# FiatDock Address Intelligence (Base)

> FiatDock Address Intelligence (Base) is a paid API for AI agents from fiatdock.com, paid per call via x402, $0.0045/call, status unknown (last checked 2026-10-10).

Returns a full intelligence profile for any Base address: EOA vs. contract classification, ERC-20 token metadata, nonce, ETH/USDC balances, and a GoPlus security verdict (phishing, sanctioned, mixer, etc.).

## Facts

- Endpoint: GET https://fiatdock.com/v1/chain/address-intel?utm_source=zero.xyz
- Price: $0.0045/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fiatdock-address-intelligence-base-eee71d8b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2GYKlsaW3dONjhHMwwTZo

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 fiatdock-address-intelligence-base-eee71d8b
```

Example prompt: Before I send USDC to 0x742d35Cc6634C0532925a3b8D4C9b6E1d8f1234A on Base, can you pull a full intelligence report — check whether it's an EOA or contract, its ETH and USDC balances, and whether GoPlus has flagged it as phishing, sanctioned, or a mixer?

## When to prefer this

Use this endpoint when you need a single comprehensive profile of a Base address before transacting — it bundles address classification, balance lookup, and GoPlus security screening into one pay-per-call request. Prefer it over separate balance or token-metadata endpoints when triaging an unknown counterparty, auditing a suspicious address, or building an agent workflow that must gate payments on a clean security verdict.

## Known failure modes

- Invalid or malformed address returns a 400 error
- Address not found on Base returns empty/zero balances with no flags
- GoPlus service unavailability may result in missing or null security verdict
- Network congestion may cause stale data (asOf timestamp may lag)
- Payment failure via x402 protocol returns 402 Payment Required

## How this service works

Address intelligence on Base — EOA/contract/ERC-20 + nonce + ETH/USDC balance + keyless GoPlus security verdict (phishing/sanctioned/mixer/…). The loop input for triaging a counterparty. Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.

## Output

A JSON object containing: timestamp (asOf), address type (EOA/contract/erc20_contract), nonce, ETH balance (wei string), USDC balance, isContract boolean, network (base), ERC-20 token details if applicable (name, symbol, decimals), GoPlus security object with verdict (clean/malicious), isMalicious boolean, and an array of risk flags (phishing, sanctioned, mixer, etc.), plus a human-readable summary string.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "address": {
       "type": "string",
       "description": "A 40-hex EVM address (0x…) on Base. Omit the whole body to get the paying wallet."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asOf": "2026-07-30T00:00:00.000Z",
  "type": "erc20_contract",
  "nonce": 1,
  "token": {
   "name": "USD Coin",
   "symbol": "USDC",
   "decimals": 6
  },
  "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "isErc20": true,
  "network": "base",
  "summary": "erc20_contract, no GoPlus risk flags",
  "security": {
   "flags": [],
   "source": "GoPlus",
   "verdict": "clean",
   "isMalicious": false
  },
  "ethBalance": "0",
  "isContract": true,
  "usdcBalance": "0"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fiatdock-address-intelligence-base-eee71d8b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fiatdock.com](https://www.zero.xyz/host/fiatdock.com/llms.txt)