# Robinhood Chain Perpetual Open Interest by Ticker

> Robinhood Chain Perpetual Open Interest by Ticker is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns real-time perpetual futures open interest data for a given stock/ETF ticker on Robinhood Chain

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/rh/perp-oi
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/robinhood-chain-perpetual-open-interest-by-ticker-5d674106
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NduUsbQ765cs3Cy2yfgtg

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-perpetual-open-interest-by-ticker-5d674106 -d '<json body>'
```

Example prompt: What's the current perpetual futures open interest for TSLA on Robinhood Chain? I want to see how much aggregate exposure traders have built up in that ticker.

## When to prefer this

Choose this endpoint when you need real-time open interest data specifically for tokenized stock or ETF perpetual futures on Robinhood Chain. It is distinct from crypto-native perp OI endpoints and is the right choice when analyzing equity-linked derivatives, monitoring speculative positioning in tokenized stocks, or comparing perp OI against underlying equity metrics like dislocation or earnings catalysts.

## Known failure modes

- Invalid or unsupported ticker symbol returns an error
- Ticker not listed as a tokenized asset on Robinhood Chain returns no data
- Payment of $0.05 USDC not settled causes 402 Payment Required response
- Network or upstream oracle latency causes delayed or stale data
- Rate limiting if payment layer has issues processing concurrent calls

## How this service works

Robinhood Chain tokenized-stock perp open interest & stats on Lighter: open interest (base + USD notional), mark/index/last price, 24h volume, price change, and daily high/low/trades. Send { ticker }. Positioning and liquidity depth for tokenized-equity perp traders.

## Output

Returns real-time perpetual futures open interest figures for the requested stock or ETF ticker on Robinhood Chain, enabling agents to assess aggregate market positioning, speculative exposure, and potential trading signals in tokenized equity derivatives.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/robinhood-chain-perpetual-open-interest-by-ticker-5d674106/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)