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Developer using Claude Code web (claude.ai/code) wants GitHub MCP tools to access private repositories but OAuth login flow silently breaks or returns inconsistent results Includes evidence for Claude Code troubleshooting demand.
[BUG] GitHub MCP OAuth flow fails on claude.ai/code web client — inconsistently provides GitHub MCP tools for private repos Fix Claude Code accidentally charging via API console billing instead of claude.ai Max subscription; stop unauthorized API charges Includes evidence for Claude Code troubleshooting demand.
keeps defaulting auth to Anthropic Console API billing account instead of claude.ai Max subscription; costs hundreds of dollars in unexpected API spend Fix 400 error caused by invalid Unicode surrogate pair in large JSON request body sent to Anthropic/Claude API Includes evidence for Claude Code troubleshooting demand.
API Error: 400 The request body is not valid JSON: no low surrogate in string: line 1 column 195621 (char 195620) Fix OAuth token exchange failure when Claude Code connects to remote MCP server behind Cloudflare Access SaaS Includes evidence for Claude Code troubleshooting demand.
OAuth Token Exchange not completed in 2.1.143 with non-DCR AS (Cloudflare Access for SaaS) Fix claude plugin install corrupting .claude.json config and losing subscription state, triggering endless OAuth prompts Includes evidence for Claude Code troubleshooting demand.
claude plugin install silently strips fields from .claude.json (~75 KB → ~1.5 KB), dropping oauthAccount.organizationType and forcing re-OAuth MCP server launches but dies before responding. Developer needs to diagnose why child process exits (missing binary, Node.js init completes with no event-loop work, npx path issues on Windows). Includes evidence for Claude Code troubleshooting demand.
Connection closed (Picking well-maintained servers avoids a lot of this...) — MCP stdio process died between connect and first tools/list response Developer running long autonomous Claude Code sessions hits sudden 401 auth failures; needs recovery procedure (/logout then /login, cache clearing, fresh token lifecycle management). Includes evidence for Claude Code troubleshooting demand.
authentication_error (401) — OAuth token expired mid-autonomous run, every subsequent tool call returns auth error until re-login Developer configures an MCP server for Claude Code but it immediately fails with -32000; needs systematic troubleshooting steps (command isolation, env vars, stdout pollution, Node.js event loop). Includes evidence for Claude Code troubleshooting demand.
Connection closed / MCP server <name>: error -32000 — generic JSON-RPC server error indicating MCP subprocess crashed during init Resolve spurious usage limit error messages on Claude Code Max plan when user hasn't actually hit their rate or usage limits Includes evidence for Claude Code troubleshooting demand.
False 'Extra usage required for 1M context' / 'Usage limit reached' error with no actual limits hit Investigate and fix unexpected rapid quota depletion on Claude Code Max plan where the 5-hour window appears to expire in only 5 minutes Includes evidence for Claude Code troubleshooting demand.
max plan 5h usage filled 0-100% in just 5 minutes after refresh — apparent rapid quota drain without proportional activity Fix incorrect billing where Opus 4.6 cached read tokens are charged at full input rate instead of discounted cache-hit rate on Claude Code Max plan Includes evidence for Claude Code troubleshooting demand.
cache_read tokens counted at full rate despite cache hits on Max 20x — billing system not applying discounted cache read pricing Fix missing rate_limits field in Claude Code statusLine JSON output for OAuth Pro authenticated first-party users on v2.1.141 Includes evidence for Claude Code troubleshooting demand.
rate_limits field still missing/null from statusLine JSON on 2.1.141 (OAuth Pro, firstParty) Find why Claude Code usage counter jumps from 64% to 100% automatically when no prompts are being sent or tasks are actively running Includes evidence for Claude Code troubleshooting demand.
Usage tracking bug: quota increased from 64% to 100% with no active tasks running Debug abnormally high token/usage consumption where each prompt triggers a 30% jump in session usage instantly upon submission Includes evidence for Claude Code troubleshooting demand.
session usage jumped 30% per prompt in less than 1 minute of entering the prompt — abnormal token consumption spike Developers unable to create files via Claude Code due to EACCES permission errors; often related to MCP server configuration or multi-user environments. Includes evidence for Claude Code troubleshooting demand.
[BUG] Claude commands fail with EACCES permission denied error when creating files User needs to maintain Claude Code sessions without being killed by sudden API usage limits; looking for tools or configurations to extend session lifetime and avoid unexpected interruption Includes evidence for Claude Code troubleshooting demand.
Claude Code stops working or crashes due to new Anthropic usage limits and rate caps; requires workaround tool (engram) to bypass or manage quota restrictions Fix Claude Code 401 auth failure caused by expired OAuth token without re-login Includes evidence for Claude Code troubleshooting demand.
HTTP 401 authentication_error mid-session — OAuth token expired or revoked, every subsequent tool call returns authentication_error Resolve Claude Code 529 overloaded error during peak hours or Opus Max usage Includes evidence for Claude Code troubleshooting demand.
API Error: 529 {"type":"overloaded_error"} — Anthropic capacity saturated for requested model Fix Claude Code MCP server crash (-32000) preventing external tool connections Includes evidence for Claude Code troubleshooting demand.
MCP -32000 Client Closed — MCP server process dies on launch 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