# Arkham Polymarket Event Lookup

> Arkham Polymarket Event Lookup is a paid API for AI agents from api.arkm.com, paid per call via x402, $0.2/call, status unknown (last checked 2026-09-14).

Retrieves Arkham-enriched data for a specific Polymarket prediction market event

## Facts

- Endpoint: POST https://api.arkm.com/x402/polymarket/event
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arkham-polymarket-event-lookup-f679ab9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yiFoy5FXwFFHPO8gN-t8h

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 arkham-polymarket-event-lookup-f679ab9b -d '<json body>'
```

Example prompt: Pull up the Arkham Polymarket event data for the 2024 US presidential election market — I want to see the event details, outcomes, and any available trading stats.

## When to prefer this

Use this endpoint when you need Arkham-enriched intelligence on a specific Polymarket prediction market event — particularly when you want onchain entity labeling, address-level insights, or Arkham's proprietary intelligence layered on top of raw Polymarket data. Prefer this over direct Polymarket APIs when the goal is understanding who is behind market activity or correlating prediction market data with onchain flows.

## Known failure modes

- Invalid or unknown event ID/slug returns an error or empty result
- Network timeout or API unavailability returns a 5xx error
- Incorrect authentication or missing x402 payment header returns a 401/402 error
- Malformed request body returns a 400 bad request error
- Event exists on Polymarket but has no Arkham enrichment data available

## How this service works

Get an Arkham Polymarket event. $0.20 per call.

## Output

Returns structured data about a specific Polymarket prediction market event as enriched by Arkham Intelligence, including event metadata, outcome options, market statistics such as volume and liquidity, and potentially onchain entity/address labels linked to market activity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "eventId": {
   "anyOf": [
    {
     "type": "string"
    },
    {
     "type": "number"
    },
    {
     "type": "boolean"
    },
    {
     "type": "array",
     "items": {
      "anyOf": [
       {
        "type": "string"
       },
       {
        "type": "number"
       },
       {
        "type": "boolean"
       }
      ]
     }
    }
   ],
   "description": "Required. Polymarket event ID."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arkham-polymarket-event-lookup-f679ab9b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.arkm.com](https://www.zero.xyz/host/api.arkm.com/llms.txt)