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QuantaFlow x402 API Gateway – Alchemy Sei Mainnet
x402
QuantaFlow x402 API Gateway – Alchemy Sei 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 2026-10-20).
Proxies paid API requests to the Alchemy Sei Mainnet RPC/API endpoint using the x402 micropayment protocol at $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 the Alchemy Sei Mainnet API, passed through as-is, including the response body and content type. This may include JSON-RPC results, account data, block information, transaction receipts, or other blockchain query outputs depending on the path and method called.
Example use cases
Fetch Sei wallet token balances
“What are the current token balances for wallet address 0x4F9a1bCdEf23456789abcdef1234567890ABCDEF on Sei mainnet? Use the Alchemy Sei mainnet gateway.”
Query latest block number on Sei
“Get the latest block number on the Sei mainnet blockchain right now via the Alchemy Sei RPC endpoint.”
Retrieve smart contract data on Sei
“Call the eth_call method on Sei mainnet against contract 0xDEADBEEF0000000000000000000000000000dead with calldata 0x70a08231 and return the result.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/alchemy-sei-mainnet?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-per-use access to Alchemy's Sei Mainnet RPC without committing to a subscription, and your agent already supports the x402 micropayment protocol. Ideal for low-frequency or bursty blockchain queries on Sei where a flat monthly API plan would be wasteful.
Side effects
- Payment failure: x402 payment header missing or insufficient USDC balance results in HTTP 402
- Invalid path: unrecognized Alchemy API path returns upstream 404 or error
- Malformed body: invalid JSON in body field causes upstream parse error
- Network timeout: Sei mainnet RPC node unavailable returns timeout error
- Rate limiting: excessive requests may trigger upstream Alchemy rate limits
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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