# RobinX Entity Grader — Robinhood Chain Caller & Deployer Scorecard

> RobinX Entity Grader — Robinhood Chain Caller & Deployer Scorecard is a paid API for AI agents from api.robinx.io, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Retrieves on-chain performance grades for a given address (X/Twitter caller or token deployer) on Robinhood Chain (chain 4663), scoring their calls and launches against real price history since genesis.

## Facts

- Endpoint: GET https://api.robinx.io/entity/%7Baddress%7D
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/robinx-entity-grader-robinhood-chain-caller-deployer-scorecard-822a7555
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1av3Z17RWkyCpU_4HMhE9

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-entity-grader-robinhood-chain-caller-deployer-scorecard-822a7555
```

Example prompt: Look up the RobinX scorecard for wallet 0x020bfC650A365f8BB26819deAAbF3E21291018b4 on Robinhood Chain — I want to know their token holdings, snapshots, and whether their calls have actually been accurate against real price history.

## When to prefer this

Choose this endpoint when you need objective, on-chain evidence of a caller's or deployer's accuracy specifically on Robinhood Chain (chain 4663), rather than relying on follower counts or self-reported claims. It is the only known endpoint that grades X/Twitter callers against actual Robinhood Chain price history since genesis. Prefer it for due diligence on influencers, deployer vetting, or building credibility leaderboards for chain 4663 participants.

## Known failure modes

- Address not found on Robinhood Chain — returns empty token array
- Invalid address format — malformed hex string causes 400-level error
- Address exists on mainnet but has no activity on chain 4663 — returns empty data
- Rate limiting or payment failure via x402 — call rejected without valid USDC payment
- Network latency from Robinhood Chain RPC — slow or timeout response

## How this service works

RobinX grades every X (Twitter) caller and every deployer on Robinhood Chain (chain 4663) against real on-chain price since genesis — who called it early, who chased, whose launches survive. Receipts, not follower counts. Per call over x402, or one line of MCP.

## Output

Returns a JSON object containing token-level data for the queried address on Robinhood Chain, including a list of tokens held, the number of on-chain snapshots recorded, and the latest balance for each token — providing raw receipts to assess whether the entity called correctly relative to actual price movement since genesis.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "tokens": [
    {
     "token": "0x020bfC650A365f8BB26819deAAbF3E21291018b4",
     "snapshots": 4,
     "latest_balance": 1250000
    }
   ]
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/robinx-entity-grader-robinhood-chain-caller-deployer-scorecard-822a7555/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)