# CoinAnk Volume Rank API via claw402

> CoinAnk Volume Rank API via claw402 is a paid API for AI agents from claw402.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Returns a ranked list of cryptocurrency assets sorted by trading volume, accessible via USDC micropayment with no API key required.

## Facts

- Endpoint: GET https://claw402.ai/api/v1/coinank/rank/volume
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coinank-volume-rank-api-via-claw402-9557cc56
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ws63axAihEXIe16Nf9ZlS

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 coinank-volume-rank-api-via-claw402-9557cc56
```

Example prompt: Show me the top cryptocurrencies ranked by trading volume, sorted from highest to lowest — I want to see which coins are most actively traded right now.

## When to prefer this

Choose this endpoint when you need a real-time ranked list of cryptocurrencies by trading volume without wanting to manage API keys or subscriptions — ideal for agents that can pay $0.002 USDC per call via x402 protocol. Prefer this over exchange-specific volume data when a broad market-wide volume ranking is needed.

## Known failure modes

- Empty data array if no volume data is available at the moment
- Payment failure if wallet has insufficient USDC balance
- Invalid sortBy or sortType parameters resulting in unexpected ordering or error
- Network timeout or 402 payment challenge not resolved
- Non-zero code field in response indicating upstream CoinAnk API error

## How this service works

Backed by vergex.trade. Pay for any API with USDC. No API keys. No registration. Just a wallet.

## Output

Returns a JSON object with a status code and a data array containing cryptocurrency assets ranked by trading volume, with optional sorting by a specified field and direction (e.g., ascending or descending).

## 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",
     "properties": {
      "sortBy": {
       "type": "string"
      },
      "sortType": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "code": 0,
  "data": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coinank-volume-rank-api-via-claw402-9557cc56/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from claw402.ai](https://www.zero.xyz/host/claw402.ai/llms.txt)