# Saylor Innovations Data Desk – DeFi Protocol Fees

> Saylor Innovations Data Desk – DeFi Protocol Fees is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns top DeFi protocols ranked by 24h fees or revenue on any chain, with 7-day and 30-day totals, category filters, and percentage changes

## Facts

- Endpoint: GET https://saylorinnovations.com/api/defi/fees?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-data-desk-defi-protocol-fees-2be516f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RiroVgBNWNm08SLqMjeQm

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 saylor-innovations-data-desk-defi-protocol-fees-2be516f5
```

Example prompt: What are the top 10 DeFi protocols by fees generated in the last 24 hours on Ethereum, and how have their revenues changed over the past 7 days?

## When to prefer this

Choose this endpoint when you need ranked, multi-timeframe DeFi fee or revenue data across major blockchains without building your own aggregation pipeline. It is especially useful for monitoring fee trends, comparing protocols by category, or tracking ecosystem health on a specific chain like Ethereum, Solana, Base, or Arbitrum.

## Known failure modes

- Invalid chain name returns error or empty results
- Limit out of range (>50 or <1) may return default of 10 results
- Data freshness lag if upstream source (e.g. DefiLlama) is delayed
- Missing or null values for protocols with incomplete on-chain data
- 429 or payment required if x402 payment not processed correctly

## How this service works

DeFi protocol fees - top protocols by 24h fees or revenue on any chain with 7d and 30d totals, category filter and change percent

## Output

A JSON object containing the queried chain name, the fee metric measured, a ranked array of top DeFi protocols each with their 24h/7d/30d USD fee totals, category, supported chains, and percentage change over 1 day, 7 days, and 1 month, plus a data source attribution and UTC timestamp of when the data was checked.

## 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": {
      "chain": {
       "type": "string",
       "description": "optional chain, e.g. ethereum, solana, base, arbitrum"
      },
      "limit": {
       "type": "string",
       "description": "optional 1-50, default 10"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "chain",
      "top"
     ],
     "properties": {
      "top": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "name": {
          "type": "string",
          "description": "Name"
         },
         "slug": {
          "description": "URL-safe identifier"
         },
         "chains": {
          "description": "Chains covered"
         },
         "category": {
          "type": [
           "string",
           "null"
          ],
          "description": "Category"
         },
         "total_7d_usd": {
          "type": [
           "number",
           "null"
          ],
          "description": "Total 7d usd"
         },
         "change_1d_pct": {
          "description": "Change over 1 day, percent"
         },
         "change_1m_pct": {
          "description": "Change over 1 month, percent"
         },
         "change_7d_pct": {
          "type": [
           "number",
           "null"
          ],
          "description": "Change over 7 days, percent"
         },
         "total_24h_usd": {
          "type": "number",
          "description": "Total 24h usd"
         },
         "total_30d_usd": {
          "description": "Total 30d usd"
         }
        }
       },
       "description": "Top-ranked items"
      },
      "chain": {
       "type": "string",
       "description": "Blockchain the data is for"
      },
      "metric": {
       "type": "string",
       "description": "Metric the figures measure"
      },
      "source": {
       "type": [
       
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-data-desk-defi-protocol-fees-2be516f5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)