What is the key difference between Prolog Reasoner and SandboxAPI?

Prolog Reasoner belongs to the Code Execution category with local stdio execution, while SandboxAPI belongs to the Code Execution category with cloud HTTP/SSE execution.

How do I install Prolog Reasoner or SandboxAPI in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Prolog Reasoner and SandboxAPI free or paid?

Prolog Reasoner operates under a Free / Open Source model (No auth required). SandboxAPI operates under a BYOK (Pay Provider Direct) model (API Key required).

Which MCP server has more tools and community activity?

Prolog Reasoner lists 5 tools with 3 views and 11 GitHub stars. SandboxAPI lists 3 tools with 3 views and 2 GitHub stars.

Can I use both Prolog Reasoner and SandboxAPI together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Prolog Reasoner vs SandboxAPI

In-depth architectural comparison of the Prolog Reasoner and SandboxAPI 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.

At a Glance & Executive Verdict

Prolog Reasoner

Code Execution · Local stdio

Quality: 57/100 (Good) | Auth: No auth required

SandboxAPI

Code Execution · Remote HTTP/SSE

Quality: 51/100 (Good) | Auth: API Key required

Verdict Summary: Choose Prolog Reasoner if you need specialized Code Execution tools running via a local process. Choose SandboxAPI if your workspace requires Code Execution integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Prolog Reasoner when:

You need dedicated capabilities in the Code Execution domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
Primary tools included: execute_prolog, list_rule_bases, get_rule_base.

Explore Prolog Reasoner Details

Choose SandboxAPI when:

You need dedicated capabilities in the Code Execution domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: API Key required (BYOK (Pay Provider Direct)).
You have access to required keys: SANDBOXAPI_API_KEY, MCP_API_KEY, MCP_PORT, SANDBOXAPI_URL.
Primary tools included: execute_code, execute_batch, list_languages.

Explore SandboxAPI Details

Feature & Specification Comparison

Specification	Prolog Reasoner rikarazome Code Execution	SandboxAPI Code Execution
Summary	SWI-Prolog execution for LLMs with CLP(FD), negation-as-failure, and recursion. Benchmarked 90% vs 73% LLM-only accuracy on 30 logic problems.	Execute code in 8 languages (Python, JS, TS, Go, Java, C++, C, Bash) in gVisor sandboxes.
Category & Scope	Code Execution

Tools & Capabilities Breakdown

Prolog Reasoner Tools (5)

execute_prolog

Execute Prolog code and return reasoning results. Write Prolog facts and rules, then run a query against them. Supports CLP(FD) constraints, negation-as-failure, and all standard SWI-Prolog features.

list_rule_bases

List all saved rule bases with description and tags. Returns ``{"rule_bases": [{"name": str, "description": str, "tags": list[str]}, ...]}`` sorted by name. Metadata is extracted from the leading ``% description:`` / ``% tags:`` comments of each rule base file (see §4.10).

get_rule_base

Retrieve the Prolog source of a saved rule base.

save_rule_base

Save a named rule base containing Prolog rules that can be reused across ``execute_prolog`` calls. Use this for stable, reusable knowledge (e.g. ``piece_moves`` for chess piece movement rules). For one-time facts, include them directly in ``prolog_code`` instead.

delete_rule_base

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).

Prolog Reasoner Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "rikarazome-prolog-reasoner": {
      "command": "uvx",
      "args": [
        "prolog-reasoner"
      ]
    }
  }
}

SandboxAPI Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "sandboxapi": {
      "url": "https://mcp.sandboxapi.dev/mcp"
    }
  }
}

Frequently Asked Questions

Prolog Reasoner is categorized under Code Execution and uses a local stdio subprocess. In contrast, SandboxAPI belongs to Code Execution using remote streaming HTTP/SSE transport. Select Prolog Reasoner when you need capabilities focused on code execution and SandboxAPI when you require tools for code execution.

More alternatives to Prolog Reasoner More alternatives to SandboxAPI Code Execution category hub