# agenttoll.app ETH Price Alert Check

> agenttoll.app ETH Price Alert Check is a paid API for AI agents from agenttoll.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Checks whether ETH (or another crypto asset) has moved past a user-defined percentage threshold relative to a reference price

## Facts

- Endpoint: GET https://agenttoll.app/api/watch/price/eth
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttoll-app-eth-price-alert-check-23012b6a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_C6KzeamnUrPMJpnpcJQ_q

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 agenttoll-app-eth-price-alert-check-23012b6a
```

Example prompt: Check if ETH has moved more than 4% from my reference price of $3200 — tell me if the threshold has been breached.

## When to prefer this

Choose this endpoint when an agent needs a lightweight, single-call boolean-style check on whether a crypto asset has moved past a user-defined price threshold — ideal for scheduled monitoring agents, conditional trade logic, or notification triggers where you already have a reference price and want to avoid building your own price-comparison logic.

## Known failure modes

- Unknown or unsupported symbol returns an error
- Missing required 'ref' query parameter causes a bad request response
- Network or pricing data unavailability results in a timeout or 5xx error
- Payment failure (insufficient USDC balance) returns a 402 Payment Required

## How this service works

Price alert check: has an asset moved past your threshold?

## Output

Returns whether the asset's current price has breached the specified percentage threshold relative to the provided reference price, along with the current price and the magnitude of the move.

## 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"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "symbol"
     ],
     "properties": {
      "symbol": {
       "type": "string",
       "description": "Ticker or CoinGecko id"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "ref"
     ],
     "properties": {
      "pct": {
       "type": "number",
       "description": "Threshold in percent, default 2"
      },
      "ref": {
       "type": "number",
       "description": "Reference price in USD to compare against"
      }
     }
    }
   },
   "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/agenttoll-app-eth-price-alert-check-23012b6a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agenttoll.app](https://www.zero.xyz/host/agenttoll.app/llms.txt)