# KushBitx AgentProof Quick Check

> KushBitx AgentProof Quick Check is a paid API for AI agents from kushbitx.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).

Performs a deterministic Base chain identity and official USDC contract-presence check, returning a PASS/FAIL status with chain ID and contract code verification.

## Facts

- Endpoint: GET https://kushbitx.com/api/agentproof-quick-check?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kushbitx-agentproof-quick-check-bd18c206
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gNbGj26q3OZOE6MgUsAGX

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 kushbitx-agentproof-quick-check-bd18c206
```

Example prompt: Before we do anything on Base, run the AgentProof quick check to confirm we're actually on chain 8453 and that the official USDC contract has code deployed at its address.

## When to prefer this

Use this endpoint when an AI agent needs a cheap, fast, deterministic sanity check that it is operating on the correct Base chain (ID 8453) and that the canonical USDC contract has deployed bytecode — before initiating any payments or on-chain actions. Prefer this over a full transaction simulation or token-risk report when you only need a binary PASS/FAIL environment check, not risk analysis or spend authorization.

## Known failure modes

- Chain ID mismatch — observed chain ID differs from expected 8453, status returns FAIL
- USDC contract code not present — no bytecode found at the expected address, codePresent returns false
- Upstream RPC or node unavailability — endpoint may return an error or timeout
- Payment not included — x402 payment of 0.001 USDC required per call; missing payment returns 402

## How this service works

A deterministic Base chain identity and official USDC contract-presence check. No request body. Not a token-risk report, transaction simulation, or payment proof.

## Output

Returns a JSON object with a top-level 'status' field ('PASS' or 'FAIL'), the network identifier ('eip155:8453'), and a 'checks' object containing: a 'chainId' sub-object with expected (8453), observed value, and a boolean match flag; and a 'usdcContract' sub-object with the contract address and a boolean 'codePresent' flag indicating whether bytecode exists at that address on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "checks": {
   "chainId": {
    "match": true,
    "expected": 8453,
    "observed": 8453
   },
   "usdcContract": {
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "codePresent": true
   }
  },
  "status": "PASS",
  "network": "eip155:8453",
  "service": "agentproof-quick-check"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kushbitx-agentproof-quick-check-bd18c206/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kushbitx.com](https://www.zero.xyz/host/kushbitx.com/llms.txt)