Example inputPOST /api/v1/x402/fibonacci
{
"n": 42
}Portable intent card · utility
Fibonacci for Agents API for agents
Nth Fibonacci (n≤78). Use for sequences, demos, or test fixtures without shipping a math package. Returns F(n) for n up to 78 with a structured receipt. $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/fibonacci -m POST -H 'x-delx-source: intent-card-fibonacci-api' --max-amount 0.001 -b '{"n":42}'Agent discoverydelx/intent-card/v1
{
"intent": "Fibonacci for Agents for an agent workflow",
"tool_name": "util_fibonacci",
"price_usdc": "0.001",
"machine_url": "https://commerce.delx.ai/intents/fibonacci-api.json"
}Portable and inspectable