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The Stall Email Verify
x402
The Stall Email Verify is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-11).
Validates an email address for format correctness and deliverability using a pay-per-call x402 API requiring no account or API key
Price / call$0.006
Success—
StatusUnknown
How this service works
Email address validation and quality scoring. Checks RFC-5322 syntax, detects disposable/throwaway domains (via Kickbox free API), and verifies DNS MX record presence (via Cloudflare DoH). Returns a quality score (0-100) and verdict: DELIVERABLE | RISKY | UNDELIVERABLE | INVALID. Useful for lead qualification, form validation, and filtering bot signups.
Output
Returns a validation result indicating whether the given email address is properly formatted and likely deliverable, potentially including details such as domain validity, MX record presence, disposable email detection, or syntax errors.
Example use cases
Example prompt
“Can you verify whether 'john.doe@acmecorp.com' is a valid, deliverable email address before I add it to our outreach list?”
Technical details
Endpoint
GEThttps://the-stall.intuitek.ai/cap/email-verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, no-account-required email validation check paid per-call in USDC, ideal for agents that only occasionally need to verify emails without committing to a subscription-based email validation API.
Side effects
- Missing required 'email' query parameter — returns 400 or error response
- Malformed email string passed — may return invalid format error
- Payment not completed via x402 USDC on Base — returns 402 Payment Required
- Network timeout or upstream service unavailability — returns 5xx error
- Disposable or role-based email detection may produce false positives
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"email": "test@example.com"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
{
"email": "test@example.com",
"flags": [],
"domain": "example.com",
"verdict": "DELIVERABLE",
"mx_check": {
"has_mx": true,
"mx_records": [
{
"host": ".",
"priority": 0
}
]
},
"local_part": "test",
"generated_at": "2026-06-18T06:25:28.011Z",
"syntax_valid": true,
"is_disposable": false,
"quality_score": 100
}Tags
x402
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