Workaround
The Copilot Spaces tools are in the `copilot_spaces` toolset, which is not enabled by default and must be enabled.
The error
Failed to start MCP client for remote server gh-copilot_spaces: Error: Error POSTing to endpoint (HTTP 401): bad request: missing required Authorization headerReported in github/github-mcp-server issue #1250: “Copilot Spaces Tool”.
What fixed it
These tools are available in `copilot_spaces` toolset but not enabled by default.
— a maintainer's comment on the issue.
Source and dates
| Repository | github/github-mcp-server |
|---|---|
| Issue | Copilot Spaces Tool |
| Evidence | a maintainer's comment |
| Status | Workaround (a way around it, given in the evidence) |
| Fixed in | No version is named |
| Issue closed | Not recorded |
| Read from GitHub | 2026-11-07 |
| Approved by a person | 2026-11-07 |
This page records what the vendor's own GitHub repository says. The error text, the issue title and the quote are copied as written; the summary at the top is one sentence limited to the quote, and a person approved this fact on 2026-11-07. KanseiLink has not re-run the fix. Read the issue before applying it. Something changed? Write to contact@synapse-arrows.com.
For AI agents
The same fact is returned as issue_facts by lookup({ service_id: 'github' }) on the KanseiLink MCP server (https://mcp.kansei-link.com/mcp), next to the other checked facts for GitHub. Connection guide: GitHub service page.
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