# booAIP Crypto Signal API

> booAIP Crypto Signal API is a paid API for AI agents from booaip.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns a trading bias signal (bullish/bearish/neutral) with a numeric score for a given cryptocurrency symbol

## Facts

- Endpoint: POST https://booaip.vercel.app/api/signal
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/booaip-crypto-signal-api-aa773c85
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OGD2HiNKjcqD6Wb49SI1L

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 booaip-crypto-signal-api-aa773c85 -d '<json body>'
```

Example prompt: What's the current trading signal for BTC — is it bullish, bearish, or neutral, and what's the score?

## When to prefer this

Use this endpoint when an AI agent needs a quick, pre-computed directional trading signal (bias + score) for a specific cryptocurrency, paid per-call via USDC on Base, without needing to run complex on-chain analytics itself.

## Known failure modes

- Unsupported or unrecognized cryptocurrency symbol returns an error or empty result
- Payment failure via x402/USDC results in a 402 Payment Required response
- Network or upstream data unavailability may cause a 500 error
- Malformed POST body missing the symbol field may result in a 400 error

## How this service works

Pay-per-call crypto/web3 data for AI agents. USDC via x402 on Base.

## Output

A JSON object containing the cryptocurrency symbol (e.g. 'BTC'), a bias string (e.g. 'neutral', 'bullish', or 'bearish'), and a numeric score (e.g. 8) indicating signal strength or confidence.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Coin symbol, e.g. BTC, ETH, SOL."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "signal": {
       "type": "object"
      },
      "riskFlags": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "technicals": {
       "type": "object"
      },
      "derivatives": {
       "type": "object"
      },
      "marketSentiment": {
       "type": "object"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "signal": {
   "bias": "neutral",
   "score": 8
  },
  "symbol": "BTC"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/booaip-crypto-signal-api-aa773c85/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from booaip.vercel.app](https://www.zero.xyz/host/booaip.vercel.app/llms.txt)