# VAPE Chain Fees

> VAPE Chain Fees is a paid API for AI agents from vape-x402.vapex402.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns fee-earning protocols on a blockchain chain ranked by fees generated, with logos, reflecting real economic activity rather than parked capital.

## Facts

- Endpoint: GET https://vape-x402.vapex402.workers.dev/data/chain_fees
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vape-chain-fees-8207fa4b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kF6j9Uv84nqBCAxGsRKcp

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 vape-chain-fees-8207fa4b
```

Example prompt: Show me which protocols are earning the most fees on Base right now — I want to see real economic activity, not just TVL, ranked with their logos.

## When to prefer this

Use this endpoint when you need to assess which protocols on a chain are generating real economic activity through fees, as opposed to raw TVL which can include idle capital. Best for DeFi research, protocol comparison, or identifying actively-used dApps on Base or other supported chains.

## Known failure modes

- Unsupported or misspelled chain slug returns an error or empty result
- Network or worker timeout returning a 5xx error
- Payment of $0.01 USDC not completed, resulting in 402 Payment Required
- Chain has no tracked fee data, returning an empty array

## How this service works

VAPE chain_fees — Fee-earning protocols on a chain, ranked, each with its logo (default Base) — the chain's real economic activity, not just parked capital.

## Output

A ranked list of fee-earning protocols on the specified chain (default Base), each with its logo, fee metrics, and rank — representing genuine on-chain economic activity from protocol usage rather than passive capital.

## 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": {
      "chain": {
       "type": "string",
       "description": "chain slug, default 'base'"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "chain": "base",
  "protocols": [
   {
    "logo": "https://...",
    "name": "Aerodrome",
    "fees_24h": 120000
   }
  ],
  "total_fees_24h": 300000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vape-chain-fees-8207fa4b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vape-x402.vapex402.workers.dev](https://www.zero.xyz/host/vape-x402.vapex402.workers.dev/llms.txt)