# Cardano Price API (x402)

> Cardano Price API (x402) is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Returns the current USD price of Cardano (ADA) cryptocurrency, paid per call via x402/USDC on Base with no API key required.

## Facts

- Endpoint: GET https://anibalb.duckdns.org/x402/cardano-price?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cardano-price-api-x402-e6d65c11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xVnIWmXraKorw_fNsgqWP

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 cardano-price-api-x402-e6d65c11
```

Example prompt: What's the current price of Cardano in USD? Pay the micro-fee automatically — no API key needed.

## When to prefer this

Choose this endpoint when you need a quick, low-cost, keyless Cardano price lookup and are already operating within an x402/USDC micropayment environment on Base. Ideal for agents that need on-demand spot prices without committing to a subscription or managing API credentials. Not ideal if you need historical price data, OHLCV candles, or prices for many assets in a single call.

## Known failure modes

- Payment failure if USDC balance on Base is insufficient or x402 payment header is malformed
- Stale or delayed price data if the underlying data source is lagging
- HTTP 402 if payment is not provided
- HTTP 500 if the upstream price feed is unavailable
- No authentication errors since no API key is required

## How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

## Output

A JSON object containing the coin name ('cardano') and its current price in USD as a numeric value, e.g. {"coin":"cardano","price_usd":0.45}.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "cardano",
  "price_usd": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cardano-price-api-x402-e6d65c11/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from anibalb.duckdns.org](https://www.zero.xyz/host/anibalb.duckdns.org/llms.txt)