Truelist MCP - Email validation for AI agents — hosted MCP, no keys

Corey here, co-founder of Truelist. Agents are writing more and more outreach — but they've been flying blind on whether the addresses they're writing to actually exist. So we gave them the missing tool. The Truelist MCP server is hosted — nothing to install or run: claude mcp add --transport http truelist https://api.truelist.io/mcp First use opens a browser OAuth window. No API keys copied into config files, no tokens in dotfiles. Once connected, your agent can handle the whole hygiene loop conversationally: - "Is jane@example.com actually deliverable?" - "Validate these 30 addresses from my HubSpot export." - "Create a batch called Q3 cleanup with this list." - "Which of my recent batches has the most invalid emails?" Works in Claude Desktop, Claude Code, Cursor, and VS Code/Copilot — anything that speaks MCP over HTTP. Under the hood it's the same engine as our platform: real SMTP-level verification, catch-all resolution, disposable detection. 1B+ emails validated. If you're building agents that touch email in any way, I'd love to hear what tools you'd want next — the MCP surface is very extendable.