# Vaultfire Chainlink Price Feed Reader

> Vaultfire Chainlink Price Feed Reader is a paid API for AI agents from theloopbreaker.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Reads a Chainlink Data Feed price on Base, Avalanche, Arbitrum, or Polygon and returns the current answer, decimals, roundId, updatedAt timestamp, and freshness status.

## Facts

- Endpoint: GET https://theloopbreaker.com/api/x402/oracle/price-feed
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/theloopbreaker-com-07aaa11f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_29COnASSlzt8OY8JpTFWE

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 theloopbreaker-com-07aaa11f
```

Example prompt: What's the current ETH/USD price from the Chainlink oracle on Base — and is the feed still fresh?

## When to prefer this

Use this endpoint when you need a real-time, decentralized, on-chain Chainlink oracle price for one of the six supported pairs (ETH, BTC, LINK, USDC, AVAX, MATIC vs USD) across Base, Avalanche, Arbitrum, or Polygon — especially when you need round metadata and freshness guarantees from the AggregatorV3 interface, not just a spot price from a centralized exchange API.

## Known failure modes

- Unsupported feed pair returns an error (only ETH/USD, BTC/USD, LINK/USD, USDC/USD, AVAX/USD, MATIC/USD are supported)
- Unsupported network returns an error (only Base, Avalanche, Arbitrum, Polygon)
- Stale data flagged as not fresh if updatedAt is too old
- Payment failure if x402 USDC payment is not included or insufficient
- RPC timeout if the on-chain node is slow to respond

## How this service works

Read any supported Chainlink Data Feed (ETH/USD, BTC/USD, LINK/USD, USDC/USD, AVAX/USD, MATIC/USD) on Base, Avalanche, Arbitrum, or Polygon. Returns answer, decimals, roundId, updatedAt, and freshness status. Data source: Chainlink decentralized oracle network — Vaultfire reads the on-chain AggregatorV3 proxy and exposes it via x402.

## Output

Returns the current price answer (scaled by decimals), the number of decimals, the roundId, the updatedAt timestamp of the latest round, and a freshness status flag indicating whether the data is recent enough to be trusted.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object"
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/theloopbreaker-com-07aaa11f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from theloopbreaker.com](https://www.zero.xyz/host/theloopbreaker.com/llms.txt)