How to Check a Domain’s SPF, DKIM and DMARC With One API Call

Follow the steps below and use the linked tools and references as you go.

Evidence trail: Email Domain Doctor API on RapidAPI · Web Content & URL Tools MCP Server on Apify

Mail from a domain without SPF and DMARC lands in spam or gets spoofed. One GET request checks MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT and BIMI and returns a grade with fixes.

Subscribe to the free plan on RapidAPI, then call the endpoint with your RapidAPI key:

curl -G 'https://email-domain-doctor.p.rapidapi.com/v1/email-domain' 
  --data-urlencode 'domain=stripe.com' 
  -H 'x-rapidapi-host: email-domain-doctor.p.rapidapi.com' 
  -H 'x-rapidapi-key: YOUR_RAPIDAPI_KEY'

We ran this exact call against stripe.com while writing this post. The key fields of the real response:

{
  "grade": "B",
  "score": 78,
  "summary": {
    "mx": "pass",
    "spf": "pass",
    "dmarc": "pass",
    "dkim": "warn",
    "mta_sts": "warn",
    "tls_rpt": "warn",
    "bimi": "info"
  }
}

import requests

resp = requests.get(
    'https://email-domain-doctor.p.rapidapi.com/v1/email-domain',
    params={'domain': 'stripe.com'},
    headers={'x-rapidapi-host': 'email-domain-doctor.p.rapidapi.com', 'x-rapidapi-key': 'YOUR_RAPIDAPI_KEY'},
    timeout=30,
)
resp.raise_for_status()
print(resp.json())

• Check your own domain before a newsletter or cold-email campaign.
• Audit client domains for spoofing risk in one pass.
• Catch an SPF record that exceeds the 10-lookup limit.

• DKIM can only be checked for selectors it knows or that you pass in; there is no way to list every selector a domain uses.
• It reads public DNS; it does not send test mail.

The same endpoint is one of the tools in the Web Content & URL Tools MCP Server on Apify. Point any client that supports remote MCP servers at `https://avalonai–web-content-url-tools-mcp.apify.actor/mcp` with your Apify token (`YOUR_APIFY_TOKEN`) and the agent can call it directly: https://apify.com/avalonai/web-content-url-tools-mcp

Email Domain Doctor API on RapidAPI (free plan available): https://rapidapi.com/avalonai/api/email-domain-doctor

Our APIs on RapidAPI: https://rapidapi.com/user/avalonai

• Email Domain Doctor API — produced the example response in this tutorial (run against stripe.com): https://rapidapi.com/avalonai/api/email-domain-doctor