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Proofwork Base Token Price API
x402
Proofwork Base Token Price API is a paid API for AI agents from proofwork-the402-webhook.phase-voice.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns the current USD price and metadata for any ERC-20 token on Base Mainnet, with a GeckoTerminal evidence link.
Price / call$0.001
Success—
StatusUnknown
How this service works
Small non-cyber evidence and data APIs payable per request with x402 on Base.
Output
A JSON object containing the token's name, symbol, contract address, decimals, and current USD price, plus the network identifier ('Base Mainnet') and an array of evidence URLs pointing to the underlying GeckoTerminal data source used to derive the price.
Example use cases
DeFi portfolio valuation bot
“What's the current USD price of the token at address 0x4200000000000000000000000000000000000006 on Base? I need to calculate my portfolio value.”
Token price alert trigger
“Check the current USD price of the Base token at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know if it's moved significantly.”
On-chain trade research
“Before I make a swap, can you look up the current USD price and metadata for the Base token at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA?”
Technical details
Endpoint
GEThttps://proofwork-the402-webhook.phase-voice.workers.dev/v1/base-token-priceWhen to prefer
Choose this endpoint when you need a quick, verifiable USD price for any ERC-20 token on Base Mainnet and want an auditable evidence link to the underlying data source. It is particularly useful for AI agents operating in DeFi or on-chain finance contexts that need lightweight, per-request priced access without a subscription, and where transparent evidence provenance (GeckoTerminal URL) matters.
Side effects
- Invalid or non-Base token address format returns a validation error
- Token address not found on Base Mainnet may return empty or null price data
- GeckoTerminal upstream unavailability causes delayed or failed response
- Malformed 0x address (wrong length or non-hex characters) rejected by schema validation
- Newly deployed tokens with no liquidity may return zero or missing price
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"token": {
"name": "Wrapped Ether",
"symbol": "WETH",
"address": "0x4200000000000000000000000000000000000006",
"decimals": 18,
"price_usd": 1876.82
},
"report": "base_token_price",
"network": "Base Mainnet",
"evidence": [
"https://api.geckoterminal.com/api/v2/networks/base/tokens/0x4200000000000000000000000000000000000006"
]
}
}Tags
x402
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