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QuantaFlow CoinCap Proxy - x402 API Gateway
x402
QuantaFlow CoinCap Proxy - x402 API Gateway is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Proxies requests to the CoinCap cryptocurrency data API via the x402 micropayment protocol, charging $0.01 USDC per call
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 CoinCap API response, passed through as-is after successful x402 micropayment — typically JSON containing cryptocurrency asset data such as price in USD, market cap, volume, supply, and percent change fields.
Example use cases
Real-time crypto portfolio valuation
“Get me the current prices for Bitcoin, Ethereum, and Solana from CoinCap so I can update my portfolio's total value.”
DeFi arbitrage price monitoring
“Fetch the latest price and volume data for the top 10 cryptocurrencies by market cap from CoinCap — I need to check for arbitrage opportunities.”
Crypto market research snapshot
“Pull the full asset details for Chainlink from CoinCap, including its current price, market cap rank, and 24-hour percent change.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/coincap?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need real-time or historical cryptocurrency market data from CoinCap and are operating in a web3/DeFi agent context where paying per-call via x402 USDC micropayments is acceptable. Prefer this over direct CoinCap API access when you want a pay-as-you-go model without managing API keys, or when building autonomous agents that need programmable crypto payments.
Side effects
- Payment failure: insufficient USDC balance or x402 payment header rejected — returns 402 Payment Required
- Invalid path: unrecognized CoinCap API path returns 404 or upstream error
- Malformed query parameters: upstream CoinCap returns 400 bad request
- CoinCap upstream outage: gateway may return 502 or 503
- Rate limiting from upstream CoinCap API: may return 429
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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