Langfuse MCP vs MCP Victoriametrics
A side-by-side look at the Langfuse MCP and MCP Victoriametrics MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Langfuse MCP for monitoring work as a local process; choose MCP Victoriametrics for monitoring over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Langfuse MCP when
- You need dedicated capabilities in the Monitoring domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
LANGFUSE_PUBLIC_KEY, LANGFUSE_SECRET_KEY, LANGFUSE_HOST, LANGFUSE_MCP_READ_ONLY. - You want tools like
list_annotation_queues, create_annotation_queue, get_annotation_queue.
Choose MCP Victoriametrics when
- You need dedicated capabilities in the Monitoring domain.
- You prefer a remote HTTP/SSE transport.
- You have the keys it needs:
VM_INSTANCE_ENTRYPOINT, VMC_API_KEY, VM_INSTANCE_TYPE, MCP_SERVER_MODE, MCP_LISTEN_ADDR. - You want tools like
active_queries, alerts, documentation.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Monitoring | Monitoring |
| Quality signal | 65/100 · Great | 64/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | API key required | Not declared |
| Pricing | Free | Free |
| Required env vars | LANGFUSE_PUBLIC_KEYLANGFUSE_SECRET_KEYLANGFUSE_HOSTLANGFUSE_MCP_READ_ONLY | VM_INSTANCE_ENTRYPOINTVMC_API_KEYVM_INSTANCE_TYPEMCP_SERVER_MODEMCP_LISTEN_ADDR |
| Verified owner | Community listing | Community listing |
| GitHub stars | 113 | 239 |
| Directory activity | 6 views 0 installs 0 upvotes | 3 views 0 installs 0 upvotes |
| Tools | 48 | 17 |
| Full listing | View Langfuse MCP | View MCP Victoriametrics |
Tools & capabilities
Langfuse MCP tools 48
list_annotation_queuesList annotation queues with pagination.create_annotation_queueCreate an annotation queue.get_annotation_queueGet a single annotation queue by ID.list_annotation_queue_itemsList items in an annotation queue.get_annotation_queue_itemGet a specific annotation queue item by queue and item ID.create_annotation_queue_itemCreate an annotation queue item.update_annotation_queue_itemUpdate the status of an annotation queue item.delete_annotation_queue_itemDelete an annotation queue item.create_annotation_queue_assignmentAssign a user to an annotation queue.delete_annotation_queue_assignmentUnassign a user from an annotation queue.list_datasetsList all datasets in the project with pagination. Returns metadata about datasets including name, description, item count, and timestamps. Args: ctx: Context object containing lifespan context with Langfuse client page: Page number for pagination (starts at 1) limit: Maximum items per page (max 100) Returns: A dictionary containing: - data: List of dataset metadata objects - metadata: Pagination info (page, limit, total)get_datasetGet a specific dataset by name. Retrieves dataset details including metadata and item count. Args: ctx: Context object containing lifespan context with Langfuse client name: The name of the dataset to fetch Returns: A dictionary containing dataset details: - id: Unique dataset identifier - name: Dataset name - description: Dataset description - metadata: Custom metadata - items: List of dataset items (if included by the API) - runs: List of dataset runs (if included by the API)- +36 more on the listing page
MCP Victoriametrics tools 17
active_queriesActive queries. This tool can determine currently active queries in the VictoriaMetrics instance. This information is obtained from the "/api/v1/status/active_queries" HTTP endpoint of VictoriaMetrics API.alertsList of firing and pending alerts of the VictoriaMetrics instance. This tool uses `/api/v1/alerts` endpoint of vmalert API, proxied by VictoriaMetrics API.documentationSearch documentation resources for the given search query, returning the URIs of the resources that match the search criteria sorted by relevance. This tool can help to get context for any VictoriaMetrics related question.explain_queryExplain how MetricsQL query workslabel_valuesList of label values from VictoriaMetrics instance for a provided label name. This tool uses `/api/v1/label/{labelName}/values` endpoint of VictoriaMetrics API.labelsList of label names of the VictoriaMetrics instance. This tools uses `/api/v1/labels` endpoint of VictoriaMetrics API.metric_statisticsStatistics of metrics usage in queries of the VictoriaMetrics instance. This tool helps to identify unused (never queried) or rarely used metrics or conversely actively queried metrics. This tool uses `/api/v1/status/metric_names_stats` endpoint of VictoriaMetrics API.metricsList of available metrics of the VictoriaMetrics instance. This tool uses `/api/v1/label/__name__/values` endpoint of VictoriaMetrics API.metrics_metadataReturns stored metrics details (metadata) such as name, type, help (description), and unit, and can be used to generate natural language queries. This tool uses `/api/v1/metadata` endpoint of VictoriaMetrics API.prettify_queryPrettify (format) MetricsQL query. This tool uses `/prettify-query` endpoint of VictoriaMetrics API.queryInstant query executes PromQL or MetricsQL query expression at the given time. The result of Instant query is a list of time series matching the filter in query expression. Each returned series contains exactly one (timestamp, value) entry, where timestamp equals to the time query arg, while the value contains query result at the requested time. This tool uses `/api/v1/query` endpoint of VictoriaMetrics API.query_rangeRange query executes the query expression at the given [start…end] time range with the given step. The result of Range query is a list of time series matching the filter in query expression. Each returned series contains (timestamp, value) results for the query executed at start, start+step, start+2*step, …, start+N*step timestamps. In other words, Range query is an Instant query executed independently at start, start+step, …, start+N*step timestamps with the only difference that an instant query does not return ephemeral samples (see below). Instead, if the database does not contain any samples for the requested time and step, it simply returns an empty result. This tool uses `/api/v1/query_range` endpoint of VictoriaMetrics API.- +5 more on the listing page
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
Langfuse MCP
{
"mcpServers": {
"avivsinai-langfuse-mcp": {
"command": "uvx",
"args": [
"langfuse-mcp"
],
"env": {
"LANGFUSE_PUBLIC_KEY": "YOUR_LANGFUSE_PUBLIC_KEY_HERE",
"LANGFUSE_SECRET_KEY": "YOUR_LANGFUSE_SECRET_KEY_HERE",
"LANGFUSE_HOST": "YOUR_LANGFUSE_HOST_HERE",
"LANGFUSE_MCP_READ_ONLY": "YOUR_LANGFUSE_MCP_READ_ONLY_HERE"
}
}
}
}
MCP Victoriametrics
{
"mcpServers": {
"mcp-victoriametrics": {
"url": "https://play-mcp.victoriametrics.com/mcp"
}
}
}
Frequently asked questions
Langfuse MCP is categorized under Monitoring and uses a local stdio subprocess. MCP Victoriametrics belongs to Monitoring and uses a remote HTTP/SSE transport. Pick Langfuse MCP for monitoring work and MCP Victoriametrics for monitoring.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
Langfuse MCP is listed as free. Auth: api key required. MCP Victoriametrics is listed as free. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add avivsinai-langfuse-mcp and mcp-victoriametrics as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Langfuse MCP has a quality signal of 65/100 (Great) with 6 views, 0 installs and 113 GitHub stars. MCP Victoriametrics has 64/100 (Good) with 3 views, 0 installs and 239 GitHub stars.