{
"email": "[email protected]",
"valid": true,
"score": 90,
"verdict": "valid",
"checks": {
"syntax": true,
"domainExists": true,
"mxFound": true,
"disposable": false,
"roleAccount": true,
"freeProvider": true
},
"mxRecords": [
"gmail-smtp-in.l.google.com",
"alt2.gmail-smtp-in.l.google.com",
"alt3.gmail-smtp-in.l.google.com",
"alt1.gmail-smtp-in.l.google.com",
"alt4.gmail-smtp-in.l.google.com"
],
"suggestion": null,
"typoLikely": false,
"domainAgeDays": 11410,
"domainAgeSource": "RDAP",
"catchAllRisk": "low",
"note": "Domain-level validation only: syntax, domain/MX health, disposable and provider risk. Mailbox existence is not probed (no SMTP check), so a valid result does not confirm the mailbox exists. The score is a domain risk score.",
"scope": "domain-level"
}
curl --location --request GET 'https://zylalabs.com/api/14771/email+list+validation+api/38267/[email protected]' --header 'Authorization: Bearer YOUR_API_KEY'
{
"email": "[email protected]",
"valid": true,
"score": 90,
"verdict": "valid",
"checks": {
"syntax": true,
"domainExists": true,
"mxFound": true,
"disposable": false,
"roleAccount": true,
"freeProvider": true
},
"mxRecords": [
"alt2.gmail-smtp-in.l.google.com",
"gmail-smtp-in.l.google.com",
"alt3.gmail-smtp-in.l.google.com",
"alt4.gmail-smtp-in.l.google.com",
"alt1.gmail-smtp-in.l.google.com"
],
"suggestion": null,
"typoLikely": false,
"domainAgeDays": 11410,
"domainAgeSource": "RDAP",
"catchAllRisk": "low",
"note": "Domain-level validation only: syntax, domain/MX health, disposable and provider risk. Mailbox existence is not probed (no SMTP check), so a valid result does not confirm the mailbox exists. The score is a domain risk score.",
"scope": "domain-level"
}
curl --location --request POST 'https://zylalabs.com/api/14771/email+list+validation+api/38268/validate+email+via+post' --header 'Authorization: Bearer YOUR_API_KEY'
--data-raw '{"email": "[email protected]"}'
{
"scope": "domain-level",
"note": "Domain-level validation only: syntax, domain/MX health, disposable and provider risk. Mailbox existence is not probed (no SMTP check), so a valid result does not confirm the mailbox exists. The score is a domain risk score.",
"results": [
{
"email": "[email protected]",
"valid": true,
"score": 90,
"verdict": "valid",
"checks": {
"syntax": true,
"domainExists": true,
"mxFound": true,
"disposable": false,
"roleAccount": true,
"freeProvider": true
},
"mxRecords": [
"alt3.gmail-smtp-in.l.google.com",
"gmail-smtp-in.l.google.com",
"alt1.gmail-smtp-in.l.google.com",
"alt2.gmail-smtp-in.l.google.com",
"alt4.gmail-smtp-in.l.google.com"
],
"suggestion": null,
"typoLikely": false,
"domainAgeDays": 11410,
"domainAgeSource": "RDAP",
"catchAllRisk": "low",
"note": "Checks domain mail routing (MX) and risk signals. Does not probe individual mailbox existence. Catch-all risk is a risk signal based on MX/provider patterns, not a probing conclusion."
},
{
"email": "invalid-email",
"valid": false,
"score": 0,
"verdict": "invalid",
"checks": {
"syntax": false
},
"mxRecords": [],
"suggestion": null,
"typoLikely": false,
"domainAgeDays": null,
"domainAgeSource": null,
"catchAllRisk": "unknown"
}
],
"summary": {
"total": 2,
"valid": {
"count": 1,
"percent": 50
},
"risky": {
"count": 0,
"percent": 0
},
"invalid": {
"count": 1,
"percent": 50
},
"disposable": {
"count": 0,
"percent": 0
},
"typoLikely": {
"count": 0,
"percent": 0
}
}
}
curl --location --request POST 'https://zylalabs.com/api/14771/email+list+validation+api/38269/validate+email+batch' --header 'Authorization: Bearer YOUR_API_KEY'
--data-raw '{"emails": ["[email protected]", "invalid-email"]}'
After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the Email List Validation API simply include your bearer token in the Authorization header.
| Header | Description |
|---|---|
Authorization
|
Required
Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.
|
No long-term commitment. Upgrade, downgrade, or cancel anytime.
Email validation API with honest domain-level scope: syntax, MX, disposable and role signals, typo suggestions, domain age and a 0-100 score. Single and batch up to 100.
No. It checks domain mail routing (MX), registration data and risk signals at domain level. Mailbox-level probing is unreliable — major providers reject or greylist it — so we do not do it and do not claim it.
A 0–100 domain risk score. It starts at 100 and is reduced for missing MX, unknown domains, disposable domains, role accounts and likely typos; verdicts are valid (≥80 with MX present), risky (50–79, or a likely typo) and invalid.
Up to 100. A bad entry marks only itself invalid; the batch itself still succeeds, and the summary reports counts and percentages per verdict.
Every result carries domainAgeDays, computed from the domain's real RDAP registration date. When RDAP has no record for a domain, the field returns null and says so — the value is never estimated.
CatchAllRisk is a risk signal based on MX/provider patterns. It is labelled as such and never presented as a probed conclusion — mailbox existence is not probed.
To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
The free trial lasts for 7 days and allows you to make up to 50 API requests.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
You can monitor your API usage through the response headers included with every request:
x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.
Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.
Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.
Please have a look at our Refund Policy: https://zylalabs.com/terms#refund