Discover / checkdigit.openverbs.com

EAN / UPC / GTIN check

■ Challenge detected

Validate a GTIN barcode number — EAN-8, UPC-A (12), EAN-13 or GTIN-14 — by the standard mod-10 check digit. Length selects the scheme.

Listed price
$0.002
Challenge detected
1 of the last check
Median response
242 ms
Last checked
14 Oct, 21:21 UTC
In our index since
14 Oct 2026

Endpoint

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

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

Recent checks

14 Oct 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.14 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
14 Oct, 21:21 UTCChallenge detected402242ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 14 Oct, 21:21 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 EAN / UPC / GTIN check?

Its listed price is $0.002.

What payment terms does EAN / UPC / GTIN check 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 EAN / UPC / GTIN check listed?

In x402 Bazaar. Superstables first indexed it on 14 Oct 2026.

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