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QuantaFlow x402 API Gateway — Alchemy Celo Sepolia
x402
QuantaFlow x402 API Gateway — Alchemy Celo 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 2026-10-14).
Proxies requests to the Alchemy Celo Sepolia blockchain RPC/API endpoint 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 response body from Alchemy's Celo Sepolia RPC endpoint is passed through transparently after the $0.01 USDC x402 micropayment is processed. This typically includes standard JSON-RPC result objects containing blockchain data such as block details, transaction receipts, account balances, or contract call return values.
Example use cases
Check Celo Sepolia wallet balance
“Look up the CELO token balance for wallet address 0xAbC123... on the Celo Sepolia testnet using the Alchemy gateway — call eth_getBalance at the latest block.”
Fetch latest Celo Sepolia block
“Get me the most recent block details from Celo Sepolia testnet through the Alchemy proxy — I need the block hash, number, and timestamp.”
Broadcast test transaction on Celo Sepolia
“I want to send a raw signed transaction to the Celo Sepolia testnet using the Alchemy endpoint — can you relay it via eth_sendRawTransaction with this hex payload: 0xf86c...?”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/alchemy-celo-sepolia?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-per-call access to the Alchemy Celo Sepolia RPC without managing an Alchemy API key subscription, and when your agent already supports x402 micropayment headers. Ideal for low-volume testnet interactions where a subscription is overkill, or for agents operating in web3/DeFi contexts that natively handle USDC micropayments on-chain.
Side effects
- Insufficient USDC balance for x402 payment — returns 402 Payment Required
- Invalid or malformed JSON-RPC body — upstream Alchemy error forwarded
- Unsupported RPC method for Celo Sepolia — upstream 400/error response
- Path routing mismatch — incorrect path parameter results in 404 or upstream error
- Alchemy upstream outage — 502/503 passed through
- x402 facilitator unavailable — payment cannot be settled
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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Zero review prompt (fires after every successful call)
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