Add Trade Agent MCP Server to README.md

[DeanMauro]

Adds Trade Agent's MCP server to the list.

Description

Adds Trade Agent's MCP Server with SSE Transport to the list.

Server Details

• Server: https://github.com/Trade-Agent/trade-agent-mcp

Motivation and Context

Trade Agent currently offers the only MCP server that executes stock trades on common brokerages (Robinhood, E*Trade, Coinbase, and Kraken).

How Has This Been Tested?

Tested with

• Cloudflare's AI Playground
• Cursor
• Claude Desktop

Scenarios:
✅ Authenticate
✅ Create Pending Trade Order
✅ Execute Trade Order

Breaking Changes

N/A

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

[olaservo]

Thanks for your contribution to the servers list. This has been merged in this combined PR: #2075

This is a new process we're trying out, so if you see any issues feel free to re-open the PR and tag me.