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QuantaFlow x402 API Gateway – CoinMarketCap
x402
QuantaFlow x402 API Gateway – CoinMarketCap is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-09).
Proxies requests to CoinMarketCap's API through a pay-per-call x402 micropayment gateway for cryptocurrency market data
Price / call$0.01
Success—
StatusUnknown
How this service works
Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.
Output
The raw upstream CoinMarketCap API response body is passed through, including cryptocurrency quotes, metadata, market rankings, or any other CoinMarketCap endpoint data, along with the content type header from the upstream service.
Example use cases
Live crypto price lookup for trading bot
“Fetch the latest price and 24-hour volume for Bitcoin and Ethereum from CoinMarketCap so I can decide whether to rebalance my portfolio.”
Token metadata for DeFi dashboard
“Pull the CoinMarketCap listing data for Chainlink including its circulating supply, market cap rank, and contract address — use the /v2/cryptocurrency/info endpoint with the symbol LINK.”
Top gainers report for newsletter
“Query CoinMarketCap for the top 20 cryptocurrencies sorted by 24-hour percent change so I can put together today's market movers report.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/coinmarketcap?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need CoinMarketCap market data without managing a CoinMarketCap API key subscription, preferring a pay-per-call micropayment model via x402 protocol instead. Ideal for AI agents in web3/DeFi contexts that already use USDC micropayments and want to avoid monthly API subscription overhead.
Side effects
- Payment failure if USDC balance is insufficient or x402 payment header is malformed
- Upstream CoinMarketCap API errors (rate limits, invalid API key, unknown symbol) passed through as-is
- Invalid path parameter resulting in 404 from upstream
- Malformed query object causing upstream 400 error
- Gateway timeout if CoinMarketCap is slow to respond
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| body | string | Optional JSON body forwarded to POST requests. |
| path | string | Path below the selected upstream origin. |
| query | object | |
| method | string |
Output
Schema · Response
{
"description": "The upstream response body and content type are passed through after successful payment."
}Tags
x402
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