# Treasury Reality — Aave v3 Ethereum USDC Time-Weighted Supply APR (2026-09-24→2026-09-25)

> Treasury Reality — Aave v3 Ethereum USDC Time-Weighted Supply APR (2026-09-24→2026-09-25) is a paid API for AI agents from treasury-reality-base.fly.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-03).

Returns a cryptographically signed, time-weighted USDC supply APR for Aave v3 on Ethereum covering the 24-hour window from 2026-09-24 to 2026-09-25, with offline-verifiable secp256k1 signature and full recomputation schema.

## Facts

- Endpoint: GET https://treasury-reality-base.fly.dev/v1/artifacts/sha256:09d0776a3cd7cf335f7df765b494ebfa4a8e800d100c2b8003111e1cfdde4ba1?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/treasury-reality-aave-v3-ethereum-usdc-time-weighted-supply-apr-2026-6e31f610
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NVrYxwfI2BmZ2MnDOszBO

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 treasury-reality-aave-v3-ethereum-usdc-time-weighted-supply-apr-2026-6e31f610
```

Example prompt: Can you fetch the signed, verifiable Aave v3 USDC supply APR on Ethereum for September 24–25, 2026 — I want the cryptographically attested figure I can verify offline without trusting the source?

## When to prefer this

Choose this endpoint when you need a cryptographically attested, time-weighted DeFi yield figure for Aave v3 USDC on Ethereum for the specific 24-hour window of 2026-09-24 to 2026-09-25, and you want to avoid the compute cost of fetching contracts, decoding ray-scaled rates, and time-weighting the series yourself. Ideal for audits, treasury accounting, smart contract inputs, or any context where offline verifiability and tamper-evidence are required.

## Known failure modes

- Payment not received or invalid x402 payment header — returns 402 Payment Required
- Artifact not found at specified SHA256 hash — returns 404
- Network or upstream issue with fly.dev hosting — returns 5xx
- Signature verification fails offline if artifact has been tampered with

## How this service works

aave-v3-ethereum-usdc: USDC supply APR, time-weighted over 2026-09-24→2026-09-25, signed. Cheaper than the agent turns you'd burn finding the contracts, decoding ray-scaled rates, sampling the series, and time-weighting it — you trust the math, not us. Verify it offline — schema, every published figure recomputed, and the secp256k1 signature — with no API call and no trust in us.

## Output

A signed JSON artifact containing the time-weighted USDC supply APR for Aave v3 on Ethereum over the 2026-09-24 to 2026-09-25 window. Includes the computed APR value derived from ray-scaled on-chain rate samples, the full recomputation schema, and a secp256k1 cryptographic signature that allows offline verification of the figure without trusting the provider.

## 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": {
     "const": "http"
    },
    "method": {
     "const": "GET"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/treasury-reality-aave-v3-ethereum-usdc-time-weighted-supply-apr-2026-6e31f610/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from treasury-reality-base.fly.dev](https://www.zero.xyz/host/treasury-reality-base.fly.dev/llms.txt)