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Stride20k Email Validation
x402
Stride20k Email Validation is a paid API for AI agents from gateway.stride20k.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).
Validates an email address by checking RFC syntax and performing live MX-record DNS lookup to determine deliverability
Price / call$0.005
Success—
StatusUnknown
How this service works
Agent data gateway plus the live x402 market feed. Normalized, schema-stable JSON for crypto prices, DeFi TVL, on-chain DEX pools, gas, FX, US Treasury yields, US weather, WHOIS, DNS, email validation, web-page extraction, tech news, Wikipedia, npm/PyPI package health, ERC-20 token-risk scoring, and composed domain dossiers, plus x402 ecosystem analytics and metered LLM inference. Pay per call with USDC via the x402 protocol; no accounts, no API keys.
Output
Returns a JSON object containing: whether the email syntax is valid (syntaxValid), whether MX records exist (hasMx), an array of MX records with exchange hostname and preference values, whether an A-record fallback applies (aFallback), whether the address appears deliverable (deliverable), the parsed domain, the original email, and metadata including cache status, data source, and fetch timestamp.
Example use cases
Pre-send email deliverability check
“Before I send this campaign, check whether support@newsletters.example.com is actually deliverable — does the domain have proper mail servers set up?”
User signup email verification
“A new user just submitted j.doe@fastmail.fm during signup — can you confirm it's syntactically valid and that the domain can actually receive mail?”
Lead list email hygiene
“I have a lead email address info@startup.io — validate it for me and tell me whether it has MX records and is likely to accept mail.”
Technical details
Endpoint
GEThttps://gateway.stride20k.com/email/validate/%7Bemail%7DWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call email validation with both RFC syntax checking and live DNS MX-record resolution in a single call, with no API key or account setup. Prefer it over heavyweight email verification services when you want schema-stable JSON output and per-call USDC micropayment billing via x402. Best for agents that need on-demand validation of individual email addresses during onboarding flows, lead enrichment, or pre-send hygiene checks.
Side effects
- Malformed or missing email parameter returns error
- Domain with no MX or A records returns hasMx:false and deliverable:false
- DNS resolution timeout from Cloudflare DoH yields fetch error
- Syntactically invalid email short-circuits before DNS lookup
- Cached results may not reflect very recent DNS changes (meta.cached:true)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"data": {
"mx": [
{
"exchange": "mail.example.com",
"preference": 10
}
],
"email": "postmaster@example.com",
"hasMx": true,
"domain": "example.com",
"aFallback": false,
"deliverable": true,
"syntaxValid": true
},
"meta": {
"cached": false,
"source": "local + Cloudflare DoH",
"fetchedAt": "2026-07-04T00:00:00.000Z",
"attribution": null
},
"endpoint": "/email/validate/:email"
}
}Tags
x402
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