# Synapse API — Celo RPC Endpoint

> Synapse API — Celo 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 2026-10-24).

Proxies JSON-RPC calls to the Celo blockchain network, enabling reads and writes via standard Ethereum-compatible RPC methods.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/celo/rpc?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-celo-rpc-endpoint-f1486c4a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lg923JFOrq5d49tNh384r

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-celo-rpc-endpoint-f1486c4a -d '<json body>'
```

Example prompt: Can you check the current CELO balance of wallet address 0xAbC123... on the Celo network using eth_getBalance?

## When to prefer this

Choose this endpoint when you need pay-per-call Celo RPC access without managing your own node or committing to a subscription. It's ideal for infrequent or agent-driven Celo blockchain interactions billed in USDC via x402, covering all standard eth_* and net_* JSON-RPC methods on the Celo network.

## Known failure modes

- Invalid JSON-RPC method name returns error code -32601
- Malformed params array causes parse error -32602
- Payment failure (402) blocks request if USDC not available
- Network congestion or Celo node downtime causes timeout
- Submitting to wrong network (e.g. Ethereum mainnet method quirks) returns unexpected results

## 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 a standard JSON-RPC response object containing the result field (block data, balance in wei, transaction hash, contract return value, etc.) or an error object with code and message 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-celo-rpc-endpoint-f1486c4a/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)