Logfire CLI

The Rust command-line interface for Pydantic Logfire. Sign in, query your traces and logs, manage projects and tokens, and connect your coding agent to Logfire from the terminal.

This package installs the native CLI, not the Python instrumentation SDK. Install an application SDK separately to send telemetry; see the Logfire documentation.

Install

Try it with uv:

uvx logfire-cli --help

Install it as an isolated command-line tool:

uv tool install logfire-cli
logfire --help

Or use pipx install logfire-cli. In an activated virtual environment, you can also run python -m pip install logfire-cli.

The package provides both logfire and logfire-cli. If another package already provides a logfire command, use logfire-cli or uvx logfire-cli to select this CLI explicitly.

Python 3.9 or newer is required for the launcher. Wheels include the matching prebuilt binary for macOS (ARM64 and x86-64), Windows (ARM64, x86, and x86-64), GNU/Linux (ARM64, ARMv7, x86, x86-64, PowerPC 64 LE, RISC-V 64, and IBM Z), and musl Linux (ARM64, ARMv6, ARMv7, x86, and x86-64). You do not need Rust installed. GNU/Linux requires glibc 2.17 or newer, except RISC-V 64, which requires glibc 2.31. The musl wheels support compatible Alpine Linux versions.

New to Logfire

From your application's directory, create an account, organization, and first project in one guided flow:

logfire --region us signup --org acme --project my-app
logfire --org acme project current

Replace acme and my-app with the real names you want. Use --region eu for the EU region. Browser OAuth credentials go to the operating system credential store; the project SDK credential stays under .logfire/ in your application.

Then add instrumentation with an installed coding agent:

logfire --org acme setup

Use an existing account

Use your real organization name in place of acme, and eu instead of us if your data is in the EU region:

logfire --region us --org acme auth
logfire --org acme mcp projects

Complete sign-in and approve access in your browser. OAuth credentials are stored in the OS credential store, scoped to the Logfire origin and organization.

Choose a project from the list, then query its data through the hosted Model Context Protocol (MCP) server:

logfire --org acme mcp query run 'SELECT message FROM records LIMIT 20' --project my-app

For scripts, make the target explicit and request non-interactive JSON output:

logfire --org acme --no-input --output json mcp projects

Connect a local project

From your application's directory, create or choose a project interactively:

logfire --org acme init

To connect an exact existing project without a picker:

logfire --org acme init use --name my-app --permission send
logfire project current

OAuth remains in the OS credential store; the SDK token stays with the local project. Keep credential files out of version control.

To create additional read or write tokens for that project:

logfire --org acme token read
logfire --org acme token write

Each command creates a new token and prints the secret once to standard output. Store it securely; do not paste it into logs, issues, or chat. These commands do not replace the project's saved SDK write token.

Run Python with automatic instrumentation

The CLI selects the active project interpreter and delegates instrumentation to the Logfire Python SDK installed in that environment:

logfire run app.py
logfire run -m uvicorn main:app
logfire run pytest tests/

Use --python .venv/bin/python when interpreter discovery is ambiguous. Run logfire help run for selection rules and passthrough behavior.

Set up instrumentation with a coding agent

With a supported coding agent installed, run this from your application's directory:

logfire --region us --org acme setup

The CLI detects installed agents and hands off the Logfire setup instructions bundled with this release. The agent can change your project to add instrumentation, using its normal permission and approval controls. It receives the selected target and project identity, but it does not inherit the CLI's LOGFIRE_API_KEY, LOGFIRE_TOKEN, or LOGFIRE_MCP_TOKEN.

If you already know the exact project and setup task, pass them explicitly:

logfire --region us --org acme setup --project api --task instrumentation

Use bare setup when you want the CLI and agent to discover the task from the current directory.

To inspect the instructions without launching an agent:

logfire --region us --org acme wizard --print-prompt

Help and updates

logfire help
logfire help mcp
logfire help wizard
uv tool upgrade logfire-cli

Use the upgrade command for a uv tool install installation; otherwise upgrade with the package manager you used to install it.

See the Logfire documentation for application instrumentation and platform guides. Logfire CLI is licensed under the MIT license.