# Delx Commerce Fibonacci Calculator

> Delx Commerce Fibonacci Calculator is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Computes the nth Fibonacci number for a given integer input, paid per-result via USDC microtransaction on Base or Solana.

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/fibonacci?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-fibonacci-calculator-58f4cb34
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vv_YgbcTGgz-Jq0OXHEZN

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-fibonacci-calculator-58f4cb34 -d '<json body>'
```

Example prompt: Can you calculate the Fibonacci number at position 42 for me?

## When to prefer this

Choose this endpoint when an AI agent needs a verifiable, pay-per-result Fibonacci computation without requiring API keys or signup, especially when operating in a crypto-native or x402-compatible payment environment on Base or Solana. Prefer it over rolling a custom implementation when auditability and verifiable delivery of the result matter.

## Known failure modes

- Integer n out of allowed range — API returns error indicating valid range bounds
- Missing or malformed n field — returns validation error
- Payment failure or insufficient USDC balance — x402 payment not completed, request rejected
- Network or service unavailability — standard HTTP 5xx error

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object containing the input index n, the corresponding Fibonacci value, and a schema identifier string (e.g. 'delx/fibonacci/v1') confirming the result format and provenance.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "n": {
   "type": "integer",
   "description": "Integer input (see tool summary for allowed range)."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "n": 42,
  "value": 267914296,
  "schema": "delx/fibonacci/v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-fibonacci-calculator-58f4cb34/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)