# APEX Arc USDC Yield Vaults

> APEX Arc USDC Yield Vaults is a paid API for AI agents from apexfaucet.xyz, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Returns all Morpho lending vaults on Arc with current APY rates, vault sizes, and real-time USDC withdrawable amounts, refreshed from chain every 15 minutes

## Facts

- Endpoint: GET https://apexfaucet.xyz/api/x402/arc-yield?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apex-arc-usdc-yield-vaults-392fffb2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iE8_8uipRtNNMtlSgjZp3

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 apex-arc-usdc-yield-vaults-392fffb2
```

Example prompt: What USDC yield vaults are available on Arc right now — show me their APYs, how big each vault is, and how much I could actually withdraw today, especially the best rate I can still exit from?

## When to prefer this

Use this endpoint when you need real-time USDC yield intelligence specifically on Arc's Morpho Vault V2 ecosystem (Circle Earn Kit vaults), especially when liquidity and actual withdrawability matter — not just headline APY. Prefer this over generic DeFi aggregators when you need Arc-native, on-chain-verified data including idle USDC and free market supply calculations.

## Known failure modes

- On-chain RPC unavailability may cause stale or missing data beyond the 15-minute cache window
- A vault's withdrawableNow may be 0 if all underlying market supply is fully utilized
- Response may return ok:false if the upstream Arc node is unreachable
- Individual vault entries may be missing or incomplete if a specific Morpho vault is unresponsive

## How this service works

USDC yield on Arc: every Morpho lending vault with rate, size and how much you can withdraw right now, read on chain every 15 minutes. Yield on Arc before you deposit: every lending vault Circle Earn Kit lists on Arc (Morpho Vault V2: Galaxy, Keyrock, Steakhouse, Gauntlet, Bitwise and more) with its rate (Circle's figure), its size, and how much a depositor can actually withdraw at this block (idle USDC plus the free supply of the market its withdraw path draws from, read on chain), where each…

## Output

A JSON object with a timestamp, chain ID, list of all Morpho USDC lending vaults on Arc (each with name, address, APY, vault size, and withdrawable USDC at current block), aggregate totals (number of vaults, total USDC deposited, total withdrawable USDC), and a highlighted best-rate vault you can actually exit from right now. Data is read on-chain and cached for up to 15 minutes.

## 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"
    }
   }
  },
  "output": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "schema": {
  "type": "object",
  "properties": {
   "ok": {
    "type": "boolean"
   },
   "data": {
    "type": "object"
   },
   "paid": {
    "type": "number"
   }
  }
 },
 "example": {
  "ok": true,
  "data": {
   "at": "2026-10-07T12:03:17.610Z",
   "ok": true,
   "chain": "arc",
   "method": "Vaults named by Circle Earn Kit (explore…",
   "totals": {
    "vaults": 30,
    "readable": 30,
    "usdcInVaults": 170292755.867231,
    "usdcWithdrawableNow": 384662.225054
   },
   "vaults": [
    {}
   ],
   "chainId": 5042,
   "meaning": "withdrawableNow is what a depositor can …",
   "ageSeconds": 111,
   "centrifuge": "Centrifuge tokenized funds (JTRSY US Tre…",
   "bestRateYouCanExit": {
    "apy": 0.04351115006225508,
    "name": "Bitwise Premium RWA USDC",
    "address": "0x7610094b846657dcf166d59e42973db52c7015…",
    "withdrawableNow": 42041.306563
   }
  },
  "paid": 0.003
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apex-arc-usdc-yield-vaults-392fffb2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from apexfaucet.xyz](https://www.zero.xyz/host/apexfaucet.xyz/llms.txt)