Polymarket Market & Order Book

Name: Polymarket Market & Order Book
Price: 0.003 USDC
Availability: InStock

One Polymarket market by slug, id or URL: question, rules, outcome probabilities, best bid/ask, last trade, 1-day change, volume, liquidity and the order book (top bids and asks with sizes and spread) for each outcome. An event slug returns all its markets. Use before placing a trade or to quote exact odds.

SearchLiveeip155:8453Exactvia cdp

https://bess-x402.onrender.com/v1/predictions/polymarket/market

Prediction-marketsPolymarketOrder-bookOdds

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.

$1.55

Verified settled volume

420 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0030

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-23 10:41Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x1129A6BB9C6165FF07fdC509c107B522CA0e1871

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.003USDC≈ $0.003 USD

on Base · exact scheme

Pay 0.003 USDC on Base to 0x1129…e1871. The signed payment is good for 5 minutes.

Paid to: 0x1129…e1871
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 3000 smallest units

3000units

on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0x1129…e1871
Token contract: 0x3c49…c3359
Payment window: 5 minutes

3000units

on Arbitrum · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0x1129…e1871
Token contract: 0xaf88…e5831
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
    "amount": "3000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "depth": 3,
          "market": "will-bitcoin-reach-90000-by-december-31-2026-113-862-581-343"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "id": "1345531",
          "url": "https://polymarket.com/market/will-bitcoin-reach-90000-by-december-31-2026-113-862-581-343",
          "slug": "will-bitcoin-reach-90000-by-december-31-2026-113-862-581-343",
          "type": "market",
          "active": true,
          "closed": false,
          "source": "polymarket",
          "best_ask": 0.61,
          "best_bid": 0.6,
          "end_date": "2027-01-01T05:00:00Z",
          "outcomes": [
            {
              "name": "Yes",
              "order_book": {
                "asks": [
                  {
                    "size": 6560,
                    "price": 0.61
                  },
                  {
                    "size": 13908,
                    "price": 0.62
                  }
                ],
                "bids": [
                  {
                    "size": 205,
                    "price": 0.6
                  },
                  {
                    "size": 205,
                    "price": 0.59
                  }
                ],
                "spread": 0.01
              },
              "probability": 0.605
            },
            {
              "name": "No",
              "order_book": {
                "asks": [
                  {
                    "size": 205,
                    "price": 0.4
                  },
                  {
                    "size": 205,
                    "price": 0.41
                  }
                ],
                "bids": [
                  {
                    "size": 6560,
                    "price": 0.39
                  },
                  {
                    "size": 13908,
                    "price": 0.38
                  }
                ],
                "spread": 0.01
              },
              "probability": 0.395
            }
          ],
          "question": "Will Bitcoin reach $90,000 by December 31, 2026?",
          "change_1d": 0.04,
          "token_ids": [
            "89384721767526056909881321094852287855436067743554155484781205764118128944311",
            "89935193776001764234914810530894985625350942201527563326613427606200761992090"
          ],
          "group_item": "↑ 90,000",
          "volume_usd": 2488154.1949,
          "description": "This market will immediately resolve to \"Yes\" if any Binance 1 minute candle for Bitcoin (BTC/USDT) between the creation of this market and December 31, 2026, 23:59 in the ET timezone has a final \"High\" price equal to or greater than the price specified in the title. Otherwise, this market will reso...",
          "liquidity_usd": 89635.0642,
          "volume_24h_usd": 25594.6052,
          "last_trade_price": 0.61
        }
      }
    },
    "schema": {
      "type": "object",
      "$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",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "market"
              ],
              "properties": {
                "depth": {
                  "type": "integer",
                  "description": "Order book levels per side (1-20)"
                },
                "market": {
                  "type": "string",
                  "description": "Market slug, numeric id or polymarket.com URL"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-23 10:41Z
Last indexed by Roundhouse: 2026-10-26 20:10Z
Last enriched (probe, favicon, geo): 2026-10-22 13:16Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service Polymarket Market & Order Book and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Polymarket%20Market%20%26%20Order%20Book'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://bess-x402.onrender.com/v1/predictions/polymarket/market, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.