[BUG] get_network_request only OPTIONS preflight requests instead of actual GET requests

[Sayvai]

Description of the bug

Description

The MCP tool get_network_request appears to only return OPTIONS (🔴) preflight requests instead of the intended and verified counterpart GET (🟢 ) requests, where my intention was to extrapolate the response payload data with which OPTIONS preflight requests do not contain.

I attach terminal output summary snippets for reference:

# LLM Summary

The Chrome DevTools MCP tool seems to be consistently returning the OPTIONS preflight request (204) instead of the actual GET request with data (200).

# My guidance prompt

there should be an alternative HTTP request method `GET + Preflight`. See screenshot '/Users/...'

# LLM Summary

The issue is that the Chrome DevTools MCP tool's get_network_request is returning the preflight OPTIONS request instead of the actual GET request

🖼️ Screenshot of Partial LLM Conversation

Reproduction

1. Use Claude Code CLI agent (Sonnet 4.5)
2. Prompt > Open a chrome page on http://localhost:3000/....
3. Prompt > Get network response payload for "http://localhost:3000/..."
4. Prompt Response > `The issue is that the Chrome DevTools MCP tool's get_network_request is returning the preflight OPTIONS request instead of the actual GET request. 🔴

Expectation

get_network_request MCP tool to return GET request response payload data.

MCP configuration

Claude Code 2.0.19 - Sonnet 4.5

{
  "mcpServers": {
    "chrome-devtools": {
      "command": "npx",
      "args": [
        "chrome-devtools-mcp@latest"
      ]
    },
  }
}

Node version

20.19.3

Chrome version

141.0.7390.67

Coding agent version

Claude Code 2.0.19 - CLI

Model version

Sonnet 4.5

Chat log

See issue description

Operating system

macOS

Extra checklist

• I want to provide a PR to fix this bug

[OrKoN]

This would be already fixed by the next release #382 cc @Lightning00Blade

[Sayvai]

@OrKoN That's brilliant, and very timely!

I can verify and test this out in the wild when this is to be released in version 0.9.0 🧪🧑‍🔬

[OrKoN]

This should be addressed in the latest release (v0.9.0). If there are further improvements possible, please file a new issue.

[Sayvai]

I can verify that since release 0.9.0, I am now seeing the MCP tool output the request and response payload data for the appropriate request methods (e.g. GET and POST) 🎉

This will tremendously help with seamless debugging experience with our local AI agents.