The API layer issues on Windows — page 3
Issues the maintainers labelled both platform:windows and area:api.
400 issues · 32 open · 368 resolved (92%) · first seen Mar 2, 2025
Is this getting better or worse?
This class of problem is still growing. 97 new reports in the last 90 days vs 74 in the 90 before — +31%. The open backlog peaked at 90 in 2025-12 and sits at 32 today.
Derived by counting each matching issue from its creation date until it closed. First-party
computation over the anthropics/claude-code tracker — the trend is not published
anywhere upstream.
Which builds report this
197 of these reports name the Claude Code build they were running, spanning 65 releases. Heaviest reporters:
- Claude Code v2.1.114
- Claude Code v2.1.19
- Claude Code v2.1.29
- Claude Code v2.1.141
- Claude Code v2.1.76
- Claude Code v2.1.104
- Claude Code v2.1.56
- Claude Code v2.1.17
Report volume, not a defect count: an issue can mention a build without that build having caused the failure. Versions come from the version string in the bug-report template, matched against real published tags.
Do these get fixed?
Median time to close is 37 days across 368 closures. Of the 368 closures with a recorded reason, 24% were closed as completed and 279 as not-planned or duplicate. The most recent completed fix landed in 2026-06.
Workarounds reported by the community
47 of these issues post a workaround someone says worked. The highest-engagement ones:
- [Bug] VS Code extension: Tool use concurrency error after Jan 23-24 update
- ✅ WORKAROUND FOUND The fix: Install VS Code extension version 2.1.17 while keeping CLI at 2.1.19 Steps: 1. In VS Code, go to Extensions 2. Find "Claude Code for VS Code" 3. Click the dropdown arrow next to Uninstall → "I…
Found in the thread of #20571 · still open - [Bug] Anthropic API Error: Tool Use Concurrency Limitation
- I tried many workaround without success. In my case, it was a specific PDF file causing the issue. Once unreferenced, it works.
Found in the thread of #9002 · resolved - [BUG] API Error: Rate limit reached despite Claude Max subscription and only 16% usage
- …nType: null and rateLimitTier: null. API credits were added as a workaround — they were consumed instantly (within seconds), leaving the account in debt. After fresh login subscription is recognized (subscriptionType: "m…
Found in the description of #29579 · still open - [BUG] Cowork Windows - Cannot connect to Claude API from workspace (Windows 11 Home)
- …same issue on Windows 11 Pro. Tried all of the recommended work-arounds and get the same result
Found in the thread of #24918 · resolved - [BUG] API Error: Server is temporarily limiting requests (not your usage limit) · Rate limited
- I have discovered a workaround - if you sign up for the GPT Codex Plan, you get a better coding agent and limits that are actually reflective of use. Solved my problem 100%.
Found in the thread of #53915 · still open
Excerpts are quoted from the linked issue so you can judge relevance before opening it. Threads that only ask for a workaround, or report that there is none, are excluded. These are community suggestions, not official guidance from Anthropic — read the full thread before applying one.
Matching issues 201–300
Ranked by community engagement (reactions weighted over comments). Listing the top 300 of 400 matches; the statistics above cover all 400.
- [BUG] Rate limit triggered incorrectly on Max Plan with 0% usage
- [Bug] Anthropic API Error: Rate limit reached on Pro account without active API key
- [BUG] Session permanently stuck on rate limit after reading many image files - unrecoverable
- [BUG] Getting error 400.
- Bug: Rate limit blocks entire conversation session on Claude Code Max plan
- [Bug] Anthropic API Error 400 during extended thinking with MCP tools
- [BUG] API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"This organization has been disabled."},"request_id":"req_011CXF1SZ3S3oXChsdxhoUwV"}
- [Bug] Anthropic API timeout: Models unresponsive with excessive tool call delays
- [BUG] 20-70% of concurrently ran chats fail to provide usage data and stream events
- [Bug] Claude API responses truncating mid-response
- [BUG] Claude Code Extension in VS Fails
- [Bug] Anthropic API Error: Internal Server Error (500)
- [BUG] System prompt ignored when using --system-prompt together with --continue/--resume
- [BUG] Cant resume chat [API error 400]
- [BUG] claude with model sonnet[1m] doesn't work on a max 20x account
- [Bug] Anthropic API Error: Service Overloaded
- Cant't connect to Anthropic services when running command "claude" in the command line of WIN11
- Bug Report Input buffer contains unsupported image format
- [Bug] Anthropic API Error: Server Rate Limiting - Temporary Request Limit
- [Bug] Anthropic API Error: Server Rate Limiting - Requests Temporarily Blocked
- Billing-header nonce (`cch`) in system prompt breaks prompt caching on third-party providers
- [Bug] Anthropic API Error: False positive validation for biological structure queries
- [BUG]
- Opus 4.7 stream stall after Thinking step, UI surfaces misleading "missing file access" error
- [BUG] Latest version
- [BUG]
- [Bug] Anthropic API Error: Could not process image
- You've hit your limit · resets Apr 17, 7pm (Asia/Riyadh)
- [Bug] Anthropic API Error: Internal Server Error (500)
- [BUG] API Error 500
- [BUG] [VSCode Extension] Unsupported content type: redacted_thinking when using OpenRouter
- UNWARRANTED "API Error: Rate limit reached" WARNING
- [Bug] Anthropic API Error: Rate limit reached with Claude Max model
- [Bug] Anthropic API Error: Internal Server Error (500)
- MCP Chrome extension: frequent transient API Error 500 during tool calls
- [BUG] Nonstop API Error: 500
- [BUG] Frequent API Error 500 in Claude Code (claude-opus-4-6) - Unable to work
- API Error: 500 {"type":"error","error":{"type":"api_error","message":"Internal server error"},"request_id":"req_011CYVAV5oVRUaYx6n3g4noM"}
- /gsd:progress and file write operations trigger recurring 500 Internal Server Error from Anthropic API
- Output blocked by content filtering policy - false positive when generating LICENSE (BSL 1.1) and API documentation
- [Bug] Anthropic API Error: Invalid message content after agent interruption
- [BUG] Claude code generate an incorrect "additionalProperties": {} field for ExitPlanMode tool
- [Feature Request] Add support for alternative AI models alongside Claude
- [BUG] It refuses your filter to make me at manage country flags based on user ip
- [BUG] > API Error: 400 | This credential is only authorized for use with Claude Code and cannot be used for other API requests.
- [Bug] Unsupported SVG media type in conversation history with Figma MCP assets
- PDF reading fails with 'tool_use ids without tool_result blocks' error
- [Bug] Anthropic API Error: Unexpected Tool Use Parsing Failure
- [Bug Report: Unspecified Error Condition]
- [Bug] Claude Code: Incorrect Feature Generation Behavior
- [BUG] UNABLE_TO_GET_ISSUER_CERT_LOCALLY
- [Bug] Anthropic API: Generating Nonexistent Tool Names
- [Bug] Anthropic API Error: Server Overloaded (500)
- [Bug] setup-token forces incorrect error: 5-hour limit reached ∙ resets 3am
- "MongoDB Maintenance Operations Blocked - Critical Policy Issue"
- [Bug] Anthropic API Error: Missing Tool Result Block for Tool Invocation
- [Bug] Anthropic API: Unexpected Usage Limit Error
- [Bug] Anthropic API Error: Unexpected False Positive AUP Violation
- Bug Report all messages must have non-empty content except for the optional final assistant message
- Bug Report
- Anthropic API Request Blocked by Content Filtering Policy
- 5-hour limit reached ∙ resets 11pm
- Invalid Model Name Length in Anthropic API Request
- Bug Report: Anthropic API Error - Missing Tool Result Block in Claude Code Response Handling
- Missing Tool Result Block for Tool Use ID toolu_01C8jdoH7EFeLasm48ru4qhi
- Super Slow Token Output Minimal Compute it Seems Like
- [Bug] Anthropic API Error: Server Rate Limiting During Request Execution
- [Bug] Anthropic API Error: Rate Limited - Server Temporarily Limiting Requests
- [Bug] Anthropic API Error: Server rate limiting during request processing
- [Bug] Anthropic API Error: Server rate limiting requests
- [BUG] Unable to connect to API (ConnectionRefused)
- [BUG] DUPLICATES: #16159 -- API Error: Output blocked by content filtering policy when attempting to write CODE_OF_CONDUCT.md
- [BUG] Failed to use fast mode in opus 4.7 when using LLM Gateway
- BULLSHIT safety guardrails on PAID MAX PLAN for routine structural biology [Bug] Anthropic API Error: Unexpected failure during task execution
- critical scientific work blocked in mid-context, completely destroying the work developed in the context.
- streams ending mid-response with had_error=true across multiple repos (2.1.141.650)
- [BUG] VS Code Claude OPUS Runtime bug
- [Bug] Default output token limit (32k) causes mid-session failures and poor token utilization for extended tasks
- [BUG] API Error 400 - MCP tool schema uses oneOf/allOf/anyOf at top level
- [BUG] Dispatch API Error: 400
- You've hit your limit · resets 9pm (Asia/Dubai)
- [BUG]
- [Bug] Anthropic API Error: HTTP 500 Server Error
- Claude is working much slower, small tokens limit
- [Bug] Anthropic API Error: Internal Server Error (500)
- [Bug] Anthropic API Error: Internal Server Error (500)
- [Bug] Anthropic API Error: Output blocked by content filtering policy on benign markdown file updates
- [BUG] API Limit: Error on Claude Code Cursor, without even using the Usage Limit
- [BUG] I am instantly hitting an "API Error: Rate Limit Reached" when I start a new conversation with Claude Code. This occurred after enabling "Fast Mode" with Opus.
- [Bug] Anthropic API Error: Internal Server Error (500)
- [BUG] API Error: Rate limit reached on Opus 4.6 with Claude Max — Sonnet works fine, fresh session, 6% usage
- [BUG] API Error: 500 on web and code
- [BUG] Content filter falsely blocks transcription of 1986 agricultural newsletter
- API Error 500 - Internal server error affecting all chats
- Bug Report
- [BUG]
- [BUG] I found that asking specific questions would lead to API Error: Connection error.
- [Bug] Anthropic API Error: Exception thrown when running /context
- [BUG] Anthropic API Error: context_management, Extra inputs are not permitted
- [Bug] Anthropic API Error: Cannot modify thinking blocks in assistant message during compaction