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io.github.Integrity-Os/deliverability-doctor

Registre officiel Santé

Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

Code source Documentation

Que pouvez-vous faire avec io.github.Integrity-Os/deliverability-doctor ?

  • check_email_security(domain) — SPF (incl. RFC 7208 multiple-record permerror
  • compare_email_security(domains[2..5]) — comparison table with grades.

Installation

Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http deliverability-doctor 'https://deliverability-doctor.deliverability-doctor.workers.dev/mcp'
Configuration JSON (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "deliverability-doctor": {
            "type": "http",
            "url": "https://deliverability-doctor.deliverability-doctor.workers.dev/mcp"
        }
    }
}

Documentation

Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.

Sommaire
  1. Deliverability Doctor
  2. Tools
  3. Design decisions
  4. Run
  5. Status 2026-08-23
  6. Monetization path

Deliverability Doctor

Remote MCP server: "Can my domain be email-spoofed?" answered from public DNS, graded, with concrete fixes. Connectable to Claude (custom connector) and ChatGPT (Apps SDK / MCP connector) — both speak MCP, one server serves both.

Tools

  • check_email_security(domain) — SPF (incl. RFC 7208 multiple-record permerror and redirect= handling), DMARC (policy, rua, pct), MX, DKIM at 7 common selectors. Graded A–F report, fixes per finding, upsell line only when problems exist. Accepts bare domain, URL, or email address.
  • compare_email_security(domains[2..5]) — comparison table with grades.

Design decisions

  • Authless: reads public DNS only, stores nothing, takes nothing but a domain. Lowest possible connect friction; nothing sensitive to protect.
  • DNS-over-HTTPS (Cloudflare → Google fallback): identical code runs on local Node and on Cloudflare Workers — no dns module dependency.
  • Stateless streamable HTTP: fresh transport per request, no sessions; safe to scale, trivial for clients.
  • NXDOMAIN is refused, not graded — "domain doesn't exist" ≠ "spoofable".
  • Verified against known postures before first run: gmail.com (redirect= must not be flagged), n8n.io (must grade A on p=reject), missing-everything domain (must grade F), NXDOMAIN (must refuse).

Run

npm install
node server.js          # :8787/mcp

Quick public demo: cloudflared tunnel --url http://localhost:8787 → use https://<random>.trycloudflare.com/mcp as the connector URL.

Status 2026-08-23

  • Local: end-to-end MCP verified (initialize / tools/list / tools/call).
  • Public: live via quick tunnel, initialize verified from the public URL.
  • Durable hosting: pending — Cloudflare Workers deploy needs Kacper's account (~5 min). Tunnel URL dies with the process/PC.
  • Directory submissions (Anthropic connector directory, ChatGPT apps): need the durable URL first, then Kacper's developer accounts.

Monetization path

Free tool = distribution. Report links the $99 written audit (niekonieczny.gumroad.com/l/vscjt) only when problems are found. NOTE: Gumroad payouts currently frozen on Stripe KYC — unfreeze before promoting.

Questions fréquentes

Qu'est-ce que io.github.Integrity-Os/deliverability-doctor ?

Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

Comment installer io.github.Integrity-Os/deliverability-doctor ?

Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport http deliverability-doctor 'https://deliverability-doctor.deliverability-doctor.workers.dev/mcp'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.

Faut-il une clé API pour io.github.Integrity-Os/deliverability-doctor ?

Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.

io.github.Integrity-Os/deliverability-doctor est-il open source ?

Oui. Son code est sur GitHub sous licence MIT.

Qui maintient io.github.Integrity-Os/deliverability-doctor ?

Il est publié par Integrity-Os. AI.tn le référence sans le maintenir ni le recommander.

Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.