Example inputPOST /api/v1/x402/nonce-hex
{
"bytes": 8
}Portable intent card · agent-reliability-security
Nonce Hex API for agents
Generate a random hex nonce. Call when you need request nonces for agent idempotency keys. Returns hex nonce and byte length for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.
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/nonce-hex -m POST -H 'x-delx-source: intent-card-nonce-hex-api' --max-amount 0.001 -b '{"bytes":8}'Agent discoverydelx/intent-card/v1
{
"intent": "Nonce Hex for an agent workflow",
"tool_name": "util_nonce_hex",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/nonce-hex-api.json"
}Portable and inspectable