Task

Csl Json

1 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

book-record x402 REST usage

Validate one ISBN checksum and return its Open Library edition, work and author records projected into one sourced CSL-JSON book item; invalid or absent ISBNs return an explicit refusal. The FOUR truth reading is true wh...

market.561.group Other services 3 calls / 30d checked 2026-10-26

0.002 USDC per call per call

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