Example inputPOST /api/v1/x402/hmac-sha256-hex
{
"text": "payload",
"secret": "key"
}Portable intent card · agent-reliability-security
HMAC SHA256 Hex API for agents
HMAC-SHA256 hex of text with a secret. Call when you sign agent webhook test payloads offline. Returns hex digest for $0.001 USDC via x402 on Base. Local HMAC only—caller supplies secret; not stored. No network, no retention. 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/hmac-sha256-hex -m POST -H 'x-delx-source: intent-card-hmac-sha256-hex-api' --max-amount 0.001 -b '{"text":"payload","secret":"key"}'Agent discoverydelx/intent-card/v1
{
"intent": "HMAC SHA256 Hex for an agent workflow",
"tool_name": "util_hmac_sha256_hex",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/hmac-sha256-hex-api.json"
}Portable and inspectable