# Agent Signals — Japan Crypto Premium Intelligence (x402)

> Agent Signals — Japan Crypto Premium Intelligence (x402) is a paid API for AI agents from cryptojp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns the Japan crypto price premium percentage for a given asset (e.g. BTC) versus global prices, with USD/JPY rate and interpretation, paid per-call via x402 USDC.

## Facts

- Endpoint: GET https://cryptojp.com/v1/jp/premium
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-signals-japan-crypto-premium-intelligence-x402-d4b16952
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0_AKQEstQljKymihxBkVb

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 agent-signals-japan-crypto-premium-intelligence-x402-d4b16952
```

Example prompt: What's the current Japan crypto premium for BTC — is it trading meaningfully higher in Japan than globally right now?

## When to prefer this

Use this endpoint when an AI trading agent needs real-time Japan-specific crypto price premium data (Japan price vs. global price) for a JPY-listed asset, particularly for arbitrage signal detection, regional market intelligence, or monitoring Japan exchange premiums. Best suited for agents already integrated with x402 micropayment flows at $0.01 per call.

## Known failure modes

- Invalid or unsupported symbol returns an error (only JPY-listed assets like BTC, ETH, XRP are supported)
- Payment failure via x402 returns HTTP 402 if USDC payment is not settled
- Missing required 'symbol' query parameter causes a 400 validation error
- Stale or unavailable exchange data may result in degraded or missing price fields

## How this service works

Pay-per-call crypto market-intelligence API for autonomous AI trading agents. Funding-rate, BTC lead-lag and trend/chop regime signals, settled in USDC over x402.

## Output

A JSON object with ok status, base asset symbol, USD/JPY exchange rate, Japan price in JPY, Japan price in USD, global price in USD, premium percentage, and a plain-English interpretation of whether the Japan premium is meaningful.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "symbol": "BTC"
  }
 }
}
```

## 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",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Base asset symbol (JPY-listed), e.g. BTC, ETH, XRP."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "base": "BTC",
  "usdJpy": 160.36,
  "premiumPct": 0.078,
  "japanPriceJpy": 10318000,
  "japanPriceUsd": 64350.1,
  "globalPriceUsd": 64300,
  "interpretation": "Japan ≈ global; no meaningful premium right now."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-signals-japan-crypto-premium-intelligence-x402-d4b16952/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cryptojp.com](https://www.zero.xyz/host/cryptojp.com/llms.txt)