What is the key difference between MCP Polygon) and Codex MCP?

MCP Polygon) belongs to the Finance & Fintech category with local stdio execution, while Codex MCP belongs to the Finance & Fintech category with local stdio execution.

How do I install MCP Polygon) or Codex MCP 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 MCP Polygon) and Codex MCP free or paid?

MCP Polygon) operates under a BYOK (Pay Provider Direct) model (API Key required). Codex MCP operates under a BYOK (Pay Provider Direct) model (API Key required).

Which MCP server has more tools and community activity?

MCP Polygon) lists 3 tools with 3 views and 389 GitHub stars. Codex MCP lists 6 tools with 3 views and 25 GitHub stars.

Can I use both MCP Polygon) and Codex MCP 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

MCP Polygon) vs Codex MCP

In-depth architectural comparison of the MCP Polygon) and Codex MCP 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

MCP Polygon)

Finance & Fintech · Local stdio

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

Codex MCP

Finance & Fintech · Local stdio

Quality: 41/100 (Fair) | Auth: API Key required

Verdict Summary: Choose MCP Polygon) if you need specialized Finance & Fintech tools running via a local process. Choose Codex MCP if your workspace requires Finance & Fintech integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose MCP Polygon) when:

You need dedicated capabilities in the Finance & Fintech 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: MASSIVE_API_KEY.
Primary tools included: search_endpoints, call_api, query_data.

Explore MCP Polygon) Details

Choose Codex MCP when:

You need dedicated capabilities in the Finance & Fintech 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: CODEX_API_KEY.
Primary tools included: Enriched blockchain data from Codex, Market data across 60+ networks, stdio execution for local MCP clients.

Feature & Specification Comparison

Specification	MCP Polygon) polygon-io Finance & Fintech	Codex MCP codex-data Finance & Fintech
Summary	) 🐍 ☁️ - An MCP server that provides access to Polygon.io financial market data APIs for stocks, indices, forex, options, and more.	Codex API integration for real-time enriched blockchain and market data on 60+ networks
Category & Scope	Finance & Fintech

Tools & Capabilities Breakdown

MCP Polygon) Tools (3)

search_endpoints

Search for API endpoints and built-in functions by natural language query. Returns titles, path patterns, and descriptions. Set `detail` to `"more"` for query parameter docs, or `"verbose"` for full documentation. Use `max_results` to limit results.

call_api

Call any Massive.com REST API endpoint. Supports storing results as an in-memory database table (`store_as`) and applying post-processing functions (`apply`). Paginated responses include a next-page hint.

query_data

Run SQL against stored SQLite DB. Supports `SHOW TABLES`, `DESCRIBE <table>`, `DROP TABLE <table>`, CTEs, window functions, and more. Results can also be post-processed with `apply`.

Codex MCP Tools (6)

Enriched blockchain data from Codex

Market data across 60+ networks

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).

MCP Polygon) Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "polygon-io-mcp-polygon-": {
      "command": "npx",
      "args": [
        "-y",
        "polygon-io-mcp-polygon-"
      ],
      "env": {
        "MASSIVE_API_KEY": "YOUR_MASSIVE_API_KEY_HERE"
      }
    }
  }
}

Codex MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "codex-data-codex-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@codex-data/codex-mcp"
      ],
      "env": {
        "CODEX_API_KEY": "YOUR_CODEX_API_KEY_HERE"
      }
    }
  }
}

Frequently Asked Questions

MCP Polygon) is categorized under Finance & Fintech and uses a local stdio subprocess. In contrast, Codex MCP belongs to Finance & Fintech using local stdio subprocess. Select MCP Polygon) when you need capabilities focused on finance & fintech and Codex MCP when you require tools for finance & fintech.

More alternatives to MCP Polygon)More alternatives to Codex MCP Finance & Fintech category hub Canonical compare URL