Mail Security Tools API

Free DMARC, SPF, DKIM and MX checks for any domain, from mailsecuritytools.com. Paid (x402 USDC on Base): a $0.01 graded email security score, a $0.01 email address check, a $0.50 bulk score of up to 100 domains, a $0.30 prepaid 30-day watch of up to 25 domains (webhook POST when SPF, DKIM, DMARC or MX changes or breaks), and a $1 email security fix plan with the exact DNS records to publish. MCP server at /mcp. Daily monitoring: InboxGuards (inboxguards.com). Credit: 402 Index (MIT)

Listed · $0.04 USDC/request · 1 endpoint · Tools · base network · x402 protocol

Networks: Base (accepted)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

Listing facts

Provider

Unclaimed

Hosted at

api.mailsecuritytools.com

Category

Tools

Price

$0.04 USDC per request

Endpoints

1

Payment networks

Base

Settlement-verified

Not yet. Listed, not paid for by PayAPI Market.

Listed on PayAPI Market

2026-10-30

About this API

Mail Security Tools API is listed in the Tools category with pricing at $0.04 USDC/request.

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.

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Questions about this API

What does Mail Security Tools API do?

Free DMARC, SPF, DKIM and MX checks for any domain, from mailsecuritytools.com. Paid (x402 USDC on Base): a $0.01 graded email security score, a $0.01 email address check, a $0.50 bulk score of up to 100 domains, a $0.30 prepaid 30-day watch of up to 25 domains (webhook POST when SPF, DKIM, DMARC or MX changes or breaks), and a $1 email security fix plan with the exact DNS records to publish. MCP server at /mcp. Daily monitoring: InboxGuards (inboxguards.com). Credit: 402 Index (MIT) It is provided by Unclaimed.

How much does Mail Security Tools API cost?

Mail Security Tools API is priced at $0.04 USDC per request, paid per call with no subscription. The exact amount for each call is in the HTTP 402 response before any money moves.

Do I need an API key or account to use Mail Security Tools API?

No. Mail Security Tools API uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.

Has Mail Security Tools API been verified?

Not yet. Mail Security Tools API is listed and answers an x402 payment challenge, but PayAPI Market has not paid for a call to it, so it carries no settlement-verified badge.

How does an AI agent find Mail Security Tools API?

Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.

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