# Robinhood Chain Cross-Venue Tokenized Stock Arbitrage Pricer

> Robinhood Chain Cross-Venue Tokenized Stock Arbitrage Pricer is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Scans all liquid Robinhood Chain pools/DEXes for a tokenized stock ticker and returns the highest price, lowest price, and spread percentage to surface arbitrage opportunities.

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/rh/arb
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/robinhood-chain-cross-venue-tokenized-stock-arbitrage-pricer-847a45ae
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I_E-1JDP15IR0p2GtPXSL

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 robinhood-chain-cross-venue-tokenized-stock-arbitrage-pricer-847a45ae -d '<json body>'
```

Example prompt: Check all the liquid Robinhood Chain pools for NVDA and tell me the high/low price spread — I want to see if there's a cross-venue arbitrage opportunity worth acting on, only including pools with at least $5000 in liquidity.

## When to prefer this

Use this endpoint when an agent needs to find cross-venue price discrepancies for a specific tokenized stock or ETF on Robinhood Chain DEXes. Prefer this over the premium/discount endpoint (which compares on-chain vs traditional market price) when the goal is purely intra-chain arbitrage across pools. Best suited for on-chain arb bots, DeFi trading agents, or portfolio tools that want to exploit or monitor DEX mispricing in real time.

## Known failure modes

- Ticker not found on Robinhood Chain — no tokenized asset exists for the given symbol
- All pools below minLiquidityUsd threshold — returns empty or no-venue result
- Network/RPC errors fetching on-chain pool data — 5xx response
- Invalid ticker format — validation error
- Insufficient liquidity across all venues to compute meaningful spread

## How this service works

Cross-venue arbitrage: prices a tokenized stock across every liquid Robinhood Chain pool/DEX and returns the high/low and spread %. Send { ticker, minLiquidityUsd? }. Spot mispricings between venues for on-chain arb agents.

## Output

Returns the highest and lowest prices found for the tokenized stock across all qualifying Robinhood Chain pools/DEXes, the spread percentage between them, and a breakdown by venue — enabling an agent to identify and quantify mispricing opportunities.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "ticker"
 ],
 "properties": {
  "ticker": {
   "type": "string",
   "description": "Stock/ETF ticker"
  },
  "minLiquidityUsd": {
   "type": "number",
   "description": "Ignore pools below this liquidity (default 3000)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/robinhood-chain-cross-venue-tokenized-stock-arbitrage-pricer-847a45ae/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)