Claude Code / AI Coding Tools
MCP Server OAuth Authentication Failure — Invalid Scope Error
Fix MCP server OAuth authentication failures where valid configs work in Claude Code client but fail on specific third-party MCP servers (e.g., Datadog invalid_scope) Includes evidence for Claude Code troubleshooting demand.
- Category
- AI Coding Tools
- Error signature
Datadog MCP OAuth fails with invalid_scope error (works in Claude Code with identical config)- Quick fix
- Verify the account session, API key, provider settings, and environment where the failing tool is running.
- Updated
What this error means
Datadog MCP OAuth fails with invalid_scope error (works in Claude Code with identical config) is a Claude Code failure pattern reported for developers trying to fix mcp server oauth authentication failures where valid configs work in claude code client but fail on specific third-party mcp servers (e.g., datadog invalid_scope). Based on the imported evidence, treat this as a tool-specific troubleshooting page rather than a generic API error.
Why this happens
Factory-AI/factory GitHub Issue #1086 (created 2026-05-05) reports Datadog auth failing with invalid_scope error specifically for MCP OAuth flow, even with identical config that works in Claude Code native integration. mapbox/mcp-devkit-server Issue #114 (created 2026-05-15) reports inability to authenticate hosted endpoint via Claude Code. Multiple MCP OAuth integration issues being reported across repos. Category: AI Coding Tools per mapping rules. High growth area as more teams adopt MCP.
Common causes
- Factory-AI/factory GitHub Issue #1086 (created 2026-05-05) reports Datadog auth failing with invalid_scope error specifically for MCP OAuth flow, even with identical config that works in Claude Code native integration. mapbox/mcp-devkit-server Issue #114 (created 2026-05-15) reports inability to authenticate hosted endpoint via Claude Code. Multiple MCP OAuth integration issues being reported across repos. Category: AI Coding Tools per mapping rules. High growth area as more teams adopt MCP.
Quick fixes
- Confirm the exact error signature matches
Datadog MCP OAuth fails with invalid_scope error (works in Claude Code with identical config). - Check the Claude Code account, local tool state, and provider configuration involved in the failing workflow.
- Verify the account session, API key, provider settings, and environment where the failing tool is running.
Platform/tool-specific checks
- Verify the command, editor, extension, or API client that produced the error.
- Compare local settings with CI, deployment, or editor-level settings when the error appears in only one environment.
- Avoid deleting credentials, local model data, or project settings until the failing scope is clear.
Step-by-step troubleshooting
- Capture the exact error message and the command, editor action, or request that triggered it.
- Check whether the failure is account/auth, quota/rate, model/provider, local runtime, or deployment configuration.
- Review the source evidence below and compare it with your environment.
- Apply one change at a time and rerun the smallest failing action.
- Keep the working fix documented for the team or deployment environment.
How to prevent it
- Keep provider/tool configuration documented.
- Record non-secret diagnostics such as tool version, provider name, model name, and command path.
- Add a lightweight check before CI or production workflows depend on the tool.
Sources checked
- https://github.com/Factory-AI/factory/issues/1086
- https://github.com/mapbox/mcp-devkit-server/issues/114
Evidence note: Factory-AI/factory GitHub Issue #1086 (created 2026-05-05) reports Datadog auth failing with invalid_scope error specifically for MCP OAuth flow, even with identical config that works in Claude Code native integration. mapbox/mcp-devkit-server Issue #114 (created 2026-05-15) reports inability to authenticate hosted endpoint via Claude Code. Multiple MCP OAuth integration issues being reported across repos. Category: AI Coding Tools per mapping rules. High growth area as more teams adopt MCP.
Related errors
- AI Coding Tools
FAQ
What should I check first?
Start with the exact Datadog MCP OAuth fails with invalid_scope error (works in Claude Code with identical config) text and the smallest action that reproduces it.
Can I ignore this error?
No. Treat it as a failed Claude Code workflow until the root cause is understood.
Is this guaranteed to have one fix?
No. The imported evidence supports the troubleshooting path above, but tool behavior can vary by account, plan, version, provider, and local configuration.
How do I know the fix worked?
Rerun the same command, editor action, or request. The fix is working when that action completes without Datadog MCP OAuth fails with invalid_scope error (works in Claude Code with identical config).