# BaseBuilder DeFi Stablecoin Yield API

> BaseBuilder DeFi Stablecoin Yield API is a paid API for AI agents from bbx-defi.vercel.app, paid per call via x402, $0.110043/call, status unknown (last checked 2026-10-09).

Returns current stablecoin yield opportunities and APY data across DeFi protocols on Base

## Facts

- Endpoint: POST https://bbx-defi.vercel.app/api/yield/stablecoin?utm_source=zero.xyz
- Price: $0.110043/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-09
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/basebuilder-defi-stablecoin-yield-api-598198f1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JTpDF_V8fDpAmrBKFaYf9

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 basebuilder-defi-stablecoin-yield-api-598198f1 -d '<json body>'
```

Example prompt: Find me the best stablecoin yield opportunities on Base right now — I want to park some USDC and earn passive income, so show me current APYs across all the major DeFi protocols.

## When to prefer this

Choose this endpoint when you specifically need stablecoin yield data on the Base blockchain from a curated DeFi aggregator. Prefer this over generic DeFi aggregators when you need Base-native protocol coverage and are building automated yield-optimization workflows that require programmatic access with per-call pricing.

## Known failure modes

- Protocol data unavailable or stale if underlying DeFi data source is down
- Empty result set if no protocols meet the filter criteria
- Payment required error (402) if USDC payment header is missing or insufficient
- Timeout if multiple protocol APIs are queried simultaneously
- Invalid parameter error if unsupported stablecoin ticker is provided

## How this service works

BaseBuilder Defi API hub - 22 paid endpoints

## Output

Returns a list of stablecoin yield opportunities across DeFi protocols on Base, including protocol name, stablecoin ticker, current APY, TVL, yield source type (lending, liquidity provision, etc.), and risk tier.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/basebuilder-defi-stablecoin-yield-api-598198f1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bbx-defi.vercel.app](https://www.zero.xyz/host/bbx-defi.vercel.app/llms.txt)