Free MCP troubleshooting-preview tools; purchases stay human-directed.
Free
2 servers across payments & billing and research. The largest is HTTP 402 AI Tollbooth.
Payments & Billing · Research
Free MCP troubleshooting-preview tools; purchases stay human-directed.
Contractor dataset discovery, masked previews, pricing, and production API plans from $39/month.
The rest either hold an API key issued by the publisher or ask for nothing.
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