# Crest DeFi Yield Opportunities

> Crest DeFi Yield Opportunities is a paid API for AI agents from data.crestsystems.ai, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).

Returns the top 20 DeFi yield opportunities ranked by APY, filtered to pools with over $1M TVL, including APY, TVL, project name, and chain.

## Facts

- Endpoint: GET https://data.crestsystems.ai/data/yields
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/data-crestsystems-ai-4ea45767
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w_3cA8pC78vapKzOlNuUR

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 data-crestsystems-ai-4ea45767
```

Example prompt: What are the top DeFi yield opportunities available right now? I want to see the best APYs across all chains, only pools with meaningful TVL.

## When to prefer this

Use this endpoint when an agent needs a quick, pre-ranked snapshot of the top DeFi yield opportunities without specifying a chain or protocol — ideal for portfolio scouting, DeFi opportunity discovery, or comparison tasks where breadth matters over depth. Prefer this over chain-specific DeFi overview endpoints when looking for cross-chain yield rankings.

## Known failure modes

- Payment failure (x402): insufficient USDC balance or missing payment header returns 402
- Upstream data unavailability: DeFi data provider outage may return empty or stale results
- Rate limiting: excessive calls may result in throttling responses
- No results: unlikely but possible if all tracked pools fall below $1M TVL threshold

## How this service works

Crest · defi_yields — Fetch top 20 DeFi yield opportunities. Returns APY, TVL, project name, and chain. Sorted by APY, filtered to pools above $1M TVL.

## Output

A list of up to 20 DeFi yield opportunities sorted by APY descending, each entry containing the APY percentage, total value locked (TVL in USD), the project/protocol name, and the blockchain chain — all filtered to pools with at least $1M TVL.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {}
 }
}
```

## 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": {}
    }
   },
   "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/data-crestsystems-ai-4ea45767/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.crestsystems.ai](https://www.zero.xyz/host/data.crestsystems.ai/llms.txt)