Touchstone MCP
==============

Model Context Protocol access to the Touchstone card-grading standard: the
rubric as data, plus scoring tools.

The Touchstone MCP server is provided by Grailology, which uses Touchstone as
its grading standard. It is not operated by the Touchstone project.

Endpoint: POST https://mcp.grailology.com/mcp (MCP streamable HTTP transport)

Access requires a Grailology account API key (free):
  Authorization: Bearer gk_...   — create one at https://grailology.com/account
  (the account page's key dialog hands you ready-made client configs)

Disclosure: authenticated requests are logged with your account's key id
for usage tracking and rate limits (no IP addresses are retained).