Example inputPOST /api/v1/x402/is-hex-shape
{
"hex": "0xffaa"
}Portable intent card · chain-primitives-local
Is Hex Shape API for agents
Validate even-length hex (optional 0x). Call when you preflight calldata/hash hex before chain tools. Returns valid boolean 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/is-hex-shape -m POST -H 'x-delx-source: intent-card-is-hex-shape-api' --max-amount 0.001 -b '{"hex":"0xffaa"}'Agent discoverydelx/intent-card/v1
{
"intent": "Is Hex Shape for an agent workflow",
"tool_name": "util_is_hex_shape",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/is-hex-shape-api.json"
}Portable and inspectable