How to connect Langfuse to OpenClaw
Connect Langfuse to OpenClaw with ClawLink: paste your Langfuse key once and 10 tools work from chat. No MCP server to run, nothing stored on your machine.
LangfuseAPI KEYMCPOpen source LLM engineering platform.. Once connected, OpenClaw can read and act on Langfuse from chat — pairing, token refresh, and tool wiring handled for you.
The usual route to Langfuse access for OpenClaw is an MCP server you configure and keep running, plus your own OAuth app or API keys. ClawLink gives OpenClaw a more practical Langfuse setup: install one ClawHub skill, connect Langfuse in the browser, and OpenClaw can call real Langfuse actions from any chat surface with no auth, token refresh, or tool wiring to build yourself.
Setup
It takes three steps to connect OpenClaw to Langfuse.
1Install the plugin
Paste the setup prompt into OpenClaw, or install from the terminal and ask OpenClaw to pair:
openclaw plugins install clawhub:clawlink-plugin- 2
Connect Langfuse
Paste your API key in the dashboard.
- 3
Use it from chat
Ask OpenClaw: "What can you do with Langfuse?"
Install by command
The setup prompt above does all of this in one paste. By hand, it is one install command plus a browser approval:
openclaw plugins install clawhub:clawlink-pluginThen ask OpenClaw to set up ClawLink. It starts browser pairing and prints an approval link — open it, approve the device, return to the chat, and say done. Finally, connect Langfuse in the ClawLink dashboard — paste your Langfuse API key once.
Verify the connection by asking OpenClaw:
Pull the relevant data from Langfuse, summarize it in plain English, and point out anything that needs attention.
Using a different agent?
The OpenClaw plugin is one client of ClawLink's MCP server. Claude Code, Cursor, Codex, or any agent that can run a shell command pairs with the same ClawLink account through the CLI:
npx -y @useclawlink/cli loginlogin opens the same browser approval and stores a credential locally. Once Langfuse is connected in the dashboard, that agent calls the same 10 Langfuse tools over MCP. Full setup for MCP clients and shell agents: connect apps to any AI agent.
Langfuse MCP for OpenClaw
Looking for a Langfuse MCP server for OpenClaw? ClawLink connects Langfuse to OpenClaw and exposes 10 Langfuse tools your agent can call over MCP, with hosted auth and nothing to run or maintain yourself. Using Hermes instead? The Hermes Langfuse integration works the same way.
What the OpenClaw Langfuse integration can do
10 Langfuse tools are ready for OpenClaw once the account is connected.
All 10 Langfuse tools for OpenClaw
| Tool | What it does |
|---|---|
Get prompt langfuse_get_prompt | Retrieve a Langfuse text or chat prompt by name, deployment label, or exact version, with |
List annotation queues langfuse_list_annotation_queues | List annotation queues configured for human evaluation in the connected Langfuse project |
List dataset items langfuse_list_dataset_items | List dataset items, optionally scoped to a dataset, source trace or observation, or historical |
List datasets langfuse_list_datasets | List datasets available to the connected Langfuse project |
List experiments langfuse_list_experiments | List Langfuse experiments active in a required time range, optionally including metadata and |
List models langfuse_list_models | List Langfuse-managed and project-custom model pricing definitions used for usage and cost |
List observations langfuse_list_observations | Search Langfuse observations such as generations, spans, events, agents, and tool calls |
List scores langfuse_list_scores | Search numeric, boolean, categorical, text, and correction scores with subject and annotation |
Query metrics langfuse_query_metrics | Run an aggregate Langfuse metrics query over observations or numeric, boolean, or categorical |
Create score langfuse_create_score | Attach an evaluation score to exactly one Langfuse trace, session, or dataset run, optionally |
Try it: find the Langfuse tool you need
Browse the 10 Langfuse tools
Click any tool to see exactly what OpenClaw can do and copy a ready-to-use prompt.
Example prompts
Pull the relevant data from Langfuse, summarize it in plain English, and point out anything that needs attention.
List the relevant items in Langfuse, group them by priority, and recommend what OpenClaw should do next.
List the relevant items in Langfuse, group them by priority, and recommend what OpenClaw should do next.
List the relevant items in Langfuse, group them by priority, and recommend what OpenClaw should do next.
ClawLink vs. building it yourself
The alternative to ClawLink is usually manual API key setup plus your own token handling, permission troubleshooting, and tool plumbing for OpenClaw. That is fine if you want to build and maintain the integration yourself. Most teams just want Langfuse working from chat.
| Manual | ClawLink | |
|---|---|---|
| Credential handling | Collect, validate, store, and rotate the Langfuse API key yourself, then make sure every tool call uses the right account. | Users complete the hosted ClawLink setup once and the connected Langfuse account becomes available to the agent without you building credential management. |
| Ongoing maintenance | You own refresh logic, permission debugging, environment config, and every provider-specific edge case for Langfuse. | ClawLink handles the repetitive integration plumbing so your team can focus on the workflow instead of the infrastructure. |
| Agent usability | You still need to expose the right Langfuse actions to the runtime in a format your agent can reliably use. | 10 tools for Langfuse are already exposed through ClawLink, so the agent can read and act from chat immediately. |
ClawLink vs. Composio
Composio also exposes Langfuse to AI agents. It is developer infrastructure: Python and TypeScript SDKs, an MCP server, and a catalog past 1,000 apps, aimed at teams shipping agent products. ClawLink is built for OpenClaw users instead. You install the plugin once, connect Langfuse in the browser, and the 10 tools above work from chat. There is no SDK and no config file, and the Langfuse key you paste at setup is stored server-side rather than kept in your environment. Choosing between them? Read the full Composio alternatives comparison.
Troubleshooting
OpenClaw installed the Langfuse skill but can't call the tools
The ClawHub skill teaches OpenClaw about Langfuse, but the calls run through the ClawLink plugin and your connected account. Make sure Langfuse is connected in the dashboard, then start a fresh chat so OpenClaw reloads the tool catalog. If OpenClaw runs as a persistent gateway, restart it so the new tools register.
Connection succeeds but no tools appear
Reconnect Langfuse from the dashboard, then start a fresh chat if the runtime still has the old tool catalog loaded.
"Tool schema not loaded yet" error when calling Langfuse tools
Langfuse tool schemas load on demand the first time a tool runs and are cached after that, so this error usually clears on its own: wait a few seconds and retry the same request. If every Langfuse call keeps failing with it in a fresh chat, reconnect from the dashboard, and contact support if it still persists — that pattern points to a configuration problem on our side, not something you can fix by reconnecting again.
Langfuse returns 403 or "permission denied" on one action while others work
Two usual causes. The connected account may not have access to the specific workspace, inbox, store, or project in the request — check that first. If access looks right, the agent may have sent a placeholder value (like "YOUR_ID" or an example id from documentation) instead of a real one: ask it to run a list or search tool first, then retry the action with a real id from those results. Most failures at this stage are one of these two, not ClawLink bugs.
API key setup works but results look incomplete
Double-check that the API key for Langfuse has the right scopes or account access. A valid key can still be too limited for some reads or writes.
FAQ
Is there a OpenClaw Langfuse integration?
Yes. ClawLink is the fastest way to connect OpenClaw to Langfuse: link your Langfuse account once in the browser and OpenClaw can call the Langfuse API through 10 ready-made tools — no custom code or token handling.
How do I add Langfuse to OpenClaw with ClawLink?
Paste the setup prompt from this page into OpenClaw. It installs the ClawLink Langfuse skill from ClawHub, then you click Connect in the dashboard to authorize Langfuse. OpenClaw calls the tools from the next message — no config files, and the Langfuse key you paste is stored server-side instead of in your environment.
How long does it take to connect Langfuse to OpenClaw?
About two minutes. Sign in, click Connect next to Langfuse in the dashboard, authenticate, and OpenClaw can use it from the next chat message.
Why use ClawLink instead of wiring Langfuse up myself?
The alternative to ClawLink is usually manual API key setup plus your own token handling, permission troubleshooting, and tool plumbing for OpenClaw. That is fine if you want to build and maintain the integration yourself. Most teams just want Langfuse working from chat.
OpenClaw installed the Langfuse skill but can't call the tools
The ClawHub skill teaches OpenClaw about Langfuse, but the calls run through the ClawLink plugin and your connected account. Make sure Langfuse is connected in the dashboard, then start a fresh chat so OpenClaw reloads the tool catalog. If OpenClaw runs as a persistent gateway, restart it so the new tools register.
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