# Basefeed Price – Chainlink Price Feed on Base

> Basefeed Price – Chainlink Price Feed on Base is a paid API for AI agents from basefeed-price.higgsfield.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).

Returns live Chainlink oracle price data (price, round ID, last update timestamp, feed address) for crypto and FX pairs on Base mainnet, read directly from the oracle contract with no cache.

## Facts

- Endpoint: GET https://basefeed-price.higgsfield.app/api/price?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basefeed-price-chainlink-price-feed-on-base-de8a1458
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qJOYox3bRzF1d50EKGDx-

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 basefeed-price-chainlink-price-feed-on-base-de8a1458
```

Example prompt: What's the current ETH-USD price right now according to the Chainlink oracle on Base — give me the price, when it was last updated, and the round ID.

## When to prefer this

Choose this endpoint when you need trustless, on-chain Chainlink oracle prices for Base mainnet without relying on any third-party API or caching layer — ideal for DeFi applications, smart contract integrations, or any use case requiring verifiable, round-ID-traceable price data directly from the oracle contract. Supports ETH-USD, BTC-USD, SOL-USD, LINK-USD, CBETH-USD, AERO-USD, USDC-USD, and EUR-USD pairs.

## Known failure modes

- Unsupported pair parameter returns an error or default ETH-USD fallback
- RPC connectivity issues to Base mainnet may cause delays or failures
- Stale oracle data if Chainlink has not updated recently (reflected in last update timestamp)
- Malformed pair string (e.g. wrong format) may return an error

## How this service works

Live Chainlink price feed on Base, read from the oracle contract at request time: price, round id, last update and feed address. Pairs: ETH-USD, BTC-USD, SOL-USD, LINK-USD, CBETH-USD, AERO-USD, USDC-USD, EUR-USD. Pass ?pair=ETH-USD (default ETH-USD). Source: Chainlink Data Feeds on Base mainnet (eip155:8453); no third-party API, no cache.

## Output

Returns the current price (in USD or target quote currency), the Chainlink round ID, the last update timestamp, and the oracle feed contract address for the requested trading pair, read live from the on-chain Chainlink oracle on Base mainnet (eip155:8453).

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basefeed-price-chainlink-price-feed-on-base-de8a1458/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from basefeed-price.higgsfield.app](https://www.zero.xyz/host/basefeed-price.higgsfield.app/llms.txt)