# YieldSignal USDC Base Yield Persistence Analytics

> YieldSignal USDC Base Yield Persistence Analytics is a paid API for AI agents from yieldsignal.vercel.app, paid per call via x402, $1/call, status unknown (last checked 2026-10-29).

Returns statistical persistence metrics for USDC lending yield leadership on Base — median lead duration, survival rates, rotation patterns, and alpha of chasing the leader — derived from hourly on-chain EAS attestations.

## Facts

- Endpoint: GET https://yieldsignal.vercel.app/persistence/usdc-base-yield?utm_source=zero.xyz
- Price: $1/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-persistence-analytics-92c92a90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4EAjQ5NwukT6DyHv49vz7

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-persistence-analytics-92c92a90
```

Example prompt: Tell me how persistent USDC yield leadership is on Base — how long the top protocol typically stays on top, the survival odds at 6, 24, and 72 hours, and whether it's actually worth $10k to chase the leader before gas costs.

## When to prefer this

Choose this endpoint when you need statistical evidence about whether USDC yield leadership on Base is sticky enough to justify rebalancing costs — specifically when you want survival-curve-style metrics, rotation frequency data, and measured alpha estimates grounded in actual on-chain history rather than simulations or forecasts. Prefer this over raw APY endpoints when the decision is about switching protocols rather than simply reading current rates.

## Known failure modes

- Insufficient on-chain attestation history may reduce sample sizes and confidence of survival estimates
- Payment not received or invalid x402 payment header returns 402 Payment Required
- Gas cost assumptions may be stale relative to current Base network conditions
- Endpoint may return cached data if attestations have not updated in the current hour

## How this service works

How long a USDC leadership call actually holds, from hourly on-chain attestations (EAS): median lead duration, survival at 6/24/72h, how much of the rotation is the same two protocols trading places, and what chasing the leader is worth per $10k before gas. Also reports whether a wider lead lasts longer — measured, and it does not. Observed history with sample sizes, never a forecast. Verified per-asset accuracy is free at /accuracy.json; raw on-chain attestations at /track-record.

## Output

Returns computed persistence statistics derived from hourly on-chain EAS attestations: median duration of USDC yield leadership on Base, Kaplan-Meier-style survival rates at 6h, 24h, and 72h, the proportion of rotations involving the same two protocols cycling back and forth, estimated alpha per $10k invested before gas costs, and a measured (not modeled) finding on whether a wider yield lead correlates with longer duration — plus observed sample sizes for all metrics.

## 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-persistence-analytics-92c92a90/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)