feat: Multi-account support — query multiple Clarity projects by domain name

[zenmediasocial]

Summary

Adds multi-account support so a single MCP server instance can query multiple Clarity projects, identified by domain name.

The Problem

The current server supports one API token at a time. Anyone managing multiple sites with Clarity (agencies, consultants, multi-property teams) has to either:

• Run separate server instances per project
• Swap tokens manually between queries

The Solution

A ~/.clarity-mcp/accounts.json config file that maps domain names to API tokens:

{
  "default": "mysite.com",
  "accounts": {
    "mysite.com": { "token": "token-1" },
    "clientsite.com": { "token": "token-2" },
    "blog.example.org": { "token": "token-3" }
  }
}

Domain names are natural identifiers — easy to remember, no ambiguity. Users just say "show me sessions for clientsite.com" and it works.

Changes

• New src/accounts.ts — config loading, token resolution, account listing
• New list-clarity-accounts tool — lets the LLM discover available projects
• account parameter added to query-analytics-dashboard and list-session-recordings tools
• Response tagging — each response includes which account was queried (_account field)
• Updated instructions — reflects multi-account usage patterns
• Removed CLARITY_API_TOKEN from utils.ts — token resolution moved to accounts module

Backward Compatible

• Single --clarity_api_token CLI arg or CLARITY_API_TOKEN env var still works (becomes a "default" account)
• If only one account is configured, it auto-selects without requiring the account parameter
• Documentation tool works without account specification (uses any available token)

Config File Locations (checked in order)

1. --accounts-file=/custom/path.json
2. ~/.clarity-mcp/accounts.json
3. ~/.config/clarity-mcp/accounts.json

Context

I've been using Clarity since before public release and install it on every client site by default. Managing 15+ properties with per-project tokens was the friction that prompted this. The domain-keyed approach means zero mental overhead — you already know your sites by their domains.

Happy to iterate on the implementation if the team has preferences on config format or API conventions.

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