# Polymarket Sampling Markets

> Polymarket Sampling Markets is a paid API for AI agents from AIsa MPP Data APIs at api.aisa.one, paid per call via MPP, $0.012/call, status unknown (last checked 2026-10-18).

Returns a paginated list of Polymarket prediction markets with rich metadata including token prices, outcomes, tags, and liquidity reward details.

## Facts

- Endpoint: GET https://api.aisa.one/apis/v1/polymarket/sampling-markets?utm_source=zero.xyz
- Price: $0.012/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Provider: AIsa MPP Data APIs
- Website: https://aisa.one
- Tags: web-search, financial-data, prediction-markets, weather, travel, data, search
- Canonical page: https://www.zero.xyz/c/aisa-mpp-data-apis-polymarket-sampling-markets-de244d18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OmxvaNTzKhVMJVq9fymIZ

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 aisa-mpp-data-apis-polymarket-sampling-markets-de244d18
```

Example prompt: Can you pull up the latest sampling markets from Polymarket — I want to see what's currently available with their outcome prices, tags, and descriptions?

## When to prefer this

Use this endpoint when you need enriched Polymarket market listings with token price summaries, descriptive metadata, and tags — particularly useful for discovery and browsing use cases. Prefer this over raw Polymarket API access when you want pay-per-request simplicity without managing Polymarket authentication or rate limits.

## Known failure modes

- Invalid or expired next_cursor returns empty results or an error
- Network timeout if Polymarket's underlying data is slow
- Empty data array if no sampling markets are currently available
- Malformed cursor parameter causing a 400 bad request

## How this service works

Returns sampling markets with richer descriptive metadata, token summaries, and tags.

<!-- aisa-pricing:start -->
Published reference price: $0.012 USD per successful request. Account-specific pricing and final settlement may differ.
<!-- aisa-pricing:end -->

## Output

A paginated array of prediction market objects, each containing the market question, description, outcome tokens with prices and winner flags, tags, icon, image, active/closed/archived status, end date, condition ID, FPMM address, maker/taker fees, minimum order/tick sizes, reward rates, and a next_cursor for pagination.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "next_cursor": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "fpmm": {
      "type": "string"
     },
     "icon": {
      "type": "string"
     },
     "tags": {
      "type": "array",
      "items": {
       "type": "string"
      }
     },
     "image": {
      "type": "string"
     },
     "active": {
      "type": "boolean"
     },
     "closed": {
      "type": "boolean"
     },
     "tokens": {
      "type": "array",
      "items": {
       "type": "object",
       "properties": {
        "price": {
         "type": "number",
         "format": "double"
        },
        "winner": {
         "type": "boolean"
        },
        "outcome": {
         "type": "string"
        },
        "token_id": {
         "type": "string"
        }
       }
      }
     },
     "rewards": {
      "type": "object",
      "properties": {
       "rates": {
        "type": "array",
        "items": {
         "type": "object",
         "properties": {
          "asset_address": {
           "type": "string"
          },
          "rewards_daily_rate": {
           "type": "number",
           "format": "double"
          }
         }
        }
       },
       "min_size": {
        "type": "number",
        "format": "double"
       },
       "max_spread": {
        "type": "number",
        "format": "double"
       }
      }
     },
     "archived": {
      "type": "boolean"
     },
     "neg_risk": {
      "type": "boolean"
     },
     "question": {
      "type": "string"
     },
     "description": {
      "type": "string"
     },
     "market_slug": {
      "type": "string"
     },
     "question_id": {
      "type": "string"
     },
     "condition_id": {
      "type": "string"
     },
     "end_date_iso": {
      "type": "string",
      "format": "date-time"
     },
     "seconds_delay": {
      "type": "integer"
     },
     "maker_base_fee": {
      "type": "integer",
      "format": "int64"
     },
     "taker_base_fee": {
      "type": "integer",
      "format": "int64"
     },
     "game_start_time": {
      "type": "string",
      "format": "date-time"
     },
     "accepting_orders": {
      "type": "boolean"
     },
     "is_50_50_outcome": {
      "type": "boolean"
     },
     "enable_order_book": {
      "type": "boolean"
     },
     "minimum_tick_size": {
      "type": "number",
      "format": "double"
     },
     "minimum_order_size": {
      "type": "number",
      "format"
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aisa-mpp-data-apis-polymarket-sampling-markets-de244d18/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.aisa.one](https://www.zero.xyz/host/api.aisa.one/llms.txt)