Your emails are landing in spam and you don't know why. Open rates collapsed. Cold outreach vanishes. The newsletter sits in Promotions ā or worse. Meanwhile Gmail and Yahoo now reject unauthenticated bulk mail outright, enforce a 0.3% spam-rate ceiling, and mandate one-click unsubscribe. Deliverability stopped being optional in 2024 ā InboxForge turns it into engineering.
InboxForge is a 5-tool MCP server that diagnoses why mail gets filtered, engineers the complete SPF/DKIM/DMARC stack with copy-paste records, designs organic inbox warmup protocols, eliminates spam triggers across all three trigger families, and architects compliant sending infrastructure that scales without torching your primary domain.
š Live endpoint: https://inboxforge-api.agentweb-hub.workers.dev/mcp
š Full 51-server catalog: MCP Hub
| Tool | What it does |
|---|---|
inbox.architect |
Master 1-shot engine ā full diagnosis across the 5 deliverability layers (auth ā reputation ā engagement ā content ā infrastructure), situation-specific triage, ordered fix sequence & the free monitoring stack |
inbox.dns_auth |
Complete SPF/DKIM/DMARC engineering: the 10-lookup limit, 2048-bit DKIM selector strategy, progressive DMARC rollout (none ā quarantine ā reject), BIMI/MTA-STS/TLS-RPT/PTR, with Google Workspace / Microsoft 365 / custom SMTP paths |
inbox.warmup |
Week-by-week warmup ramps for new domains, dormant revivals, ESP migrations & volume scale-ups ā with engagement engineering, volume math and failure-signal response ladders |
inbox.spam_triggers |
Kills content, technical and reputation triggers: link patterns, HTML soup, List-Unsubscribe compliance, spam traps, the 0.3% complaint wall ā with before/after rewrites and B2B gateway vs consumer Gmail calibration |
inbox.sending_infra |
Root-domain firewall, lookalike portfolios, mailbox fleet math, ESP selection matrix, CAN-SPAM/GDPR compliance layer & scaling playbooks from solo founder to high-volume ops |
Add to your MCP client (Cursor, Claude Code, Windsurf, or any MCP-compatible agent):
{
"mcpServers": {
"inboxforge": {
"url": "https://inboxforge-api.agentweb-hub.workers.dev/mcp"
}
}
}Then ask your agent things like:
- "My cold emails dropped from 60% to 12% opens ā diagnose it"
- "Generate the full SPF/DKIM/DMARC setup for my Google Workspace domain"
- "Design a warmup plan for a brand-new sending domain targeting 500/day"
- "Audit my email template for spam triggers before I send to 10k subscribers"
inbox.audit_domain_live queries real DNS records in real time (DNS-over-HTTPS): your actual SPF record and lookup-count risk, your DMARC policy level, MX records, and optional DKIM selector verification ā with a prioritized fix list computed from what is actually published right now. Try it: pass your own domain.
Start free ā 10 requests/day, no signup, no card.
| Tier | Price | What you get |
|---|---|---|
| Freemium | $0 | 10 requests/day, all 5 tools |
| Single Tool Pro | $7.99 lifetime | Unlimited InboxForge requests |
| All-Access Suite | $14.99 lifetime | Unlimited requests across all 51 MCP servers |
š Get Pro on Gumroad ā instant license delivery.
Send $7.99 (single) or $14.99 (suite) USDC to:
8sDLX3okSV974wdjdeKhN9uWLZDr45DeGCJ28zgTLEdJ
Then verify: POST https://inboxforge-api.agentweb-hub.workers.dev/verify-solana with {"signature":"<tx_signature>"}.
- Runtime: Cloudflare Workers (global edge, ~0ms cold starts)
- Protocol: MCP via streamable HTTP (
/mcp), JSON-RPC 2.0 - Spec: protocol
2024-11-05, fullinputSchema+outputSchema+ annotations on every tool - Health:
GET /health
InboxForge is part of a 51-server autonomous MCP suite ā SEO, databases, security, video, design, courses, agencies, personal brands and more:
MIT ā build freely.