# SperaxOS Yield Vaults Data API

> SperaxOS Yield Vaults Data API is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-19).

Returns DeFi yield vault listings and APY data from SperaxOS, payable per-request with USDC via x402

## Facts

- Endpoint: GET https://chat.sperax.io/api/x402/v1/data/yield-vaults?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speraxos-yield-vaults-data-api-80ef40a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GguRHVq32VoJScOTatc1T

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 speraxos-yield-vaults-data-api-80ef40a8
```

Example prompt: Show me the available yield vaults on SperaxOS — I want to see what's offering the best APY right now on Base so I can decide where to park my USDC.

## When to prefer this

Choose this endpoint when you need current yield vault data specific to the Sperax/SperaxOS ecosystem on Base, especially if you want no API key overhead and are comfortable with per-request USDC micropayments via x402. Prefer this over generic DeFi aggregators when specifically researching Sperax-native vaults or when building agents that need pay-as-you-go DeFi intelligence without subscription commitments.

## Known failure modes

- Payment not included or insufficient USDC — returns HTTP 402 requiring x402 payment
- Invalid or malformed properties filter parameter — may return empty results or 400 error
- Vault data temporarily unavailable due to upstream DeFi protocol issues
- Rate limiting if requests are sent too rapidly without valid payments
- Network issues on Base chain affecting real-time vault data freshness

## How this service works

AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.

## Output

A list of available yield vaults on the Sperax platform, including vault identifiers, underlying assets, APY/yield rates, protocol details, and relevant vault metadata for DeFi decision-making.

## Request schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speraxos-yield-vaults-data-api-80ef40a8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.sperax.io](https://www.zero.xyz/host/chat.sperax.io/llms.txt)