# Synapse API — Robinhood RPC Endpoint

> Synapse API — Robinhood 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 2026-09-14).

Executes RPC-style method calls against Robinhood-related data or blockchain utilities via a JSON-RPC interface, paid per call via x402.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/robinhood/rpc
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-robinhood-rpc-endpoint-df53b800
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mcDPi1Iu4qDx7t76Gwjcg

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-robinhood-rpc-endpoint-df53b800 -d '<json body>'
```

Example prompt: Call the Robinhood RPC endpoint using method 'getAccountPortfolio' with no additional params and return what it gives back.

## When to prefer this

Use this endpoint when you need to invoke a specific named RPC method against Robinhood-related data or utilities and want a pay-per-call model via x402 with no subscription required. Prefer it over REST alternatives when your workflow is naturally method-driven and you know the exact RPC method name and parameters to pass.

## Known failure modes

- Invalid or unsupported method name returns an error response
- Malformed params array causes a parsing or execution error
- Payment not received via x402 results in a 402 Payment Required response
- Method exists but returns empty or null result if no data is available
- Network timeout or upstream unavailability returns a 5xx 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 a JSON-RPC style response containing the result of the specified method call, which may include financial data, trading information, account details, or blockchain-related data depending on the method invoked.

## 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-robinhood-rpc-endpoint-df53b800/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)