Langfuse Mcp — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited Langfuse Mcp (Agent Skill) and scored it 100/100 (green). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 0 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 0 flagged
Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
MCP server for Langfuse — lets Claude Code create projects, manage API keys, and query traces without touching the web UI.
Designed to work with [langfuse-kickstart](https://github.com/dominic-righthere/langfuse-kickstart), a self-hosted Langfuse v3 stack running locally via Docker Compose.
| Tool | Description |
|---|---|
list_projects | List all projects accessible with the current API key |
list_organizations | List all organizations |
create_project | Create a new project inside an organization |
create_api_key | Create a new pk/sk pair for a project |
list_api_keys | List API keys for a project |
delete_api_key | Delete an API key by ID |
list_traces | List traces with optional filters |
get_trace | Get full trace details including observations |
list_sessions | List sessions |
list_scores | List scores with optional filters |
create_score | Create a score on a trace or observation |
list_observations | List spans, generations, and events |
list_datasets | List datasets |
get_dataset | Get a dataset and its items |
list_prompts | List prompts in the prompt library |
get_prompt | Get a prompt by name, version, or label |
git clone https://github.com/dominic-righthere/langfuse-mcp
cd langfuse-mcp
cp .env.example .envEdit .env:
LANGFUSE_HOST=http://langfuse.localhost
LANGFUSE_PUBLIC_KEY=pk-lf-kickstart
LANGFUSE_SECRET_KEY=sk-lf-kickstart
LANGFUSE_DATABASE_URL=postgresql://langfuse:YOUR_POSTGRES_PASSWORD@localhost:5432/langfuseLANGFUSE_DATABASE_URL is needed for admin tools (create_project, create_api_key, etc.) that write directly to Postgres. With langfuse-kickstart, Postgres is exposed on 127.0.0.1:5432 — use the POSTGRES_PASSWORD from your kickstart .env.
Add to your .mcp.json (project-level) or claude_desktop_config.json:
{
"mcpServers": {
"langfuse": {
"command": "uv",
"args": ["run", "--project", "/path/to/langfuse-mcp", "langfuse-mcp"],
"env": {
"LANGFUSE_HOST": "http://langfuse.localhost",
"LANGFUSE_PUBLIC_KEY": "pk-lf-kickstart",
"LANGFUSE_SECRET_KEY": "sk-lf-kickstart",
"LANGFUSE_DATABASE_URL": "postgresql://langfuse:YOUR_POSTGRES_PASSWORD@localhost:5432/langfuse"
}
}
}
}Replace /path/to/langfuse-mcp with the actual path to the cloned repo.
Alternatively, if you use a .env file in the repo root, you can omit the env block and let the server load it automatically.
create_api_key returns the secret key only at creation time — store it immediately.create_project, create_api_key, delete_api_key, list_organizations) connect directly to Postgres. If Langfuse changes its schema in a major version these tools may need updating.list_traces, get_trace, etc.) use the public Langfuse API and are schema-stable.MIT
~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.