# WBTC/cbBTC Parity Monitor on Base

> WBTC/cbBTC Parity Monitor on Base is a paid API for AI agents from api.agentfeeds.jp, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Returns the current WBTC/cbBTC on-chain pool price deviation from 1:1 parity in basis points, plus a consecutive-minute streak count beyond a configurable deviation threshold.

## Facts

- Endpoint: GET https://api.agentfeeds.jp/v1/dex/wrapped/parity
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wbtc-cbbtc-parity-monitor-on-base-9ca9a1d4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XhmAVq55jBhV0FIWCJKyt

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 wbtc-cbbtc-parity-monitor-on-base-9ca9a1d4
```

Example prompt: What's the current WBTC/cbBTC parity deviation on Base right now, and how many consecutive minutes has it been beyond a 30 bps threshold?

## When to prefer this

Use this endpoint when you need a real-time, low-cost signal on whether WBTC and cbBTC are trading at parity on Base, especially for automated collateral-acceptance logic, DeFi risk monitoring, or arbitrage detection between BTC wrappers. Prefer this over general DEX price feeds when you specifically need the parity deviation metric and streak count for these two assets.

## Known failure modes

- On-chain data temporarily unavailable — service may return an error or stale data
- Invalid threshold_bps value (e.g. negative or non-numeric) — likely a 400 Bad Request
- Pool liquidity is zero or pool address is unreachable — may return null or error
- Payment not processed (x402) — 402 Payment Required returned before data is served
- Rate limiting or upstream RPC failure causing timeout

## How this service works

Wrapped-BTC parity monitor on Base: WBTC/cbBTC on-chain pool price vs 1:1 parity, in bps, plus consecutive-minute streak beyond a deviation threshold. Useful for collateral-acceptance decisions between BTC wrappers of the same underlying asset. Descriptive statistics only; not investment advice.

## Output

Returns the current deviation of the WBTC/cbBTC on-chain pool price from 1:1 parity expressed in basis points, plus the number of consecutive one-minute intervals during which the deviation has exceeded the specified threshold (default 20 bps). Useful for deciding whether to treat WBTC and cbBTC as equivalent collateral.

## 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": {
      "threshold_bps": {
       "type": "number",
       "description": "deviation threshold in bps for the streak counter, default 20"
      }
     }
    }
   },
   "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/wbtc-cbbtc-parity-monitor-on-base-9ca9a1d4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.agentfeeds.jp](https://www.zero.xyz/host/api.agentfeeds.jp/llms.txt)