add mcp-metal-price mcp github link

[isdaniel]

Description

An MCP server that provides current and historical gold/precious metal prices via the GoldAPI.io service, The code repo is

https://github.com/isdaniel/mcp-metal-price

Motivation and Context

How Has This Been Tested?

Yes, we already tested each tool of it from several MCP client includes Claude desktop, cursor, Cline

Breaking Changes

None

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

This project enables easy access and exploration of metal price data through natural language interfaces and large language models (LLMs).

[olaservo]

Thanks for contributing this PR. This server has been moved to the archived repository at https://github.com/modelcontextprotocol/servers-archived to reduce maintenance overhead, so we can focus our efforts on a smaller set of core servers.
Since we're no longer accepting contributions to this server, we won't be able to merge this PR. If you're interested in contributing similar functionality, we recommend checking out the alternatives listed in the Readme.