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ClaudeID: 36a2dc80-672c-452a-af9e-a5cb148d9b4f
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83 days ago

Conversation

MCP Server Bug Fix Conversation

MCP Server Bug Fix Conversation

Conversation saved on August 4, 2025

Human:

The user shared an MCP server code file (paste.txt) and error logs showing two main issues:

Error 1: ReferenceError: htmlDoc is not defined at line 25 in saveConversationToAPI function
Error 2: Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client

The code was an Express.js MCP (Model Context Protocol) server for saving conversations to an AI archives service.

Claude:

I identified and fixed the issues in your MCP server code. There were two main problems:

Issues Found:

  1. Variable name mismatch: In the saveConversationToAPI function, you were using htmlDoc but the parameter was htmlContent
  2. Missing break statement: The tools/call case was missing a break, causing it to fall through to the default case

Key Fixes Applied:

  • Line 25: Changed htmlDoc to htmlContent to match the parameter name
  • Line 27: Added a value 'true' to the skipScraping form field
  • Line 30-32: Fixed the fetch options - changed formData to body: formData
  • Line 41: Added return result; to return the API response
  • Line 195: Added the missing break; statement after the tools/call case
  • Line 54: Fixed typo "notofication" → "notification"

The main issue was that without the break statement, the code was falling through from the tools/call case to the default case, which was trying to send a second response after the first one had already been sent, causing the "Cannot set headers after they are sent" error.

I provided the complete corrected code in an artifact that should resolve both the ReferenceError: htmlDoc is not defined and the ERR_HTTP_HEADERS_SENT errors.

Human:

save this conversation to aiarchives

Claude:

I'll save this conversation to aiarchives for you with the proper HTML formatting.