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QuantaFlow x402 API Gateway — Alchemy Ethereum Sepolia
x402
QuantaFlow x402 API Gateway — Alchemy Ethereum Sepolia is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Proxies requests to Alchemy's Ethereum Sepolia testnet RPC/API endpoint via x402 micropayment-gated passthrough, 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 response from Alchemy's Ethereum Sepolia API is passed through directly — typically a JSON-RPC response object containing the requested blockchain data (block info, transaction details, account balances, etc.) along with the appropriate content-type header. No transformation is applied.
Example use cases
Check Sepolia wallet ETH balance
“Look up the ETH balance for wallet address 0xAbC123... on the Ethereum Sepolia testnet right now.”
Fetch Sepolia transaction receipt
“Get the transaction receipt for tx hash 0xDef456... on Sepolia testnet so I can confirm it was mined.”
Retrieve latest Sepolia block details
“Pull the full details of the most recent block on the Ethereum Sepolia testnet, including all transactions.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/alchemy-eth-sepoliaWhen to prefer
Choose this endpoint when you need pay-per-call, keyless access to Alchemy's Ethereum Sepolia testnet RPC without managing an Alchemy account or API key — ideal for AI agents that need to make occasional blockchain queries on the Sepolia testnet and want to pay via x402 USDC micropayments rather than maintain API key credentials.
Side effects
- Payment failure: insufficient USDC balance or invalid x402 payment header returns 402 Payment Required
- Invalid path: unrecognized Alchemy API path returns upstream 404 or error
- Malformed JSON body: invalid JSON in body field causes upstream RPC error
- Alchemy upstream outage: returns 502 or 503 if Alchemy Sepolia node is unavailable
- Unsupported RPC method: Alchemy may reject unsupported or disabled JSON-RPC methods with an error response
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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