Install for Hermes

hermes mcp add persql --url https://mcp.persql.com/mcp --auth oauth

Or add the block to config.yaml under mcp_servers:

mcp_servers:
  persql:
    url: "https://mcp.persql.com/mcp"
    auth: oauth

Hermes drives the MCP OAuth 2.1 PKCE flow, so the first tool call opens a browser — sign in, pick a workspace, and the token is stored under ~/.hermes/mcp-tokens/ and refreshed automatically. No header to paste.

Bearer fallback

For a static token instead of OAuth, create a psql_live_… token under console.persql.com → API tokens and pass it as a header:

mcp_servers:
  persql:
    url: "https://mcp.persql.com/mcp"
    headers:
      Authorization: "Bearer psql_live_…"

What you get

About sixty SQL-shaped tools. The full list is in the MCP reference.