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fold · x402 — Onchain JSON-RPC Gateway
x402
fold · x402 — Onchain JSON-RPC Gateway is a paid API for AI agents from x402.fold.computer, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Executes read-only JSON-RPC calls (e.g. eth_getBalance) against EVM-compatible chains, returning machine-readable onchain data for agents, priced per call via x402.
Price / call$0.001
Success—
StatusDown
How this service works
Machine-readable market intelligence for onchain agents, served over x402.
Output
A JSON object with a 'status' field and a 'data' object containing the result of the JSON-RPC call, which may include fields like title, url, publishedDate, and highlights depending on the method called.
Example use cases
Example prompt
“Check the ETH balance of address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Base using eth_getBalance — I need the current onchain balance right now.”
Technical details
Endpoint
POSThttps://x402.fold.computer/rpcWhen to prefer
Use this endpoint when an AI agent needs to make read-only JSON-RPC calls against major EVM chains (Base, Ethereum, Arbitrum, Optimism, Polygon) and wants to pay per call via the x402 micropayment protocol. Prefer this over self-hosted RPC nodes when you want zero infrastructure setup and onchain micropayment billing.
Side effects
- Unsupported chain name → likely 400 or error status
- Invalid or non-read-only JSON-RPC method → error or rejected request
- Malformed params array → RPC execution error
- Payment failure (x402) → 402 response, call not executed
- Node unavailable for chain → upstream RPC timeout or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chainrequired | string | base, ethereum, arbitrum, optimism, polygon |
| methodrequired | string | read-only JSON-RPC method, e.g. eth_getBalance |
| params | array | JSON-RPC params |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| datarequired | object | results: title, url, publishedDate, highlights |
| statusrequired | string |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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