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Synapse API — ZKsync RPC Endpoint
x402
Synapse API — ZKsync RPC Endpoint is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).
Proxies JSON-RPC calls to the ZKsync Era blockchain network, enabling on-chain reads and writes via standard Ethereum-compatible methods.
Price / call$0.01
Success—
StatusUnknown
How this service works
High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.
Output
A standard JSON-RPC response object containing the 'result' field with on-chain data (balance, block info, tx hash, etc.) or an 'error' object with code and message if the call fails.
Example use cases
Check wallet balance on ZKsync
“What's the ETH balance of address 0xDEAD...BEEF on ZKsync Era right now?”
Broadcast signed transaction to ZKsync
“Submit this signed transaction to ZKsync Era: 0xf86c...signed-hex — and give me back the transaction hash.”
Read smart contract state on ZKsync
“Call the totalSupply function on the ERC-20 contract at 0x1234...abcd on ZKsync Era and return the value.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/zksync/rpc?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-per-call ZKsync Era RPC access without managing your own node or committing to a subscription plan. Ideal for agents that interact with ZKsync infrequently or want metered on-chain access billed in USDC via x402.
Side effects
- Invalid RPC method name returns JSON-RPC error code -32601 (method not found)
- Malformed params array returns error code -32602 (invalid params)
- Network congestion or ZKsync node downtime returns a 503 or timeout
- Submitting an invalid or already-mined transaction returns execution revert error
- Payment failure (x402) blocks the request before it reaches the RPC layer
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| method | string | |
| params | array |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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