README: add Axiom's official MCP server

[tsenart]

Description

Adding a new MCP server for Axiom that enables MCP clients to directly query and analyze event data like logs and traces using natural language.

Server Details

• Server: New server - Official Axiom MCP
• Implements tools for: querying data (queryApl) and listing datasets (listDatasets)

Motivation and Context

This server allows MCP clients to directly analyze event data stored in Axiom through natural language interactions. Instead of users having to write complex APL queries, the LLMs can handle that translation, making data analysis more accessible and conversational.

How Has This Been Tested?

• Tested with the Claude desktop app.
• Test scenarios included:
  • Basic dataset exploration and schema discovery
  • Error analysis and troubleshooting
  • Performance metrics analysis
  • Time-series data visualization
  • Complex multi-step analytical workflows

Breaking Changes

N/A - This is a new server implementation

Types of changes

• New feature (non-breaking change which adds functionality)

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

• The server includes rate limiting configuration for both query and dataset listing operations
• Detailed query examples and best practices are provided in the tool description
• Error handling includes validation for empty queries and proper API error propagation
• Configuration supports multiple methods: config file, CLI flags, and environment variables

[jspahrsummers]

Awesome, thank you!