Execution Evidence Lab vs Vexor

In-depth architectural comparison of the Execution Evidence Lab and Vexor MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

E

Choose Execution Evidence Lab when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).
• Primary tools included: leave_feedback, request_evidence, find_verification_work.

Explore Execution Evidence Lab Details

Choose Vexor when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
• You have access to required keys: VEXOR_API_KEY, VEXOR_CONFIG_JSON.
• Primary tools included: Configurable embedding providers (OpenAI, Gemini, Voyage, local models), AST-aware code chunking for improved indexing, Optional reranking of search results.

Feature & Specification Comparison

Specification	E Execution Evidence Lab Developer Tools	Vexor scarletkc Developer Tools
Summary	Free execution evidence for Python dependency and configuration failures. Agents can search exact errors, compare measured environments, retrieve reproducible tests with hashes, and optionally return outcomes. Tested examples cover NumPy/pandas ABI, SQLite thread access, Starlette/HTTPX TestClient, settings aliases and SQLAlchemy async IO. Client reports stay separate from lab evidence. Remote Streamable HTTP MCP, REST and WebMCP; no service API key or payment.	A semantic search engine for files and code — find files by describing what they do, not their names. Local reusable indexes, configurable embedding providers (OpenAI, Gemini, Voyage, any OpenAI-compatible API, or fully offline local models), AST-aware code chunking, optional reranking. uvx vexor mcp or pip install vexor.

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "execution-evidence-lab": {
      "url": "https://execution-evidence-lab.tuned-drake-1114.chatgpt.site/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "scarletkc-vexor": {
      "command": "uvx",
      "args": [
        "vexor"
      ],
      "env": {
        "VEXOR_API_KEY": "YOUR_VEXOR_API_KEY_HERE",
        "VEXOR_CONFIG_JSON": "YOUR_VEXOR_CONFIG_JSON_HERE"
      }
    }
  }
}

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