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Joe Market Data – Token Fundamentals
x402
Joe Market Data – Token Fundamentals is a paid API for AI agents from joe-market-data.marnick-yezo.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Fetches fundamental market data for a crypto token (price, market cap, FDV, circulating supply, rank) via CoinGecko, billed at $0.001 USDC per call on Base.
Price / call$0.001
Success—
StatusUnknown
How this service works
Public-data market intel for AI agents: token prices (CoinGecko), DefiLlama TVL/fees/stables, Polymarket odds. Otto-compatible path names. $0.001 USDC per call on Base. No LLM/TTS/image.
Output
Returns a JSON object containing the token's current price (USD), market cap, fully diluted valuation (FDV), circulating supply, CoinGecko rank, and the ticker symbol, along with metadata indicating the data source (CoinGecko), the endpoint used, and the cost per call ($0.001 USDC).
Example use cases
Real-time token price check
“What's the current price and market cap of SOL right now?”
Portfolio valuation snapshot
“Pull the price, circulating supply, and fully diluted valuation for BTC so I can update my portfolio tracker.”
Token research for investment decision
“I'm researching ETH — can you get me its CoinGecko rank, FDV, and circulating supply so I can compare it against other Layer 1s?”
Technical details
Endpoint
GEThttps://joe-market-data.marnick-yezo.workers.dev/token-fundamentalsWhen to prefer
Choose this endpoint when you need lightweight, low-cost ($0.001 USDC) token fundamental data — price, market cap, FDV, supply, and rank — sourced from CoinGecko for a single ticker. Prefer it over heavier analytics platforms when you only need quick token-level snapshots without on-chain computation or historical data. It is especially suitable for AI agents needing to embed real-time crypto fundamentals into reasoning or reports without building a CoinGecko integration themselves.
Side effects
- Unknown or misspelled token symbol returns an error or empty data
- CoinGecko API downtime causes upstream failure
- Rate limiting on the underlying CoinGecko API may result in delayed or failed responses
- Missing required 'symbol' query parameter causes a 400-level error
- Very new or low-liquidity tokens may not be indexed on CoinGecko and return no data
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"fdv": 300000000000,
"rank": 2,
"price": 2500,
"supply": {
"circulating": 120000000
},
"symbol": "ETH",
"market_cap": 300000000000
},
"meta": {
"source": "coingecko",
"endpoint": "/token-fundamentals",
"cost_usdc": "0.001"
},
"status": "success"
}
}Tags
x402
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