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agentsvc.io Email Verification
x402
agentsvc.io Email Verification is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.0025/call, status unknown (last checked 2026-10-10).
Verifies whether an email address is deliverable by performing SMTP mailbox probing (RCPT TO) and MX record checks without sending any email.
Price / call$0.0025
Success—
StatusUnknown
How this service works
86 APIs for AI agents: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search and more, paid per call with USDC on Base, Solana, Polygon or Arbitrum via x402. No account, no API key, free sample on every service.
Output
Returns a JSON object with: overall deliverability status ('deliverable', 'undeliverable', etc.), SMTP handshake details (MX hostname, SMTP code and message, catch-all probe code), format validity, disposable provider flag, role address flag (e.g. support@, info@), free provider flag, list of MX records, and a timestamp of when the check was performed. No email is actually sent during the check.
Example use cases
Validate leads before CRM import
“Before I upload this list of 200 prospect emails to our CRM, can you verify that hello@acme.com is actually deliverable and not a disposable or fake address?”
Pre-signup email check for SaaS app
“A user just entered john.doe@tempmail.org on our signup form — can you check if it's a real deliverable mailbox or a throwaway disposable address?”
Clean marketing list before campaign
“I'm about to send an email blast — can you verify that newsletter@bigcorp.com is deliverable, not a catch-all, and not a role address so I know it won't bounce?”
Technical details
Endpoint
POSThttps://agentsvc.io/api/v1/proxy/email-verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, per-address email deliverability checks without sending any actual email. It is ideal for pre-send validation, signup form verification, or list hygiene tasks where you need SMTP-level confirmation (not just format checking) and want to detect disposable, role, or catch-all addresses. It is pay-per-call with no account required, making it suitable for sporadic or agent-driven verification workflows on Base/USDC.
Side effects
- Invalid email format returns format_valid:false and likely undeliverable status
- Domain has no MX records — returns undeliverable with no mx_records
- SMTP server times out or refuses connection — may return inconclusive or error status
- Catch-all domains absorb all RCPT TO probes so deliverability can't be confirmed (is_catch_all:true)
- Greylisting or aggressive spam filters may cause temporary failures
- Payment failure via x402 prevents the call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| string | Email address to verify |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"note": "SMTP mailbox probe (RCPT TO). No email was sent.",
"smtp": {
"mx": "github-com.mail.protection.outlook.com",
"code": 250,
"message": "2.1.5 Recipient OK",
"catch_all_code": 452
},
"email": "support@github.com",
"domain": "github.com",
"reason": "mailbox_exists",
"status": "deliverable",
"checked_at": "2026-10-06T16:05:40.287Z",
"mx_records": [
"github-com.mail.protection.outlook.com"
],
"deliverable": true,
"format_valid": true,
"is_catch_all": null,
"is_disposable": false,
"is_role_address": true,
"is_free_provider": false
},
"success": true
}
}Tags
x402
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