# Synapse API — SUI Blockchain RPC Proxy

> Synapse API — SUI Blockchain RPC Proxy 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 2026-09-15).

Proxies JSON-RPC method calls to the SUI blockchain network, enabling agents to query on-chain state, submit transactions, and interact with SUI smart contracts.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/sui/rpc
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-sui-blockchain-rpc-proxy-84cb4cd1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xg4Z9HPOly5DRF98vewCT

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synapse-api-sui-blockchain-rpc-proxy-84cb4cd1 -d '<json body>'
```

Example prompt: Call the SUI RPC method sui_getBalance with owner address 0xabc123... and coin type 0x2::sui::SUI to get the current SUI balance for that wallet.

## When to prefer this

Use this endpoint when you need to interact with the SUI blockchain specifically and want pay-per-call pricing via x402 USDC without managing your own SUI node or RPC subscription. Prefer it over self-hosted nodes when minimizing infrastructure overhead and when operating in an autonomous agent context that already handles x402 payments.

## Known failure modes

- Invalid RPC method name returns JSON-RPC error code -32601
- Malformed params array causes parse error -32700
- Non-existent SUI object ID returns null result
- Payment failure (402) if x402 USDC payment is not included
- Rate limiting or node unavailability returns 5xx error
- Submitting an already-finalized transaction returns duplicate transaction error

## 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

Returns the standard JSON-RPC response body from the SUI node, including a result field with the requested on-chain data (balance, object details, transaction receipt, etc.) or an error object if the call fails.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string"
  },
  "params": {
   "type": "array",
   "items": {}
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-sui-blockchain-rpc-proxy-84cb4cd1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)