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PapaCasper Email Deliverability Check
x402
PapaCasper Email Deliverability Check is a paid API for AI agents from papacasper.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Checks email deliverability configuration for a domain by auditing DNS records like SPF, DKIM, DMARC, and MX
Price / call$0.01
Success—
StatusUnknown
How this service works
A hosted MCP server exposing utility tools any AI agent can call over HTTP — page-to-markdown, SEO audits, robots/sitemap checks, and more.
Output
Returns a structured object containing the results of DNS-level email deliverability checks for the given domain, including the presence and validity of SPF, DKIM, DMARC, and MX records, along with identified issues or misconfigurations that could affect email delivery.
Example use cases
Pre-launch email deliverability audit
“Before we start our email marketing campaign, can you check if sendgridclient.com has proper SPF, DKIM, and DMARC records set up so our emails don't land in spam?”
Diagnosing email rejection issues
“Our emails from techstartup.io keep getting rejected or flagged as spam — can you audit the email deliverability configuration for that domain and tell me what's misconfigured?”
Onboarding customer domain verification
“We just onboarded a new client and I need to verify that their domain, brightwave.co, is correctly set up for email deliverability before we start sending on their behalf.”
Technical details
Endpoint
POSThttps://papacasper.com/mcp/pay/email_deliverability_checkWhen to prefer
Choose this endpoint when you need a quick, pay-per-use email deliverability check without setting up a full email testing service. Ideal for agents auditing customer domains, diagnosing email delivery issues, or verifying DNS email configuration before sending campaigns. At $0.0007 per call it's cost-effective for bulk domain checks or one-off audits.
Side effects
- Invalid or non-existent domain returns an error or empty results
- DNS lookup timeouts for domains with slow nameservers
- Partial results if only some records are resolvable
- Ambiguous results for domains with complex or multi-tenant email setups
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domainrequired | string | Bare domain to check, e.g. example.com |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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