# SperaxOS Chainlink Price Feed

> SperaxOS Chainlink Price Feed is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-30).

Fetches the current on-chain Chainlink oracle price for a given asset pair on a specified EVM chain

## Facts

- Endpoint: POST https://chat.sperax.io/api/x402/tools/chainlink/getPrice?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speraxos-chainlink-price-feed-607f0adf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zflyMZIP9W0BRCtRtHg3o

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 speraxos-chainlink-price-feed-607f0adf -d '<json body>'
```

Example prompt: What's the current Chainlink oracle price for ETH/USD on Arbitrum?

## When to prefer this

Use this endpoint when you need a trustless, on-chain Chainlink oracle price for a major crypto asset pair without managing API keys or subscriptions. Ideal for DeFi agents, trading bots, or any application requiring a decentralized price source that is not dependent on a centralized exchange API. Prefer this over CEX REST APIs when tamper-resistance and on-chain verifiability matter.

## Known failure modes

- Unsupported pair — Chainlink feed does not exist for the requested pair on the given chain
- Unsupported chain — chain name not in the allowed set (ethereum, arbitrum, base, bsc, polygon, optimism)
- Payment failure — x402 USDC payment not processed, request rejected
- RPC/oracle unavailability — on-chain feed temporarily unreachable
- Malformed pair string — pair not parseable (e.g. missing slash, invalid ticker)

## How this service works

AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.

## Output

Returns the current Chainlink oracle price for the requested asset pair on the specified EVM chain, sourced directly from the on-chain price feed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "pair": {
   "type": "string",
   "description": "Pair to read, e.g. \"ETH/USD\", \"BTC-USD\", or a bare \"ETH\" (USD is assumed)."
  },
  "chain": {
   "type": "string",
   "description": "Chain to read from: ethereum, arbitrum, base, bsc, polygon or optimism. Defaults to ethereum."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speraxos-chainlink-price-feed-607f0adf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.sperax.io](https://www.zero.xyz/host/chat.sperax.io/llms.txt)