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QuantaFlow x402 API Gateway – Infura Polygon Mainnet
x402
QuantaFlow x402 API Gateway – Infura Polygon 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 2026-10-10).
Proxies JSON-RPC and REST requests to Infura's Polygon Mainnet node via a pay-per-call x402 micropayment gateway at $0.01 USDC per request
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 Infura's Polygon Mainnet node is passed through directly — typically a JSON-RPC result object containing blockchain data such as block numbers, balances, transaction receipts, or contract return values, along with the appropriate content-type header.
Example use cases
Check Polygon wallet balance
“Look up the MATIC balance for wallet address 0xAbCd...1234 on Polygon mainnet using the Infura node — send an eth_getBalance call for the latest block.”
Fetch smart contract state
“Call the balanceOf method on the USDC contract at 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174 on Polygon mainnet for address 0xDeAd...BeeF so I can see how many USDC tokens they hold.”
Retrieve Polygon transaction receipt
“Get the transaction receipt for tx hash 0xabc123...def456 on Polygon mainnet — I need to know if it confirmed and what gas was used.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/infura-polygon-mainnet?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need permissionless, pay-per-call access to Polygon Mainnet blockchain data via Infura without managing an Infura API key subscription. Ideal for low-volume or sporadic Polygon RPC queries where a monthly subscription is overkill, or for autonomous agents that need to self-fund blockchain queries using USDC micropayments via the x402 protocol.
Side effects
- Payment failure: insufficient USDC balance causes 402 Payment Required before the upstream call is made
- Invalid JSON-RPC method or malformed body returns upstream Infura error (e.g. -32601 method not found)
- Incorrect path routing results in a 404 from the gateway
- Rate limiting or Infura quota exhaustion returns a 429 or upstream 503
- Network timeout from Infura returns a 504 or empty 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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