Discover / id-validators.x402tookit.com

Identifier Validators

■ Challenge detected

Validate a 9-character CUSIP security identifier check digit and split issuer and issue codes.

Listed price
$0.02
Challenge detected
1 of the last check
Median response
634 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://id-validators.x402tookit.com/cusip-check
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
9 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.

Base URLhttps://id-validators.x402tookit.com

  • GET/orcid-checkNo price listedValidate an ORCID iD (researcher identifier) with its ISO 7064 check character and give the canonical form.
  • GET/gtin-checkNo price listedValidate a UPC-A, EAN-8, EAN-13 or GTIN-14 barcode check digit and name its format.
  • GET/lei-checkNo price listedValidate a 20-character Legal Entity Identifier with the ISO 7064 mod 97-10 check and split its parts.
  • GET/cusip-checkNo price listedValidate a 9-character CUSIP security identifier check digit and split issuer and issue codes.
  • GET/mac-parseNo price listedParse a MAC address in any common notation: canonical forms, OUI, unicast or multicast, universal or local.
  • GET/vin-checkNo price listedValidate a 17-character vehicle VIN check digit and decode region, manufacturer code and model-year candidates.
  • GET/isbn-checkNo price listedValidate an ISBN-10 or ISBN-13 check digit and convert between the two forms.
  • GET/issn-checkNo price listedValidate an ISSN (journal or serial number) check digit and format it with the hyphen.
  • GET/isin-checkNo price listedValidate a securities ISIN check digit and split it into country code and national security number.

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

Showing 9 of 9 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/id-validators.x402tookit.com

Recent checks

21 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.21 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
21 Oct, 00:26 UTCChallenge detected402634ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 21 Oct, 00:26 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 Identifier Validators?

Its listed price is $0.02.

What payment terms does Identifier Validators advertise?

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

Where is Identifier Validators listed?

In x402 Bazaar. Superstables first indexed it on 21 Oct 2026.

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