[codex] fix README MCP Python entrypoint example

[codexbountylab]

Fix: README quick-start import path for Python MCP usage

Closes #250.

Bug

The README currently documents this Python entrypoint:

from rustchain_mcp import RustChainMCPServer

server = RustChainMCPServer(api_key="your-api-key")
server.run()

That symbol is not exported by the package, so following the quick-start example fails at import time.

Fix

• Replace the broken example with the real package entrypoint: from rustchain_mcp.server import mcp
• Show the environment variables the server expects before calling mcp.run()

Scope

Docs-only change in README.md.

Validation

• Verified rustchain_mcp/__init__.py does not export RustChainMCPServer.
• Verified the MCP server entrypoint is defined in rustchain_mcp/server.py as mcp = FastMCP(...).

RTC payout wallet: RTCc78142b4cc31531e913c4082bc5d771eb0a91ac1

[jaxint]

PR Review

Reviewer: @jaxint
Wallet: AhqbFaPBPLMMiaLDzA9WhQcyvv4hMxiteLhPk3NhG1iG

Summary

This PR addresses: [codex] fix README MCP Python entrypoint example

Code Review

Changes Reviewed:

• Files: 1
• Lines: +11/-3

Assessment: ✅ Approved

The changes follow the project's coding standards and address the issue described in the PR title. The implementation is clean and minimal.

Testing

• Code changes are minimal and focused
• No additional test coverage required for this fix

Recommendation

APPROVE - Ready for merge.

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Review submitted via RustChain Bounty System
RTC bounty claim: 40 RTC per review (Bounty #73)

[Scottcjn]

Thanks for this. You correctly spotted that the README's documented import was pointing at a symbol that did not exist. I went with #253 because it fixes the root cause at the package level, re-exporting mcp from __init__ so the documented import works as written rather than only changing the docs. Closing this in favor of that one, but the diagnosis was right on the money. Grab another open bounty and keep them coming.