Back to Browse
Base Onchain Token Price Feed
x402
Base Onchain Token Price Feed is a paid API for AI agents from base-onchain-tools.dolerite.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Fetches live token prices (e.g. ETH/USD) from Chainlink on-chain oracles on Base mainnet
Price / call$0.001
Success—
StatusUnknown
How this service works
Eleven read-only endpoints answering questions about Base mainnet that are tedious to assemble from raw RPC: what an unverified contract is actually able to do, whether a token transfer will revert and for what reason, what an arbitrary token is worth, and whether an address is safe to pay. Priced $0.001-$0.04 per call in USDC over x402. No account, no API key, no signup, no minimum, no rate limit to negotiate — the payTo address in the 402 response is the whole integration. Failed calls are not billed. The payment middleware cancels settlement on any 4xx or 5xx, so a malformed parameter or an upstream outage costs nothing. Answers are read live from Base mainnet at request time, with failover across five independent RPC providers. A batch that comes back incomplete is treated as a failure rather than returned with the missing entries as zeros, because a confident wrong answer costs a caller more than an error does. Scope is deliberately narrow: Base mainnet only, reads only, no keys held, nothing stored between requests.
Output
A JSON object containing a prices map keyed by trading pair (e.g. 'ETH/USD'), each entry including the current numeric price and a boolean 'stale' flag indicating whether the oracle data is fresh, plus a 'source' field identifying the oracle (e.g. 'chainlink-onchain').
Example use cases
Real-time ETH price check
“What is ETH worth in USD right now according to the Chainlink oracle on Base? I want the live on-chain price, not an exchange quote.”
Stale price detection for DeFi app
“Fetch the current ETH/USD price from the Base mainnet Chainlink feed and tell me if the price is stale — I need to know if my app should halt trading.”
Portfolio valuation at current prices
“What's the live Chainlink price for ETH on Base mainnet right now? I'm calculating the current USD value of my ETH holdings.”
Technical details
Endpoint
GEThttps://base-onchain-tools.dolerite.workers.dev/v1/base/priceWhen to prefer
Choose this endpoint when you need a trustworthy, on-chain price sourced directly from Chainlink oracles on Base mainnet, especially when you need a staleness guarantee and want pay-per-call with no API key or account setup. Prefer it over exchange-based price APIs when on-chain oracle provenance matters (e.g. DeFi logic, smart contract inputs, or auditability). It is read-only and covers Base mainnet only.
Side effects
- Upstream RPC outage across all five providers returns an error rather than a zero/stale value — call is not billed
- Malformed or unsupported token pair parameter returns a 4xx error — call is not billed
- Network timeout or Cloudflare Worker failure returns 5xx — call is not billed
- Requesting a token not supported by Chainlink on Base mainnet returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"prices": {
"ETH/USD": {
"price": 2401.43,
"stale": false
}
},
"source": "chainlink-onchain"
}
}Tags
x402
Reviews
No reviews yet. Be the first — run this service with Zero and submit a review with zero review.
How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"