# YieldSignal USDC Base Yield Durability Analysis

> YieldSignal USDC Base Yield Durability Analysis 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 breakdown of how much USDC lending APY on Base survives if incentive/reward programs stop, including base vs. reward split and the post-incentive APY floor.

## Facts

- Endpoint: GET https://yieldsignal.vercel.app/durability/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-yield-durability-analysis-86af644b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3FoyTxgumxiuyMMDRQVUo

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-yield-durability-analysis-86af644b
```

Example prompt: Break down the USDC lending APY on Base by protocol — show me how much of each protocol's yield is organic base rate versus incentives, and tell me which protocol still leads once the reward programs are stripped out.

## When to prefer this

Use this endpoint when you need to assess the durability and sustainability of USDC lending yields on Base specifically — distinguishing organic yield from incentive-driven APY inflation. Prefer this over raw APY feeds when making capital allocation decisions that depend on yield persistence, or when evaluating whether protocol rankings change in a post-incentive environment. Not for WETH, ETH staking, or non-Base chain yield analysis (separate sibling endpoints exist for those).

## Known failure modes

- Protocol data temporarily unavailable from on-chain or off-chain sources — may return partial results
- Some protocols listed as undecomposable if their reward components cannot be individually itemized
- Payment not processed (x402 payment required at $0.01 USDC per call)
- Stale data if on-chain reads are delayed

## How this service works

How much of the USDC lending APY on Base survives if incentives stop: per-protocol base-vs-reward split, the post-incentive floor, and whether the leader changes without incentives. Derived only from reported/inferred reward components already read — sources that do not itemize are listed as undecomposable, never assumed incentive-free. A stress test of current readings, not a date forecast. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

## Output

A structured report listing each USDC lending protocol on Base with: their total current APY split into base (organic) and reward (incentive) components; the post-incentive APY floor; a flag for protocols whose sources cannot be decomposed into base/reward; and an indicator of whether the current APY leader changes when incentives are excluded.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/yieldsignal-usdc-base-yield-durability-analysis-86af644b/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)