Agent Extraction API: Email check without SMTP (syntax, MX, disposable)

Email address check WITHOUT sending mail or SMTP probing: RFC-style syntax check, domain MX/A records via DNS-over-HTTPS, disposable-domain flag (CC0 blocklist, ~9,900 domains), role-address flag (info@, support@...), free-mail flag. Verdict: deliverable_domain | risky | invalid. Cannot confirm that the mailbox itself exists. Addresses are not stored or logged.

1 route settlement-verified · $0.002 USDC/request · 1 endpoint · Tools · base network · x402 protocol

Verified routes

• GET /api/email-verify · $0.002 · 2026-10-29 · 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/mcp

Listing facts

Provider

FreeTier Agent API

Hosted at

freetier-agent-api.pages.dev

Category

Tools

Price

$0.002 USDC per request

Payment networks

Base

Settlement-verified

1 route, last checked 2026-10-29

Listed on PayAPI Market

2026-10-29

Try Agent Extraction API: Email check without SMTP (syntax, MX, disposable)

Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.

curl -i "https://freetier-agent-api.pages.dev/api/email-verify?email=jane.doe%40example.com&nofree=1"

About this API

Agent Extraction API: Email check without SMTP (syntax, MX, disposable) is listed in the Tools category with pricing at $0.002 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-10-29. 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.

Questions about this API

What does Agent Extraction API: Email check without SMTP (syntax, MX, disposable) do?

Email address check WITHOUT sending mail or SMTP probing: RFC-style syntax check, domain MX/A records via DNS-over-HTTPS, disposable-domain flag (CC0 blocklist, ~9,900 domains), role-address flag (info@, support@...), free-mail flag. Verdict: deliverable_domain | risky | invalid. Cannot confirm that the mailbox itself exists. Addresses are not stored or logged. It is provided by FreeTier Agent API.

How much does Agent Extraction API: Email check without SMTP (syntax, MX, disposable) cost?

Agent Extraction API: Email check without SMTP (syntax, MX, disposable) is priced at $0.002 USDC per request, paid per call with no subscription. PayAPI Market paid 0.002 USDC for one call to /api/email-verify when it verified the listing. 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 Agent Extraction API: Email check without SMTP (syntax, MX, disposable)?

No. Agent Extraction API: Email check without SMTP (syntax, MX, disposable) 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 Agent Extraction API: Email check without SMTP (syntax, MX, disposable) been verified?

Yes, 1 route. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-10-29.

How does an AI agent find Agent Extraction API: Email check without SMTP (syntax, MX, disposable)?

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.

More Tools APIs · Browse the marketplace · List your own API

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