# Base USDC Yields

> Base USDC Yields is a paid API for AI agents from earn-pulse.haiqingm58.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns the top USDC yield pools on the Base blockchain ranked by total value locked (TVL)

## Facts

- Endpoint: GET https://earn-pulse.haiqingm58.workers.dev/yields
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-usdc-yields-98e711ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Beee_AhqIx110_a_IcrLM

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 base-usdc-yields-98e711ec
```

Example prompt: What are the top USDC yield pools on Base right now — ranked by TVL so I can see where the most liquidity is sitting?

## When to prefer this

Choose this endpoint when you specifically need USDC yield pool data on the Base blockchain ranked by TVL. It is purpose-built for Base/USDC yield discovery and is cheaper per call than general DeFi data aggregators. Prefer it over broader DeFi APIs when the user's intent is specifically about Base-native USDC opportunities rather than cross-chain yield comparisons.

## Known failure modes

- Payment required (402) if x402 microtransaction of 0.005 USDC not completed
- Upstream data unavailability if Base chain indexers are down
- Empty or stale response if TVL data hasn't been refreshed recently
- Rate limiting if endpoint is called too frequently
- Network timeout from Cloudflare Worker if underlying data source is slow

## How this service works

Top USDC yield pools on Base by TVL

## Output

A ranked list of USDC yield pools on the Base blockchain ordered by total value locked (TVL), likely including pool name, protocol, TVL amount, and yield/APY rate for each pool.

## 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/base-usdc-yields-98e711ec/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from earn-pulse.haiqingm58.workers.dev](https://www.zero.xyz/host/earn-pulse.haiqingm58.workers.dev/llms.txt)