# YieldSignal USDC-Base Exit Capacity

> YieldSignal USDC-Base Exit Capacity is a paid API for AI agents from yieldsignal.vercel.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-29).

Returns per-protocol exit capacity for USDC lending on Base, including utilization rates and withdrawable liquidity from Aave and Compound, with an optional verdict on whether a specific position size can be withdrawn right now.

## Facts

- Endpoint: GET https://yieldsignal.vercel.app/capacity/usdc-base-yield?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/yieldsignal-usdc-base-exit-capacity-2dbc5cf4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VR2no9UGjDspJTKrdSj4F

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 yieldsignal-usdc-base-exit-capacity-2dbc5cf4
```

Example prompt: I have $350,000 in a USDC lending position on Base — can you check the exit capacity across Aave and Compound and tell me whether I can actually withdraw that full amount right now?

## When to prefer this

Choose this endpoint when you need to verify actual withdrawable liquidity for USDC on Base before executing or planning a large exit from lending protocols. It is specifically suited for agents managing DeFi lending positions who need on-chain verified exit capacity rather than estimated or assumed liquidity. Prefer it over general APY or rate endpoints when the question is 'can I get out?' rather than 'what am I earning?'

## Known failure modes

- Protocol data unavailable on-chain — endpoint may mark protocol as unmeasured rather than error
- Invalid or negative amountUsd parameter — likely returns 400 or validation error
- RPC/node failures reading Base chain data — may return stale or partial data
- Payment not processed (x402) — returns 402 with payment instructions before data is served
- Very large amountUsd values that exceed all available liquidity — verdict returns false with liquidity figures

## How this service works

Exit capacity for USDC lending on Base: per-protocol utilization and withdrawable liquidity read from the protocol's own books (Aave, Compound), plus whether your size (?amountUsd=) can be withdrawn right now and what share of the market it would be. Protocols that do not expose borrowed-vs-supplied are marked unmeasured, never assumed liquid. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

## Output

A per-protocol breakdown of USDC lending exit capacity on Base, including current utilization rates and withdrawable liquidity for Aave and Compound. If ?amountUsd= is provided, includes a boolean verdict on whether that size can be withdrawn immediately and what share of the total market it would represent. Protocols that don't expose borrowed-vs-supplied data are flagged as unmeasured rather than assumed liquid.

## 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": {
      "amountUsd": {
       "type": "number",
       "description": "Position size in USD to test for exit. Omit to get utilization and free liquidity without a verdict."
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/yieldsignal-usdc-base-exit-capacity-2dbc5cf4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from yieldsignal.vercel.app](https://www.zero.xyz/host/yieldsignal.vercel.app/llms.txt)