Index onlineMerchant portal
Api Endpoint

Prediction market book

Prediction market book. Get the highest 24h-volume Polymarket and Kalshi markets, each with volume, bid, and ask. Pass ?q= to keep markets that share a word, or omit q for the liquid board. $0.01 USDC. Included in the hour pass. Includes a signed Ed25519 receipt you can check with the published key.

Open interactive test console

Offering

Provider
aizamon.com
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Other
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://aizamon.com/x402/v1/book
MIME type
application/json
First seen
2026-10-27T21:36:21.577Z
Last seen
Tags
prediction market, order book, polymarket, X402, book, kalshi, volume, Liquidity, under-cap

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0xB88544cF8E9E97EEb2F313e0D3528FC1e50C2887"
  }
]

Observed health

Status
Healthy
Latest latency
305 ms
Average latency
194 ms
HTTP status
402
Last checked
Reachability
100% over 3 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "q": {
          "type": "string",
          "description": "Optional topic. Omit for the highest 24h-volume markets."
        }
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object",
      "properties": {
        "ok": {
          "type": "boolean"
        },
        "protocol": {
          "type": "string"
        },
        "sku": {
          "type": "string"
        },
        "result": {
          "type": "object"
        }
      }
    }
  },
  "required": [
    "type"
  ]
}