Email Verification API
4 endpoints for real-time email verification: single verify, bulk verify (up to 100), domain check, MX lookup. Each call runs syntax validation, MX resolution, SMTP RCPT probe, catch-all detection, disposable check against 3500+ domains, role-based pattern detection (45+ patterns), free provider classification, typo suggestion, and a 0–100 quality score. Verdict: valid / invalid / risky / unknown.
1 of 4 routes settlement-verified · $0.001 USDC/request · 4 endpoints / 4 tools · Verification · base network · x402 protocol
Verified routes
/verify· $0.001 · 2026-08-03 · receipt
Other routes are unverified.
Networks: Base (settlement-verified)
Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.
url https://payapi.market/mcpValidate email addresses: syntax, MX records, disposable-domain and catch-all detection. Single, bulk and domain checks.
Endpoints
POST /verify: Verify a single email: syntax, MX, disposable and role-account checks. ($0.001)POST /bulk-verify: Verify a list of emails in one call. ($0.001)POST /domain-check: Check whether a domain can receive email. ($0.001)POST /mx-lookup: Return the MX records for a domain. ($0.001)
Example request
curl -X POST https://email.payapi.market/verify \
-H 'content-type: application/json' \
-d '{"email":"jane.doe@gmail.com"}'
Example response
{
"email": "jane.doe@gmail.com",
"valid": true,
"syntax_valid": true,
"mx_found": true,
"disposable": false,
"role_account": false,
"free_provider": true
}
How an agent calls this
Is jane.doe@gmail.com a valid, non-disposable email address?
An MCP-connected agent discovers this API, picks it for the task, and pays per call in USDC. No keys, no account.
About this API
Email Verification API is listed in the Verification category with pricing at $0.001 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-08-03. View receipt on Basescan.
Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.
This API exposes 4 endpoints. Only the verified route has been tested by PayAPI Market. Other routes are unverified.
How to call this API
Every protected route returns HTTP 402 with x402 payment requirements. An agent pays the stated USDC amount on Base and retries with the payment header. No API keys, no accounts. Browse the marketplace or list your own API.
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