# AgentToll Cross-Platform Prediction Market Scanner

> AgentToll Cross-Platform Prediction Market Scanner is a paid API for AI agents from tollbooth.memerhuwhite.workers.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Scans multiple prediction market platforms (Polymarket, Kalshi) simultaneously for a given query to surface matching markets and cross-platform arbitrage opportunities

## Facts

- Endpoint: POST https://tollbooth.memerhuwhite.workers.dev/paid/markets/cross-platform-scan
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agenttoll-cross-platform-prediction-market-scanner-78d51ac8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_48cvGdGDopxDotP_dF3O5

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-cross-platform-prediction-market-scanner-78d51ac8 -d '<json body>'
```

Example prompt: Search for prediction markets about 'Fed rate cut in 2025' across both Polymarket and Kalshi and tell me if there are any arbitrage opportunities between the platforms.

## When to prefer this

Use this endpoint when you need to search for prediction markets on a specific topic across multiple platforms simultaneously and want to identify arbitrage or comparison opportunities. Prefer this over single-platform lookups when cross-platform visibility matters.

## Known failure modes

- No markets found for query — opportunities and candidate_matches arrays return empty
- External prediction market API downtime — partial or no results returned
- Malformed or overly broad query — returns empty result set
- Payment failure via x402 — call not executed

## How this service works

100+ paid x402 MCP tools for AI agents. Prediction markets, SEC filings, federal data, OSINT, academic research, health, environmental. Pay per call in USDC on Base.

## Output

Returns a JSON object containing the query used, the source platforms queried (e.g. Polymarket Gamma API, Kalshi public Trade API), a list of cross-platform arbitrage opportunities, and candidate market matches found across platforms.

## 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": [
      "query"
     ],
     "properties": {
      "query": {
       "type": "string",
       "maxLength": 100,
       "minLength": 2
      },
      "max_matches": {
       "type": "integer",
       "maximum": 50,
       "minimum": 1
      },
      "min_net_edge": {
       "type": "number",
       "maximum": 0.5,
       "minimum": 0
      },
      "min_similarity": {
       "type": "number",
       "maximum": 1,
       "minimum": 0.4
      },
      "kalshi_max_pages": {
       "type": "integer",
       "maximum": 20,
       "minimum": 1
      },
      "polymarket_limit": {
       "type": "integer",
       "maximum": 1000,
       "minimum": 100
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "query": "bitcoin",
  "source": [
   "Polymarket Gamma API",
   "Kalshi public Trade API"
  ],
  "opportunities": [],
  "candidate_matches": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agenttoll-cross-platform-prediction-market-scanner-78d51ac8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tollbooth.memerhuwhite.workers.dev](https://www.zero.xyz/host/tollbooth.memerhuwhite.workers.dev/llms.txt)