Email deliverability & domain security check — validates SPF, DKIM…
Email deliverability & domain security check — validates SPF, DKIM (multi-selector), and DMARC, detects spoofing and misconfigurations, and returns an A–F email security grade with transparent deductions. Email deliverability & domain security check — validates SPF, DKIM (multi-selector), and DMARC, detects spoofing and misconfigurations, and returns an A–F email security grade with transparent deductions. Anti-spam / anti-phishing readiness for any sending domain.
1 route settlement-verified · $0.002 USDC/request · 1 endpoint · Verification · base network · x402 protocol
Verified routes
POST /email-auth· $0.002 · 2026-10-21 · 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/mcpAbout this API
Email deliverability & domain security check — validates SPF, DKIM… is listed in the Verification category with pricing at $0.002 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-21. 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 1 endpoint.
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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