# CEX Exchange Reserve Snapshot (ETH Balances)

> CEX Exchange Reserve Snapshot (ETH Balances) is a paid API for AI agents from api.fadeandco.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns a snapshot of native ETH balances for up to 10 community-labeled wallet addresses belonging to Binance, Coinbase, or OKX on Ethereum mainnet.

## Facts

- Endpoint: GET https://api.fadeandco.workers.dev/api/agent-intel/cex-exchange-reserve-flows?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cex-exchange-reserve-snapshot-eth-balances-e60ea5b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UrwWQ_1DmV0WXhstg8XyO

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 cex-exchange-reserve-snapshot-eth-balances-e60ea5b3
```

Example prompt: Can you pull the on-chain ETH balance snapshot for Binance's labeled wallets on Ethereum — I want to see how much native ETH those community-tagged addresses are holding right now?

## When to prefer this

Use this endpoint when you need a quick, lightweight on-chain ETH balance snapshot for community-labeled Binance, Coinbase, or OKX wallets without needing full reserve accounting, token balances, or historical flow data. Prefer this over full blockchain analytics platforms when cost, speed, and simplicity matter more than completeness. Not suitable for compliance, auditing, or precise reserve verification.

## Known failure modes

- Invalid exchange name returns an error or defaults to binance
- Community labels may be outdated, causing incorrect wallet attribution
- Only up to 10 wallets sampled — does not represent total exchange reserves
- Public Ethereum RPC node may be slow or temporarily unavailable, causing timeouts
- No token balances or flow history available — only native ETH snapshots

## How this service works

Ethereum native-ETH balance snapshot of up to 10 wallets that a community label dataset (brianleect/etherscan-labels, GitHub) tags as Binance, Coinbase or OKX. It is a snapshot of a sample, not total exchange reserves: no token balances, no inflow or outflow history, and the labels are community-made and may be out of date.

## Output

Returns a JSON object with: the queried exchange name, a checkedAt timestamp, the number of wallets sampled, the number of wallets with a non-zero balance, the total ETH balance across the sample, and an array of individual wallet entries each with name, address, and balanceEth. Includes a note clarifying this is a community-labeled sample snapshot, not total reserves, and lists the data sources used.

## 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": {
      "exchange": {
       "type": "string",
       "description": "binance, coinbase or okx (default binance)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Snapshot of up to 10 labelled wallets only. Not total reserves; no flows or token balances. Labels are community-made.",
  "source": "https://raw.githubusercontent.com/brianleect/etherscan-labels/main/data/etherscan/combined/combinedAccountLabels.json ; https://ethereum-rpc.publicnode.com",
  "wallets": [
   {
    "name": "Binance",
    "address": "0x3f5ce5fbfe3e9af3971dd833d26ba9b5c936f0be",
    "balanceEth": "3.171494"
   },
   {
    "name": "Binance 10",
    "address": "0x85b931a32a0725be14285b66f1a22178c672d69b",
    "balanceEth": "0.070457"
   }
  ],
  "exchange": "binance",
  "checkedAt": "2026-10-23T09:35:20.717Z",
  "walletsSampled": 10,
  "walletsWithBalance": 10,
  "totalBalanceEthOfSample": 199573.899219
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cex-exchange-reserve-snapshot-eth-balances-e60ea5b3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fadeandco.workers.dev](https://www.zero.xyz/host/api.fadeandco.workers.dev/llms.txt)