keys
A key is one header. Nothing else changes.
Without a key the read tools answer 60 calls a day per address. A free key raises that to 2,000 a month for your whole organization and opens submit_trap.
Add the server first if you have not. The key goes in later as a header, and the caps are per organization, so extra keys never multiply the allowance.
claude mcp add --transport http wellworn https://mcp.wellworn.dev/mcp