Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.
| Endpoint | https://deliverability-doctor.deliverability-doctor.workers.dev/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.2 |
| Now | 2 tools · grade A (100) · pin ts_3a734377625e4351e96e3910f7553811 · protocol 2025-06-18 |
| First / last listed | 2026-11-05 00:04 UTC / 2026-11-05 00:04 UTC |
| Grade over time | 2026-11-05: A (100), 2 tools |
Is this your server? Own a server? ToolFit hosted watch re-checks it every 24 h ($0.25 per 30 days) or 6 h ($0.60) and sends you an HMAC-signed webhook when its tools or grade change: POST https://api.youraitools.co/toolfit/v1/watch. To opt out, see About & opt-out.
Tools: check_email_security compare_email_security
check_email_security | Checks whether a domain can be email-spoofed, using public DNS only. Verifies SPF (including the RFC 7208 multiple-record permerror), DMARC policy and reporting, MX, and DKIM at common selectors. Returns a graded report with concrete fixes. Accepts a bare domain, a URL, or an email address. Nothing is sent to the domain. params: domain* |
compare_email_security | Runs the email-security check on 2–5 domains and returns a comparison table with per-domain grades. Useful for checking your domain against competitors. params: domains* |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.