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Grey Ridge Signals — Chainlink USD Price Feed (Base)
x402
Grey Ridge Signals — Chainlink USD Price Feed (Base) is a paid API for AI agents from x402-data-api.sigrunner.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Returns the current USD price of a token on Base mainnet via Chainlink price feed data, used as part of a pre-trade token-safety gate for Base trading agents.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call market & on-chain data for Base trading agents over x402: live DeFi yields, cross-venue funding rates, token prices, Polymarket and RPC data — plus a pre-trade token-safety gate (GO/HOLD/BLOCK). No account, no API key; agents pay inline in USDC from $0.001/call.
Output
Returns a JSON object containing the chain name (e.g. 'base') and the current USD price of the queried token as reported by Chainlink's on-chain price feed (e.g. {"chain":"base","price_usd":12.5}). The response provides a real-time oracle price suitable for pre-trade validation and position sizing in DeFi trading agents.
Example use cases
Pre-trade price validation for DeFi bot
“I'm about to swap some tokens on Base — can you fetch the current Chainlink USD price for this ERC-20 address so my trading agent can confirm the price looks reasonable before executing?”
Token valuation in portfolio tracker
“I want to know the current USD value of a Base mainnet token I hold — pull the live Chainlink price feed data for it so I can calculate my position size.”
On-chain price sanity check before approval
“Before I approve this DeFi transaction on Base, grab the Chainlink USD price for the token involved so I can verify the price isn't manipulated or wildly off-market.”
Technical details
Endpoint
GEThttps://x402-data-api.sigrunner.workers.dev/chain/link-usd?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, trustless, on-chain USD price for a Base ERC-20 token with no API key or account setup required, billed inline via x402 micropayments. It is particularly well-suited for AI trading agents that need Chainlink oracle prices as part of a broader pre-trade safety workflow on Base mainnet. Prefer it over centralized price APIs when on-chain data provenance matters.
Side effects
- No Chainlink feed available for the requested token — returns an error or null price
- Invalid or unsupported token address — endpoint may return an error response
- Payment not settled via x402 — request blocked with 402 Payment Required
- Network latency or Cloudflare Workers timeout causing delayed or failed response
- Token address on wrong chain — data returned may be incorrect or missing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"price_usd": 12.5
}
}Tags
x402
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