# EventEdge Oracle Market Change Watch

> EventEdge Oracle Market Change Watch is a paid API for AI agents from edge.arakelproof.space, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-19).

Monitors prediction market changes and compares cross-market data for a given topic or event term, returning machine-readable snapshots without executing trades.

## Facts

- Endpoint: GET https://edge.arakelproof.space/v1/market/change-watch
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/eventedge-oracle-market-change-watch-89f74335
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LzPknUvl4yR16khWRtHXb

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 eventedge-oracle-market-change-watch-89f74335
```

Example prompt: Can you watch for any changes in prediction market odds around the US presidential election across different markets and give me a machine-readable snapshot right now?

## When to prefer this

Choose this endpoint when you need structured, machine-readable prediction market monitoring and cross-market comparison data for a specific event, topic, or entity — especially when you want to programmatically track changes over time without executing any trades. Prefer this over generic financial data APIs when your focus is event-based probability markets rather than traditional price feeds.

## Known failure modes

- Missing or empty 'term' query parameter returns no meaningful market data
- Unknown or overly niche term may return empty results if no markets exist
- Payment failure (402) if x402 micropayment of $0.005 USDC is not completed
- Rate limiting if the endpoint is called too frequently
- Stale data if prediction market sources have not updated recently

## How this service works

Machine-readable prediction-market monitoring and cross-market comparison. No trade execution.

## Output

A JSON object conforming to schema 'eventedge.market-change-watch.v1', including a generated timestamp, a no_trade_execution flag, and cross-market prediction data relevant to the queried term. Provides machine-readable market change information suitable for programmatic consumption.

## 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": [],
     "properties": {
      "term": {
       "type": "string",
       "description": "Event, topic, company, person, or market concept"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "schema": "eventedge.market-change-watch.v1",
  "generated_at": "2026-09-14T00:00:00Z",
  "no_trade_execution": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/eventedge-oracle-market-change-watch-89f74335/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from edge.arakelproof.space](https://www.zero.xyz/host/edge.arakelproof.space/llms.txt)