# Crest Wallet Intelligence – x402 Behavioral Profile

> Crest Wallet Intelligence – x402 Behavioral Profile is a paid API for AI agents from data.crestsystems.ai, paid per call via x402, $0.9/call, status down (last checked 2026-09-15).

Returns a deep behavioral and spending profile for any EVM wallet address based on its x402 pay-per-request payment history on Base mainnet.

## Facts

- Endpoint: GET https://data.crestsystems.ai/data/wallet/%7Baddress%7D
- Price: $0.9/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/crest-wallet-intelligence-x402-behavioral-profile-834599ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jmI4c6t7Qd44ohKelPaWO

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 crest-wallet-intelligence-x402-behavioral-profile-834599ad
```

Example prompt: Can you pull up the x402 behavioral profile for wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to know their whale score, spending trend, risk level, and which services they use most on Base mainnet?

## When to prefer this

Use this endpoint when you need to understand the on-chain x402 payment behavior of a specific wallet — their buyer tier, spending patterns, risk profile, and service usage — rather than general token holdings or DeFi positions. Prefer this over generic blockchain explorers when the agent needs structured intelligence scores and behavioral clusters rather than raw transaction data.

## Known failure modes

- Invalid or malformed wallet address (not 0x + 40 hex) returns 400 error
- Wallet has no x402 payment history on Base mainnet — may return empty profile or 404
- Payment of 0.9 USDC fails due to insufficient USDC balance on Base — 402 payment required error
- Rate limiting if too many requests are made in quick succession
- Stale data if wallet has very recent activity not yet indexed

## How this service works

Crypto market data, DeFi analytics, and x402 ecosystem intelligence via pay-per-request USDC on Base mainnet.

## Output

Returns a structured JSON profile including: behavioral cluster (e.g. premium_buyer), whale score, repeat rate, total USDC spent, number of services used, total payment count, average payment size, temporal activity patterns (peak hour, most active day), intelligence fields (spending trend, velocity percentile, risk level, confidence), and a ranked list of top services the wallet has paid for.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM wallet address to profile (0x + 40 hex characters). Any Base mainnet wallet with x402 payment history."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "profile": {
   "cluster": "premium_buyer",
   "active_days": 38,
   "repeat_rate": 0.73,
   "whale_score": 0.82,
   "last_payment": "2026-05-16T19:45:00Z",
   "first_payment": "2026-04-01T08:00:00Z",
   "premium_ratio": 0.61,
   "services_used": 11,
   "total_payments": 142,
   "avg_payment_usdc": 2.01,
   "total_spent_usdc": 285.5
  },
  "sources": [
   "base:mainnet:usdc-transfers",
   "crest:profiler:v2"
  ],
  "temporal": {
   "peak_hour_utc": 14,
   "most_active_day": "Tuesday",
   "avg_payments_per_day": 3.7
  },
  "queriedAt": "2026-05-16T20:00:00.000Z",
  "intelligence": {
   "behavior": "premium_buyer",
   "is_whale": true,
   "confidence": 0.94,
   "risk_level": "low",
   "spending_trend": "increasing",
   "velocity_rank_percentile": 92
  },
  "top_services": [
   {
    "calls": 35,
    "avg_price": 3.01,
    "last_used": "2026-05-16T19:30:00Z",
    "spent_usdc": 105.2,
    "service_address": "0x5d6dF6b10C54617dac4Bf9993ad9fA384b7B36d3"
   },
   {
    "calls": 22,
    "avg_price": 2.05,
    "spent_usdc": 45,
    "service_address": "0x6d6E695bB2F5e5F0DeBd3E2b15f111Fb56F3d5b21"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/crest-wallet-intelligence-x402-behavioral-profile-834599ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.crestsystems.ai](https://www.zero.xyz/host/data.crestsystems.ai/llms.txt)