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QuantaFlow x402 API Gateway — Alchemy StarkNet Mainnet
x402
QuantaFlow x402 API Gateway — Alchemy StarkNet Mainnet is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).
Proxies requests to the Alchemy StarkNet Mainnet RPC/API through an x402 micropayment-gated gateway, 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 StarkNet Mainnet API is passed through directly after successful x402 micropayment verification — including JSON-encoded blockchain data such as block info, transaction receipts, contract call results, or RPC method responses, along with the original content type.
Example use cases
StarkNet smart contract state read
“Query the StarkNet mainnet contract at address 0x04... to get the current token balance for my wallet — use the Alchemy StarkNet endpoint.”
Fetch StarkNet transaction receipt
“Get me the transaction receipt for StarkNet mainnet tx hash 0xabc123... so I can confirm it was accepted on-chain.”
StarkNet DeFi protocol data fetch
“Pull the current liquidity pool reserves from the StarkNet mainnet DEX contract at 0x05... via Alchemy so I can calculate the current swap rate.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/alchemy-starknet-mainnet?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-per-call access to Alchemy's StarkNet Mainnet RPC without a subscription API key, using x402 USDC micropayments. Ideal for agents that need occasional or low-volume StarkNet data queries (block data, contract calls, transaction lookups) and want to pay only for what they use at $0.01 per call rather than maintaining an Alchemy account.
Side effects
- Payment failure: insufficient USDC balance or x402 payment not accepted — gateway returns 402 Payment Required
- Invalid path: upstream Alchemy endpoint not found for the specified path — returns 404 or upstream error
- Malformed JSON body: invalid JSON in the body field causes upstream rejection
- RPC method error: StarkNet RPC returns an error (e.g. contract not found, invalid block number) passed through from Alchemy
- Rate limiting: Alchemy upstream rate limit exceeded — returns 429 or upstream throttle response
- Network timeout: StarkNet mainnet node unresponsive — gateway may return 504 or timeout error
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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