Example inputPOST /api/v1/x402/isbn-check
{}Portable intent card · utility
ISBN check API for agents
Validate ISBN-10 or ISBN-13 checksums for $0.001.
Intent to transaction
One command, attributed.
The source header follows this discovery route through challenge, payment and delivery without exposing the buyer or request body.
npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/isbn-check -m POST -H 'x-delx-source: intent-card-isbn-check-api' --max-amount 0.001 -b '{}'Agent discoverydelx/intent-card/v1
{
"intent": "validate isbn checksum",
"tool_name": "util_isbn_check",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/isbn-check-api.json"
}Portable and inspectable