# RobinX Caller Leaderboard — Robinhood Chain

> RobinX Caller Leaderboard — Robinhood Chain is a paid API for AI agents from api.robinx.io, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns a ranked list of X (Twitter) callers graded by their on-chain prediction accuracy for tokens on Robinhood Chain (chain 4663), including early-call rate, median 1-hour performance, and coordination flags.

## Facts

- Endpoint: GET https://api.robinx.io/callers
- 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/robinx-caller-leaderboard-robinhood-chain-03e47b90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pp6i2Y8_ss_WYD6EKYz5t

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 robinx-caller-leaderboard-robinhood-chain-03e47b90
```

Example prompt: Can you pull up the RobinX caller leaderboard for Robinhood Chain and show me who has the highest early-call rate and how many calls they've made?

## When to prefer this

Use this endpoint when you need objective, on-chain-verified rankings of X/Twitter callers for Robinhood Chain tokens — not self-reported claims or follower counts. Prefer this over generic social sentiment tools when you specifically want to audit whether a caller was early or late relative to actual price action on chain 4663, or to detect coordinated shilling.

## Known failure modes

- No callers found if Robinhood Chain genesis data is unavailable
- Empty results if no X accounts have been graded yet
- Payment failure if x402 USDC transaction is not completed
- Malformed response if the chain 4663 indexer is lagging
- Rate limiting or 402 error if payment header is missing or invalid

## How this service works

Proven X caller-lift leaderboard

## Output

Returns a JSON array of caller objects, each containing the X account handle, total number of calls made, median 1-hour price return after calls, early-call rate (fraction of calls made before price movement), and a boolean coordination flag indicating potential shill behavior.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "data": {
  "callers": [
   {
    "calls": 5,
    "med_1h": 0.17,
    "account": "example_caller",
    "early_rate": 0.8,
    "coordinated": false
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/robinx-caller-leaderboard-robinhood-chain-03e47b90/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.robinx.io](https://www.zero.xyz/host/api.robinx.io/llms.txt)