Discover / email.openverbs.com

Validate email

■ Challenge detected

Validate an email address — syntax, MX/A deliverability lookup, and disposable / role-based address detection. No mailbox probing.

x402
Base
USDC

Listed price: $0.006
Challenge detected: 10 of the last 10 checks
Median response: 180 ms
Last checked: 17 Oct, 08:59 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://email.openverbs.com/v1/validate
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

POSThttps://email.openverbs.com/v1/validate$0.006Validate an email address — syntax, MX/A deliverability lookup, and disposable / role-based address detection. No mailbox probing.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/email.openverbs.com

Recent checks

30 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.17 Oct 2026

All 10 checks

When (UTC)	Result	HTTP	Response
17 Oct, 08:59 UTC	Challenge detected	402	436ms
16 Oct, 08:13 UTC	Challenge detected	402	178ms
14 Oct, 23:56 UTC	Challenge detected	402	164ms
13 Oct, 14:18 UTC	Challenge detected	402	170ms
11 Oct, 12:57 UTC	Challenge detected	402	187ms
10 Oct, 00:46 UTC	Challenge detected	402	198ms
8 Oct, 21:32 UTC	Challenge detected	402	181ms
7 Oct, 18:39 UTC	Challenge detected	402	194ms
6 Oct, 15:34 UTC	Challenge detected	402	162ms
30 Sept, 05:03 UTC	Challenge detected	402	164ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 08:59 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Validate email?

Its listed price is $0.006.

What payment terms does Validate email advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Validate email listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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