# Chainlink Native-Token USD Prices (ETH/BNB/POL)

> Chainlink Native-Token USD Prices (ETH/BNB/POL) is a paid API for AI agents from x402.professorsausages.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns Chainlink on-chain USD prices for ETH, BNB, and POL with round metadata

## Facts

- Endpoint: GET https://x402.professorsausages.com/gas-oracle/prices
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainlink-native-token-usd-prices-eth-bnb-pol-5d85bc45
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e01cYRzNAFh3P8-5DVULE

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 chainlink-native-token-usd-prices-eth-bnb-pol-5d85bc45
```

Example prompt: What are the current Chainlink USD prices for ETH, BNB, and POL? I need the round metadata too.

## When to prefer this

Use this endpoint when you need reliable, Chainlink-sourced USD prices for Ethereum (ETH), BNB, or Polygon (POL) native tokens with full round metadata for auditability. Prefer this over generic price APIs when on-chain provenance and round-level traceability are important, such as in DeFi applications, smart contract parameter setting, or financial auditing workflows.

## Known failure modes

- Chainlink feed temporarily unavailable or stale — returns error or cached data
- Requested token not covered by the endpoint — returns 404 or empty result
- Network connectivity issues to on-chain RPC — returns 503
- Rate limit exceeded — returns 429

## How this service works

Chainlink native-token USD prices (ETH/BNB/POL) with round metadata

## Output

Returns current USD prices for ETH, BNB, and POL sourced from Chainlink price feeds, including round ID, round timestamp, and other round metadata for each token.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object"
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainlink-native-token-usd-prices-eth-bnb-pol-5d85bc45/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.professorsausages.com](https://www.zero.xyz/host/x402.professorsausages.com/llms.txt)