# Datakoot Email Deliverability Checker

> Datakoot Email Deliverability Checker is a paid API for AI agents from x402.datakoot.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Checks email deliverability for a domain or email address by looking up SPF, DMARC, and MX records to determine if mail can be received

## Facts

- Endpoint: POST https://x402.datakoot.com/api/email_deliverability?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/datakoot-email-deliverability-checker-f95ba94f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q7VF7D2Rs7R0ldWe4KJGj

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability datakoot-email-deliverability-checker-f95ba94f -d '<json body>'
```

Example prompt: Can you check whether stripe.com has SPF and DMARC properly configured and whether it can actually receive email?

## When to prefer this

Choose this endpoint when you need a quick, structured lookup of email infrastructure records (SPF, DMARC, MX) for a given domain or email address — especially useful for pre-send deliverability checks, fraud detection, or diagnosing email bounce issues. At $0.002 per call it is cost-effective for on-demand single lookups; for high-volume or batch use consider the free MCP tier (100 calls/day).

## Known failure modes

- Domain does not exist or has no DNS records — may return empty fields or can_receive_mail: false
- Invalid input format (neither a valid domain nor email address) — likely returns a 4xx validation error
- DNS lookup timeout for a slow or unresponsive nameserver — may result in partial or failed response
- Private or internal domains with no public DNS records will not resolve

## How this service works

48 live public-data tools (security, packages, SEC filings, economy, FX, weather, domains, Federal Register, Base) for AI agents. $0.002 USDC per call on Base via x402, charged only on success. The same tools are free for 100 calls/day via MCP at <server>.datakoot.com/mcp.

## Output

Returns a JSON object containing the domain name, SPF record string and whether it was successfully checked, DMARC record string and policy (e.g. 'reject', 'quarantine', 'none') and whether it was checked, a list of MX host addresses, and a boolean indicating whether the domain can receive mail.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain_or_email": {
   "type": "string",
   "description": "A domain (stripe.com) or an email address (a@stripe.com)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "spf": "v=spf1 include:_spf.google.com ~all",
  "domain": "google.com",
  "mx_hosts": [
   "smtp.google.com."
  ],
  "spf_checked": true,
  "dmarc_policy": "reject",
  "dmarc_record": "v=DMARC1; p=reject; rua=mailto:mailauth-reports@google.com",
  "dmarc_checked": true,
  "can_receive_mail": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/datakoot-email-deliverability-checker-f95ba94f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.datakoot.com](https://www.zero.xyz/host/x402.datakoot.com/llms.txt)