# Oraclepost — Live Chainlink Price Feed

> Oraclepost — Live Chainlink Price Feed is a paid API for AI agents from oraclepost.higgsfield.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-19).

Returns the live Chainlink oracle price, round ID, last update timestamp, and feed address for a specified crypto or forex pair on Base mainnet.

## Facts

- Endpoint: GET https://oraclepost.higgsfield.app/api/price
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oraclepost-live-chainlink-price-feed-dfdeb1f2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vg1-sKxLq8IIW18fRzcXS

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 oraclepost-live-chainlink-price-feed-dfdeb1f2
```

Example prompt: What is the current live Chainlink oracle price for ETH-USD on Base right now, including the round ID and when it was last updated?

## When to prefer this

Choose this endpoint when you need a trustless, on-chain Chainlink oracle price with full provenance (round ID, timestamp, feed address) on Base mainnet, with no third-party API or caching layer in the path. Prefer it over off-chain price APIs when auditability, freshness guarantees, and on-chain verifiability are required.

## Known failure modes

- Unsupported pair symbol returns an error — only ETH-USD, BTC-USD, SOL-USD, LINK-USD, CBETH-USD, AERO-USD, USDC-USD, EUR-USD are valid
- RPC connectivity issues to Base mainnet may cause a 502 or timeout
- Missing x402 payment header or insufficient USDC balance results in a 402 Payment Required response
- Malformed pair query parameter may return a 400 Bad Request

## 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). No third-party API, no cache.

## Output

Returns a JSON object containing the current price, round ID, timestamp of the last oracle update, and the Chainlink feed contract address for the requested trading pair on Base mainnet. Data is read directly from the oracle contract with no caching.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "pair"
     ],
     "properties": {
      "pair": {
       "type": "string",
       "description": "Pair to quote, e.g. ETH-USD"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {}
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oraclepost-live-chainlink-price-feed-dfdeb1f2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oraclepost.higgsfield.app](https://www.zero.xyz/host/oraclepost.higgsfield.app/llms.txt)