# Kerne kUSD Proof-of-Reserves Attestation

> Kerne kUSD Proof-of-Reserves Attestation is a paid API for AI agents from x402-gateway-omega.vercel.app, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Returns a cryptographically signed (EIP-191) hourly proof-of-reserves attestation for kUSD, including PSM backing ratio, aggregate USD solvency, and delta.

## Facts

- Endpoint: GET https://x402-gateway-omega.vercel.app/reserves
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kerne-kusd-proof-of-reserves-attestation-47004f89
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZS4H-1FGYoXPKHYsJfHul

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 kerne-kusd-proof-of-reserves-attestation-47004f89
```

Example prompt: Can you pull the latest signed proof-of-reserves for kUSD — I want to see the current PSM backing ratio, the aggregate solvency figure, and the delta, all with the EIP-191 signature so I can verify it myself?

## When to prefer this

Choose this endpoint when you need a cryptographically verifiable, machine-readable hourly reserve attestation for kUSD with an EIP-191 signature — especially in automated agent workflows that must audit stablecoin solvency or PSM backing without trusting a dashboard.

## Known failure modes

- Payment not received or x402 payment header missing — returns 402 Payment Required
- Attestation not yet generated for current hour — may return stale or 503
- Invalid or malformed request — returns 400
- Service unavailable on Vercel deployment — returns 503 or 504

## How this service works

Kerne's hourly EOA-signed proof-of-reserves attestation for kUSD: PSM backing ratio, aggregate USD solvency, delta, all cryptographically bound to an EIP-191 signature you can verify yourself. Same signed blob served free to humans; metered here for agents.

## Output

A signed JSON blob containing the hourly kUSD proof-of-reserves: PSM backing ratio, total USD solvency figure, reserve delta, and an EIP-191 cryptographic signature from Kerne's EOA that the caller can independently verify on-chain.

## 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": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kerne-kusd-proof-of-reserves-attestation-47004f89/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-gateway-omega.vercel.app](https://www.zero.xyz/host/x402-gateway-omega.vercel.app/llms.txt)