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Grey Ridge Signals — Crypto Price Feed (Base Chain, x402)
x402
Grey Ridge Signals — Crypto Price Feed (Base Chain, x402) 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 real-time spot prices for major crypto assets (BTC, ETH, SOL, LINK, etc.) on Base chain, settled inline via x402 micropayment at $0.005 USDC per call.
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
A JSON object containing the chain name ('base') and a prices map keyed by asset symbol (e.g. BTC, ETH, SOL, LINK) with their current USD spot prices as floats. Example: {chain: 'base', prices: {BTC: 100000.5, ETH: 3500.1, SOL: 104.2, LINK: 12.5}}.
Example use cases
Live price check for trading bot
“Pull the current spot prices for ETH and BTC on Base so my agent can decide whether to execute a trade right now.”
DeFi portfolio valuation
“Fetch today's live prices for SOL, ETH, and LINK on Base so I can calculate the current USD value of my DeFi portfolio.”
Price alert baseline
“Get me the current price of ETH on Base chain — I want to set a baseline so my agent can alert me if it drops more than 5%.”
Technical details
Endpoint
GEThttps://x402-data-api.sigrunner.workers.dev/chain/prices?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your agent needs real-time crypto spot prices on Base chain with zero account setup or API key — ideal for autonomous trading bots, DeFi agents, or portfolio tools that can settle micropayments inline via x402. Prefer over free-tier APIs when you need guaranteed pay-per-call access without rate-limit concerns or key management overhead.
Side effects
- Payment not received or x402 handshake fails — endpoint returns 402 Payment Required
- Invalid or unsupported asset symbol — may return empty price entry or error
- Network/worker timeout — Cloudflare worker may return 503 under load
- Stale price data if upstream oracle is lagging — no explicit freshness guarantee in schema
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"chain": "base",
"prices": {
"BTC": 100000.5,
"ETH": 3500.1,
"SOL": 104.2,
"LINK": 12.5
}
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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