Koskamo

plzebo MCP

A cost-parity benchmarking tool for agent loops that measures cost per successful outcome and time across different model mixes or configurations. It runs locally, uses a metering gateway to record token usage, and provides verifiable JSON receipts with statistical analysis to determine if cost differences are significant.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

plzebo MCP logo, by wkoverfieldCommunity listingLocal stdioSource reviewed; not executedPublished by wkoverfield
Vendor documentation

What you can do with it

  • Benchmark cost and time for different agent model mixes
  • Verify statistical significance of cost differences between agent configurations
  • Generate verifiable JSON receipts for agent loop experiments

Source and maintenance

Community listingRegistry 0.2.0
mcp-registry: io.github.wkoverfield/plzebo@0.2.0Source repository
Maintenance checked

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

plzebo 0.2.0

npmnpx
plzebo package definition
{
  "version": "0.2.0",
  "transport": "stdio",
  "identifier": "plzebo",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "ANTHROPIC_API_KEY",
      "description": "Real Anthropic key for placebo-mode arms; arms only ever see placebo keys. Optional when every arm uses passthrough auth."
    },
    {
      "name": "OPENAI_API_KEY",
      "description": "Real OpenAI-compatible key for placebo-mode arms. Optional when every arm uses passthrough auth."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

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Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.
Cursor configuration
{
  "mcpServers": {
    "plzebo-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "plzebo@0.2.0"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "<YOUR_ANTHROPIC_API_KEY>",
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.
Cline configuration
{
  "mcpServers": {
    "plzebo-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "plzebo@0.2.0"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "<YOUR_ANTHROPIC_API_KEY>",
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.
VS Code configuration
{
  "servers": {
    "plzebo-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "plzebo@0.2.0"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "<YOUR_ANTHROPIC_API_KEY>",
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.
Claude Desktop configuration
{
  "mcpServers": {
    "plzebo-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "plzebo@0.2.0"
      ],
      "env": {
        "ANTHROPIC_API_KEY": "<YOUR_ANTHROPIC_API_KEY>",
        "OPENAI_API_KEY": "<YOUR_OPENAI_API_KEY>"
      }
    }
  }
}

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