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log-reader-mcp

by ankit-jhajhria
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log-reader-mcp

MCP server for Claude Code — lets Claude start, monitor, search, and detect errors in logs from any project, even ones that don't write log files.

Requirements: Python 3.8+, Claude Code

Install (one-line, any machine)

SSH (if you have GitHub SSH keys set up):

git clone git@github.com:ankit-jhajhria/log-reader-mcp.git ~/.claude/mcp-servers/log-reader && bash ~/.claude/mcp-servers/log-reader/setup.sh

HTTPS (works without SSH keys):

git clone https://github.com/ankit-jhajhria/log-reader-mcp.git ~/.claude/mcp-servers/log-reader && bash ~/.claude/mcp-servers/log-reader/setup.sh

Restart Claude Code after install.

Ubuntu/Debian users: If setup fails with a venv error, run sudo apt install python3-venv first — the script will tell you this too.

Related MCP server: Log Analyzer MCP Server

How to use in a new session

Project with no log files (Node, Go, Rust, plain Python, etc.)

Open Claude Code in your project and say:

run "node server.js" and capture the logs

Claude starts the server in the background, captures all terminal output, and tails the log immediately. Always set the working directory so the command runs from the right folder:

run "npm start" in /home/user/my-node-project and capture the logs

To check for problems:

detect errors in the captured log

To restart after a code change:

restart the server

To stop it:

stop the server

Project that already writes log files (Django, Rails, etc.)

tail logs/debug.log
detect errors in logs/debug.log
search logs/debug.log for "Traceback" with 3 lines of context
show me new lines in logs/debug.log since line 400

Don't know where the logs are

list log files in the logs folder

Files modified in the last 60 seconds are marked [active] so you can spot the right one instantly.

All tools

Process management

Tool

What it does

run_and_capture(command, cwd, log_file)

Start any server in background, capture all output to a file

list_captured_processes()

Show all running/stopped captured processes

stop_process(pid)

Stop a process

restart_process(pid)

Stop and restart with the same command and working directory

Log reading

Tool

What it does

detect_errors(path, last_lines)

Auto-scan for ERROR, Exception, Traceback, WARNING, CRITICAL, fatal

tail_file(path, lines=80)

Last N lines of any log file

get_new_lines(path, after_line)

New lines since line N — use to poll a running server

search_log(path, pattern, context_lines)

Regex/string search with optional surrounding context lines

list_log_files(directory, pattern)

List log files with sizes and active status

file_info(path)

Size, modified time, line count

Troubleshooting

python3-venv error on Ubuntu/Debian:

sudo apt install python3-venv

Permission denied reading a log file: Some system logs (e.g. /var/log/syslog) require elevated permissions. Run Claude Code with sudo or copy the log to a readable location.

Process exits immediately after run_and_capture: The tool detects this and shows you the output. Common causes: wrong command, port already in use, missing dependencies. Fix the command and try again.

This server cannot be installed

F
license - not found
-
quality - not tested
B
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

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