Koskamo

Clearbar MCP

An MCP server that provides access to Clearbar's model verdicts, allowing agents to query which LLM is the cheapest to pass specific tasks based on public datasets. It exposes tools to list available verdicts and retrieve detailed cost, pass rate, and failure analysis for tasks like sentiment analysis, tool calling, and intent classification.

Visit Clearbar

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Clearbar MCP logo, by ClearbarVendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-07Operated by Clearbar
MCP endpoint (Streamable HTTP)
https://clearbar.grain64.com/mcp
Vendor documentation

What its tools do

2 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (2)

2 of 2 have a description · 2 of 2 declare behavior hints · 2 of 2 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Passed Official MCP Registry namespace is tied to clearbar.grain64.com ·
  • Passed Endpoint is on the registry namespace domain ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • List all available model verdicts with optional task filtering
  • Retrieve detailed cost and pass rate for a specific task verdict
  • Identify the cheapest LLM that meets quality thresholds for a task

Source and maintenance

Vendor evidenceRegistry 1.0.0
mcp-registry: com.grain64.clearbar/verdicts@1.0.0Project website

Protocol and capabilities

Server
clearbar-verdicts 1.0.0
MCP protocol negotiated in check
2025-06-18
Tools
2 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {
    "listChanged": false
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Ask which LLM is the cheapest one that still clears a quality bar for a task. list_verdicts shows every published verdict (task, cheapest passing model, cost per successful task); get_verdict(slug) gives the full table, the run file and the script to re-run it. Figures are measured on public datasets with retries and failures counted; the dated price snapshot is in every answer. To get the same verdict on your own examples, open the app_url in the answer.

Tools

2 advertised

list_verdicts — List verdicts: which model is cheapest for each task
Advertised by the server during the last successful anonymous check.
Advertised read-only

Which LLM is the cheapest that still passes? Lists every published Clearbar verdict: the task, the pass bar, the cheapest passing model, its cost per successful task (retries and failures counted) and the page to check it. Optional filter by task type.

list_verdicts input schema
{
  "type": "object",
  "properties": {
    "task": {
      "type": "string",
      "description": "Only verdicts of this task type, for example classification, extraction or tool-call."
    }
  },
  "additionalProperties": false
}
list_verdicts annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}
get_verdict — Get one verdict: cheapest passing model, cost, failures
Advertised by the server during the last successful anonymous check.
Advertised read-only

The full verdict for one task: the cheapest model that clears the bar, its pass rate and cost per successful task in US dollars, the baseline model it is compared with, every candidate's status, plus links to the verdict page, the run file (JSON) and the script that re-runs it. Get the slug from list_verdicts.

get_verdict input schema
{
  "type": "object",
  "required": [
    "slug"
  ],
  "properties": {
    "slug": {
      "type": "string",
      "description": "Verdict slug from list_verdicts, for example sms-spam."
    }
  },
  "additionalProperties": false
}
get_verdict annotations
{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (2 of 2 answered).

  1. 2026-11-07: 1 of 1 checks answered
  2. 2026-11-09: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
2235 ms
95th percentile latency
2235 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 2235 ms · metadata changed · 2 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http clearbar-mcp https://clearbar.grain64.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add clearbar-mcp --url https://clearbar.grain64.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable clearbar-mcp in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "clearbar-mcp": {
      "url": "https://clearbar.grain64.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "clearbar-mcp": {
      "type": "streamableHttp",
      "url": "https://clearbar.grain64.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start clearbar-mcp and inspect its tools.
VS Code configuration
{
  "servers": {
    "clearbar-mcp": {
      "type": "http",
      "url": "https://clearbar.grain64.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http clearbar-mcp https://clearbar.grain64.com/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://clearbar.grain64.com/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "clearbar-mcp": {
      "serverUrl": "https://clearbar.grain64.com/mcp"
    }
  }
}

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Do you run Clearbar MCP?

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