# Allegrow
ID: 09-allegrow
Page: https://gtmmcps.com/tools/09-allegrow
JSON: https://gtmmcps.com/data/tools/09-allegrow.json
Documentation references: https://gtmmcps.com/docs/09-allegrow/
Category: Email Deliverability
MCP support: official
Testing: RESEARCHED
API access: paid
Last checked: 2026-09-07
Endpoint check: docs-only; date: 2026-09-04

B2B email verification and deliverability platform - resolves catch-all/secure-email-gateway addresses that legacy verifiers mark "unknown," sends warm-up email to real B2B accounts, and runs hourly SPF/DKIM/DMARC checks with a "Safety Net" that auto-pauses sends to addresses likely to mark mail as spam.

## MCP links
- https://mcp.allegrow.co/mcp
- https://www.allegrow.co/knowledge-base/claude-email-mcp

## Sources
- https://www.allegrow.co/knowledge-base/claude-email-mcp
- https://www.allegrow.co/knowledge-base/complete-guide-to-email-warm-up-tools-which-increase-sender-reputation
- https://emailwarmup.com/blog/email-deliverability-tools/allegrow-review/
- https://mcp.allegrow.co/mcp

## Research notes
Vendor-published on Allegrow's own domain and listed in Claude's connector directory (claude.ai/directory/allegrow) - clears this schema's bar for "official" since Allegrow built and documents it themselves. Worth noting Claude's own directory UI labels it a "community connector" (meaning it passed Anthropic's automated review but isn't Anthropic-verified) - a different axis than this schema's official/community distinction, which tracks who built the server, not who verified it. 2026-09-07: https://mcp.allegrow.co/mcp returned 401 {"error":"unauthorized"} to an MCP initialize POST, on a vendor-owned mcp. subdomain (https://mcp.allegrow.co/mcp).

## Named capabilities
Tool names below are reported by sources. Their presence is not a successful call.

## CLI evidence
Status: none-found

Read current vendor documentation before configuring or running commands.