message from client: {"method":"notifications/initialized","jsonrpc":"2.0"} { metadata: undefined }
2026-06-13T14:57:39.558Z [Autodesk Fusion] [info] Message from client: {"method":"tools/list","params":{},"jsonrpc":"2.0","id":1} { metadata: undefined }
2026-06-13T14:57:39.558Z [Autodesk Fusion] [info] Message from client: {"method":"resources/list","params":{},"jsonrpc":"2.0","id":2} { metadata: undefined }
2026-06-13T14:57:39.580Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":2,"result":{"resources":[{"description":"entity_type values for ElectronicsRead; per-class fields/filters/pagination: resource://mcp.electronics_schema_{class}.","mimeType":"application/json","name":"electronics_entity_types","uri":"r...[9673 chars truncated]..._schema_via","uri":"resource://mcp.electronics_schema_via"},{"description":"electronics.Wire fields, filters, and operators for read queries.","mimeType":"application/json","name":"electronics_schema_wire","uri":"resource://mcp.electronics_schema_wire"}]}} { metadata: undefined }
2026-06-13T14:57:39.580Z [Autodesk Fusion] [info] Message from server: {"jsonrpc":"2.0","id":1,"result":{"tools":[{"description":"Read Fusion Electronics design data (schematic, board, library). Requires an active Electronics document.\n\n=== ENTITY TYPES ===\nPass one of these as \"entity_type\". Omit \"object\" for all rows...[18579 chars truncated]... the last undone operation:\n{\n  \"featureType\": \"redo\"\n}\n","inputSchema":{"properties":{"featureType":{"description":"Type of update","enum":["undo","redo"],"type":"string"}},"required":["featureType"],"type":"object"},"name":"fusion_mcp_update"}]}} { metadata: undefined }
2026-06-13T15:02:49.621Z [Autodesk Fusion] [info] Shutting down server... { metadata: undefined }
2026-06-13T15:02:49.622Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T15:02:49.622Z [Autodesk Fusion] [info] Server transport closed (intentional shutdown) { metadata: undefined }
2026-06-13T15:02:49.637Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }
2026-06-13T15:02:49.638Z [Autodesk Fusion] [info] Server transport closed { metadata: undefined }
2026-06-13T15:02:49.638Z [Autodesk Fusion] [info] Client transport closed { metadata: undefined }

Steps to Reproduce

1. Directory → Connectors → Autodesk Fusion → Install → confirm in the dialog. Button disappears, no toggle, no error.
2. Settings → Extensions → Advanced → "Install Extension…" → select the same .mcpb. Same silent no-op.

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.167 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_