# MCPFax Markets — DeFi Yield Pools

> MCPFax Markets — DeFi Yield Pools is a paid API for AI agents from mcpfax-markets.bowling-anthony.workers.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Returns DeFi yield pool data including APY, TVL, and protocol details across chains, sourced from DeFiLlama-style aggregation.

## Facts

- Endpoint: GET https://mcpfax-markets.bowling-anthony.workers.dev/defi/yields
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mcpfax-markets-defi-yield-pools-a7d24f59
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r6LgWFFdaiPDw4W4NM8v0

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 mcpfax-markets-defi-yield-pools-a7d24f59
```

Example prompt: What are the highest-yielding DeFi pools for USDC right now? Show me pools with APY above 5%, and include the protocol name and chain for each.

## When to prefer this

Choose this endpoint when you need aggregated DeFi yield pool data across multiple protocols and chains in a single call. Prefer over manual protocol-by-protocol queries when comparing yields broadly. Use alongside the defi_protocols endpoint for richer protocol context.

## Known failure modes

- Payment not included or invalid x402 payment header returns 402 error
- Upstream DeFi data source unavailable returns 503 or empty result
- Invalid filter parameters return empty pool list or 400 error
- Rate limiting if called excessively in short period

## How this service works

MCPFax markets — DeFi yield pools (defi_yields). Price: $0.002 USDC per call on Base.

## Output

A list of DeFi yield pools with fields such as pool name, underlying tokens, APY (annual percentage yield), TVL (total value locked in USD), protocol name, blockchain network, and reward token details.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mcpfax-markets-defi-yield-pools-a7d24f59/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcpfax-markets.bowling-anthony.workers.dev](https://www.zero.xyz/host/mcpfax-markets.bowling-anthony.workers.dev/llms.txt)