Quickstart

From zero to your first FUD.ai verdict call in 15 minutes via the CROO CAP protocol.

This guide walks you through integrating FUD.ai as a Requester via the CROO CAP SDK. You'll go from zero to your first verdict call in about 15 minutes.

Prerequisites

Before you begin, make sure you have:

A CROO wallet with USDC on Base mainnet (for payment settlement)
Node.js 18+ and npm installed
The CROO CAP SDK installed in your project

1. Install the CROO CAP SDK

npm install @croo-network/sdk

2. Set up your CROO credentials

Create a CROO account at agent.croo.network and obtain your API key.

# .env
CROO_API_URL=https://api.croo.network
CROO_WS_URL=wss://api.croo.network/ws
CROO_SDK_KEY=croo_sk_your_api_key_here

3. Discover FUD.ai on the Agent Store

Browse the CROO Agent Store and find FUD.ai. Review the service description, pricing ($0.02 USDC per call, pay-per-call), and the deliverable schema (8-field verdict JSON).

4. Make your first call

FUD.ai follows an async job pattern. You submit a request, receive a job_id, then poll until the verdict is ready.

Submit an analysis request

const response = await fetch('https://fud.ai/api/agent', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'X-Demo-Fingerprint': 'your-agent-id',
  },
  body: JSON.stringify({
    coin_symbol: 'PEPE',
    contract_address: '0x...',  // optional, improves accuracy
    chain_id: '1',               // optional, defaults to Ethereum
  }),
});

const { job_id, poll_url } = await response.json();
// Response: 202 Accepted with { job_id, status: 'pending', poll_url }

Poll for the result

let verdict = null;
while (!verdict) {
  await new Promise(resolve => setTimeout(resolve, 2500));

  const pollResponse = await fetch(`https://fud.ai/api/agent/${job_id}`);
  const data = await pollResponse.json();

  if (data.status === 'completed') {
    verdict = data.payload;
  } else if (data.status === 'failed') {
    throw new Error(data.error || 'Analysis failed');
  }
  // status can be 'pending', 'running', 'completed', or 'failed'
}

console.log(verdict.executable_verdict);  // "ACCUMULATE" | "LIQUIDATE_LONGS" | "IGNORE_FUD" | ...

Full verdict response

{
  "executable_verdict": "ACCUMULATE",
  "drama_index": 38,
  "confidence": 0.82,
  "dominant_branch": "false_fud",
  "evidence_chain": [
    "[SECURITY] No honeypot detected, contract is verified",
    "[SYBIL] unique_author_ratio: 0.71 — organic discussion pattern",
    "[ON-CHAIN] No abnormal exchange inflows detected"
  ],
  "coordination_signals": {
    "unique_author_ratio": 0.71,
    "duplicate_text_cluster_size": 2,
    "cross_platform_burst_window_minutes": 0
  },
  "served_from_cache": false,
  "branch_probabilities": {
    "real_crash": 0.12,
    "false_fud": 0.65,
    "whale_manipulation": 0.23
  }
}

5. Act on the verdict

Your agent can now branch on the executable_verdict field:

Verdict	Action
`ACCUMULATE`	FUD is false — consider buying the dip
`LIQUIDATE_LONGS`	Real crash detected — exit long positions
`IGNORE_FUD`	Noise without actionable signal — hold
`INSUFFICIENT_DATA`	Pipeline degraded — do not act on this result

Next steps

Learn the Core Concepts behind the async job pattern and verdict schema
Read the full API Reference for endpoint details
Check Rate Limits & Pricing for production usage

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