api.strale.io

Validate an ISBN-10 or ISBN-13 number. Checks format, length, and checksum. Converts ISBN-10 to ISBN-13. Pure algorithmic — instant.

last updated: Jun 18, 2026 · type: http · x402 v1

Network	Scheme	Amount	Pay To
Base	exact	n/a	0x66D7...83bC

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Jun 18, 2026