Example inputPOST /api/v1/x402/is-prime
{
"n": 42
}Portable intent card · utility
Primality Check for Agents API for agents
Primality check. Call for teaching demos, ID heuristics, or lightweight number filters (bounded integers). Returns whether n is prime with a clear boolean field. $0.001 USDC per successful call via x402 on Base—deterministic first-party JSON, no API key, no subscription, and nothing is billed on structured validation errors.
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-prime -m POST -H 'x-delx-source: intent-card-is-prime-api' --max-amount 0.001 -b '{"n":42}'Agent discoverydelx/intent-card/v1
{
"intent": "Primality Check for Agents for an agent workflow",
"tool_name": "util_is_prime",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/is-prime-api.json"
}Portable and inspectable