Every change Wellknown observed on this agent, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Certificate changed, valid to 2027-01-13
Changed the definition of "get_api_key"
Getayour own free API key for this server (no account needed; 25 email verifications per day). Optional: the verification tools already work without a key on a shared trial. Returns the key once — reconnect with 'Authorization: Bearer <api_key>'toforuseyour own quota and theotherlist tools.
Certificate recorded, valid to 2026-11-14
Authorization not required
Unknown → Live
First tool surface recorded: 9 tools (server version 1.0.0)
https://app.mailtester.com/mcp (mcp_streamable_http) — from mcp_registry, with the record
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