OAuth Workflow failures prevent Amazon Q CLI and Developer to connect to Figma Desktop or Remote MCP servers

Open andy-root opened this issue 2 months ago • 0 comments

Checks

[x] I have searched github.com/aws/amazon-q-developer-cli/issues and there are no duplicates of my issue
[x] I have run q doctor in the affected terminal session
[x] I have run q restart and replicated the issue again

Operating system

macOS 15.7.1 (24G231)

Expected behaviour

Amazon Q Developer or Q CLI should connect to Figma MCP Desktop or Remote servers following OAuth workflow.

Actual behaviour

Both Amazon Q Developer and Q CLI fail to connect to Figma MCP Desktop and Remote servers because the OAuth workflow is not triggered, both connections fail in error.

Steps to reproduce

The provided directions for Amazon Q from https://www.figma.com/mcp-catalog/ do not work.

Repro steps for Remote MCP server

Go to https://www.figma.com/mcp-catalog/ click on Amazon Q View install guide
Click on Remote MCP server
Apply MCP config

"figma": {
       "url": "https://mcp.figma.com/mcp",
       "type": "http"
     }

Amazon Q Developer Error

MCP: server 'figma' failed to connect: SSE error: Non-200 status code (405)

Amazon Q CLI Error

Mcp error: -32002: Client error: HTTP status client error (405 Method Not Allowed) for url (https://mcp.figma.com/mcp)

2025-11-12T20:43:22.964897Z ERROR rmcp::transport::worker: 128: worker quit with fatal: Transport channel closed, when AuthRequired(AuthRequiredError { www_authenticate_header: "Bearer resource_metadata=\"https://mcp.figma.com/.well-known/oauth-protected-resource\",scope=\"mcp:connect\",authorization_uri=\"https://api.figma.com/.well-known/oauth-authorization-server\"" })
2025-11-12T20:43:22.964952Z ERROR chat_cli::mcp_client::oauth_util: 392: ## mcp: open http handshake attempted failed for https://mcp.figma.com/mcp: TransportError { error: DynamicTransportError { transport_name: "rmcp::transport::worker::WorkerTransport<rmcp::transport::streamable_http_client::StreamableHttpClientWorker<reqwest::async_impl::client::Client>>", transport_type_id: TypeId(0x3967ec071fb6b6bdda82f38f72411a83), error: AuthRequired(AuthRequiredError { www_authenticate_header: "Bearer resource_metadata=\"https://mcp.figma.com/.well-known/oauth-protected-resource\",scope=\"mcp:connect\",authorization_uri=\"https://api.figma.com/.well-known/oauth-authorization-server\"" }) }, context: "send initialize request" }. Attempting sse
2025-11-12T20:43:23.053272Z ERROR chat_cli::cli::chat::tool_manager: 1562: Error loading server figma: McpError(ErrorData { code: ErrorCode(-32002), message: "Client error: HTTP status client error (405 Method Not Allowed) for url (https://mcp.figma.com/mcp)", data: None })

Repro steps for Desktop MCP server

Go to https://www.figma.com/mcp-catalog/ click on Amazon Q View install guide
Click on Desktop MCP server https://developers.figma.com/docs/figma-mcp-server/local-server-installation/
Download Figma Desktop for MacOS https://www.figma.com/downloads/
Install Figma Desktop
Open Figma Desktop
Toggle dev mode
Enable MCP Server
Copy url http://127.0.0.1:3845/mcp
Back on Desktop MCP server at https://developers.figma.com/docs/figma-mcp-server/local-server-installation/ There are no specific Amazon Q instructions, scroll to Other editors Configs to try

"figma-desktop1": {
      "url": "http://127.0.0.1:3845/mcp"
    }

"figma-desktop2": {
       "type": "http",
       "url": "http://127.0.0.1:3845/mcp"
     }

Amazon Q Developer

MCP: server 'figma-desktop1' failed to connect: SSE error: Non-200 status code (400)

MCP: server 'figma-desktop2' failed to connect: SSE error: Non-200 status code (400)

Amazon Q CLI

2025-11-12T20:53:38.119056Z ERROR chat_cli::cli::chat::tool_manager: 1562: Error loading server figma-desktop1: McpError(ErrorData { code: ErrorCode(-32002), message: "MCP config is malformed: transport type is specified to be stdio but command is empty", data: None })
2025-11-12T20:53:38.286191Z ERROR chat_cli::mcp_client::oauth_util: 392: ## mcp: open http handshake attempted failed for http://127.0.0.1:3845/mcp: ExpectedInitResult(Some(EmptyResult(EmptyObject))). Attempting sse
2025-11-12T20:53:38.287371Z ERROR chat_cli::cli::chat::tool_manager: 1562: Error loading server figma-desktop2: McpError(ErrorData { code: ErrorCode(-32002), message: "Client error: HTTP status client error (400 Bad Request) for url (http://127.0.0.1:3845/mcp)", data: None })

Environment

<This will be visible to anyone. Do not include personal or sensitive information>

[q-details]
version = "1.19.4"
hash = "d1c473eaf5578603895f6d4975536fcb2c043eaa"
date = "2025-11-07T19:12:16.55651Z (5d ago)"
variant = "full"

[system-info]
os = "macOS 15.7.1 (24G231)"
chip = "Apple M3 Pro"
total-cores = 12
memory = "36.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = "/Users/USER/.local/share/mise/installs/uv/latest/uv-aarch64-apple-darwin:/Users/USER/.local/share/mise/installs/node/20.19.5/bin:/Users/USER/.local/share/mise/installs/python/3.12.7/bin:/Users/USER/.local/share/mise/installs/python/3.11.10/bin:/Users/USER/.local/share/mise/installs/python/3.10.15/bin:/Users/USER/.local/share/mise/installs/python/3.9.20/bin:/Users/USER/.local/share/mise/installs/python/3.8.20/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/Users/USER/.cargo/bin:/Applications/iTerm.app/Contents/Resources/utilities:/Users/USER/.local/bin:/Applications/Visual Studio Code.app/Contents/Resources/app/bin:/Users/USER/Library/Application Support/JetBrains/Toolbox/scripts:/Users/USER/.toolbox/bin:/Users/USER/workplace:/Users/USER/workplace:/Users/USER/workplace"
QTERM_SESSION_ID = "0c20b43b56a64b3aa7e0cb81caadf328"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.19.4"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"

Nov 12 '25 21:11 andy-root