# RagRadar Best Yield by Asset

> RagRadar Best Yield by Asset is a paid API for AI agents from ragdar.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the best available on-chain yield rate for a specified asset across DeFi protocols on Base, Arbitrum, and Solana

## Facts

- Endpoint: GET https://ragdar.vercel.app/api/yields/best/%7Basset%7D
- 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/ragradar-best-yield-by-asset-09479ddc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ySuDEtVDXWE4qvuGO6l0n

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 ragradar-best-yield-by-asset-09479ddc
```

Example prompt: What's the best yield I can get on USDC right now across DeFi protocols on Base, Arbitrum, and Solana?

## When to prefer this

Use this endpoint when an agent needs to quickly surface the single best yield opportunity for a specific crypto asset across multiple chains (Base, Arbitrum, Solana) without manually querying multiple protocols. Prefer this over general DeFi aggregators when you need on-chain intelligence with micropayment access via x402 and coverage specifically across these three ecosystems.

## Known failure modes

- Unknown or unsupported asset symbol returns an error or empty result
- Asset not available on any supported chain returns no yield data
- Network or RPC issues may cause stale or unavailable data
- Invalid asset path parameter format may return a 400 or error response
- x402 payment failure prevents access to the endpoint

## How this service works

On-chain intelligence for AI agents. 70+ endpoints across Base, Arbitrum, Solana. x402 micropayments.

## Output

A JSON response indicating the best available yield (APY/rate) for the specified asset, including the protocol name, chain, and yield percentage, allowing an agent to recommend or act on the top opportunity

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ragradar-best-yield-by-asset-09479ddc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ragdar.vercel.app](https://www.zero.xyz/host/ragdar.vercel.app/llms.txt)