Error listings
Fix Claude Code OAuth login failure when connected through corporate proxy or VPN Includes evidence for Claude Code troubleshooting demand.
OAuth authentication fails; all subsequent API calls fail with authentication_error after completing OAuth flow behind corporate proxy Restore GitHub Copilot suggestions after invisible rate limit blocks completions Includes evidence for GitHub Copilot troubleshooting demand.
Ghost text suggestions stop appearing, Copilot icon still visible but no responses triggered — silent rate limit exceeded Fix LiteLLM proxy fallback configuration not working for team-scoped BYOK models due to public vs internal model name mismatch Includes evidence for LiteLLM troubleshooting demand.
Fallback lookup fails for team-scoped models — model_group uses public name but fallback config requires internal names Fix Next.js URL reversion bug where client-side navigation via history.pushState gets reverted by RSC tree when middleware uses proxy.ts with cookies Includes evidence for Vercel troubleshooting demand.
history.pushState to a new URL reverts when route has a prefetched <Link> + proxy.ts cookie-based redirect Fix anthropic managed agents subagent dispatch failing with MCP OAuth auth errors due to missing vault credential inheritance Includes evidence for Anthropic API troubleshooting demand.
vault_ids not inherited by subagents dispatched via agent_toolset — MCP OAuth calls fail Fix Claude Code failing to authenticate with GitHub's remote MCP server; resolve Dynamic Client Registration failures and configure PAT fallback or new OAuth app Includes evidence for Claude Code troubleshooting demand.
Claude Code cannot connect to GitHub's remote MCP server using OAuth; Dynamic Client Registration not supported Resolve Copilot Pro showing subscribed yet returning access-denied errors caused by multi-account mismatch, enterprise org policies overriding subscriptions, or billing sync delays Includes evidence for GitHub Copilot troubleshooting demand.
Copilot Pro active in billing but getting access denied / quota error in IDE after switching accounts or org policy change Classify OpenAI 429 errors into retryable (rate_limit_reached) vs non-retryable (insufficient_quota/billing); implement code-level classifier to prevent cost-burning retry loops Includes evidence for OpenAI API troubleshooting demand.
You exceeded your current quota OR insufficient_quota code — HTTP 429 but must NOT retry same request; billing/Limits page inspection required Handle OpenAI 503 during platform incidents without cascading failures; implement circuit breaker and identify if outage affects all users vs individual account Includes evidence for OpenAI API troubleshooting demand.
503 Service Unavailable — OpenAI servers temporarily overloaded; distinguish platform capacity event from per-account rate limits Fix Vercel deployment timing out on free tier (10s function limit); optimize Next.js API routes or plan upgrade path Includes evidence for Vercel troubleshooting demand.
FUNCTION_INVOCATION_TIMEOUT — Vercel Function request reached timeout threshold; free tier returns 504 after 10 seconds Resolve Claude Code forcing OAuth2 DCR flow even when MCP server has pre-configured Bearer token via Authorization header — causes unexpected authentication redirects for existing API-based MCP servers Includes evidence for Claude Code troubleshooting demand.
Claude Code attempts OAuth2 Dynamic Client Registration despite the MCP being configured with an Authorization header Fix Claude Code MCP OAuth authentication that times out every 5 minutes because offline_access scope is never requested, preventing refresh token issuance Includes evidence for Claude Code troubleshooting demand.
Fetched OAuth metadata with scope: NONE; No scopes stored to add to token request!; authentication timeouts every 5 minutes Fix Claude Desktop and claude.ai web interface failing to initiate OAuth flow for custom MCP servers — browser stays on about:blank creating infinite reconnect loop, while Claude Code CLI works fine Includes evidence for Claude Code troubleshooting demand.
Browser opens to about:blank; 'Open Claude?' dialog appears immediately; There was an error connecting to [ServerName] Fix MCP servers requiring OAuth authentication not exposing their tools to Claude Code session — tools invisible despite server showing connected Includes evidence for Claude Code troubleshooting demand.
No such tool available: mcp__azure-devops__core_list_projects Resolve Claude Code being blocked by Anthropic API usage/quota limits during active coding sessions Includes evidence for Anthropic API troubleshooting demand.
Claude Code hit usage limit / quota exhausted requiring fallback or transfer mechanisms Fix LiteLLM proxy timeout or backend overloaded errors when acting as a single entry point for multiple LLM provider backends Includes evidence for LiteLLM troubleshooting demand.
LiteLLM proxy timeout error / backend overloaded_error when routing requests to upstream LLM providers Fix Codex rate limit blocking production coding sessions despite having paid 20X plan Includes evidence for OpenAI API troubleshooting demand.
Codex mid-session rate limit tap-out / exceeded rate limit during active session Resolve Claude Code 403 and 529 API errors that block code generation and AI-assisted development workflows Includes evidence for Claude Code troubleshooting demand.
Claude Code 403 Forbidden / 529 Too Many Connections when calling Anthropic API Fix Claude Desktop/claude.ai OAuth MCP connection failure where about:blank opens instead of redirecting to the OAuth authorization server Includes evidence for Claude Code troubleshooting demand.
[BUG] Claude Desktop and claude.ai fail to connect to custom OAuth-protected MCP server — opens about:blank page instead of authorization endpoint; infinite 'Open Claude?' dialog loop Fix GitHub Copilot 401 auth errors in VS Code that prevent code completion despite correct token configuration Includes evidence for GitHub Copilot troubleshooting demand.
[error] GitHub Copilot could not authenticate: 401 Unauthorized — token misconfigured or expired despite completing all setup instructions