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mailcheck-dx Email Validation API
x402
mailcheck-dx Email Validation API is a paid API for AI agents from mailcheck-dx.hugen.tokyo, paid per call via x402, $0.005/call, status down (last checked 2026-09-14, last successful call 2026-05-06).
Validates an email address by checking syntax, MX records, disposability, role-based status, and typos, returning a quality score
Price / call$0.005
Success40%
StatusDown
How this service works
Paid email validation API that verifies addresses and accepts multi-chain crypto payments (EIP-8453 USDC and Solana) with configurable timeouts.
Output
Returns a JSON object with a numeric score (0-1), the email's domain, an overall status (valid/invalid/etc.), MX records found, flags for whether the address is disposable, role-based, or from a free provider, syntax validity, a did-you-mean suggestion for typos, and a list of all checks performed.
Example use cases
Clean up user signup database
“I need to validate all the email addresses in my user registration list and flag any that are disposable, role-based, or have typos. Can you check each one and give me a quality score so I know which accounts might be spam or fake?”
Verify customer emails before outreach
“Before sending our marketing campaign, can you validate these email addresses and tell me which ones have valid MX records and aren't from free providers? I want to make sure we're only contacting real business accounts.”
Detect typos in email submissions
“Our form keeps getting email addresses with small typos in them. Can you validate this batch of emails and suggest corrections for any that look like they have misspellings in the domain or local part?”
Technical details
Endpoint
POSThttps://mailcheck-dx.hugen.tokyo/validateWhen to prefer
Use this endpoint when you need a comprehensive, multi-check email validation (syntax + MX + disposable + typo detection) in a single call with a configurable timeout, especially when integrating into workflows that accept crypto payments. Prefer over simpler regex-only validators when deliverability and spam prevention matter.
Side effects
- Timeout exceeded: MX or SMTP checks may not complete within the specified timeout, returning partial results
- Invalid input: missing required 'email' or 'timeout' fields returns a 400-level error
- Unreachable domain: domain may not exist or DNS lookup fails, resulting in mx_found=false
- Payment failure: insufficient USDC balance or unsupported payment chain results in 402 error
- Temporary DNS errors: transient MX lookup failures may give false negatives
Input
{
"email": "test@example.com",
"timeout": 5000
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| emailrequired | string | |
| timeoutrequired | number |
Output
{
"email": "test@example.com",
"score": 1,
"domain": "example.com",
"status": "valid",
"is_free": false,
"mx_found": true,
"mx_records": [
""
],
"did_you_mean": null,
"syntax_valid": true,
"is_disposable": false,
"is_role_based": false,
"checks_performed": [
"syntax",
"mx",
"disposable",
"free",
"role",
"typo"
]
}Tags
x402
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