Audit email domain deliverability: SPF, DKIM, DMARC, MX. Score 0-100. x402.
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Config is the same across clients — only the file and path differ.
{
"mcpServers": {
"email-deliverability": {
"url": "https://email-deliverability.api.klymax402.com/mcp"
}
}
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Email deliverability audit for any domain. SPF, DKIM, DMARC, MX validation with score 0-100 and fix recommendations. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
No automated test available for this server. Check the GitHub README for setup instructions.
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Email deliverability audit for any domain. SPF, DKIM, DMARC, MX validation with score 0-100 and fix recommendations. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"email-deliverability": {
"url": "https://email-deliverability.api.klymax402.com/mcp"
}
}
}
curl "https://email-deliverability.api.klymax402.com/api/audit?domain=..."
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
email_audit_deliverability | GET | /api/audit | $0.012 | Audit email deliverability for a domain — checks SPF, DKIM, DMARC, MX records |
email_audit_deliverability | POST | /api/audit | $0.012 | Audit email deliverability for a domain — checks SPF, DKIM, DMARC, MX records (POST variant) |
email_audit_deliverabilityUse this when you need to audit email deliverability configuration for a domain. Returns structured JSON with authentication record analysis and a deliverability score 0-100.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
domain | string | yes | Domain to audit (e.g. example.com, gmail.com) |
Example response:
{"score":65,"spf":{"found":true,"valid":true,"record":"v=spf1 include:_spf.google.com ~all"},"dkim":{"google":true,"default":false},"dmarc":{"found":true,"policy":"none","record":"v=DMARC1; p=none"},"mx":[{"priority":10,"exchange":"alt1.gmail-smtp-in.l.google.com"}],"recommendations":["Upgrade DMARC policy from none to quarantine","Add DKIM for default selector"]}
When to use: launching email campaigns, onboarding new domains for outreach, or diagnosing inbox placement issues. Essential for email marketers, sales teams, and IT admins managing domain reputation.
Not for: single email validation (use email_verify_address), finding email addresses (use email_find_by_name), domain WHOIS/DNS (use domain_lookup_intelligence).
email_audit_deliverabilityUse this when you need to audit email deliverability configuration for a domain. Returns structured JSON with authentication record analysis and a deliverability score 0-100. POST variant of email_audit_deliverability -- same params passed as JSON body instead of query string.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
domain | string | yes | Domain to audit (e.g. example.com, gmail.com) |
Example response:
{"score":65,"spf":{"found":true,"valid":true,"record":"v=spf1 include:_spf.google.com ~all"},"dkim":{"google":true,"default":false},"dmarc":{"found":true,"policy":"none","record":"v=DMARC1; p=none"},"mx":[{"priority":10,"exchange":"alt1.gmail-smtp-in.l.google.com"}],"recommendations":["Upgrade DMARC policy from none to quarantine","Add DKIM for default selector"]}
When to use: launching email campaigns, onboarding new domains for outreach, or diagnosing inbox placement issues. Essential for email marketers, sales teams, and IT admins managing domain reputation.
Not for: single email validation (use email_verify_address), finding email addresses (use `email_f