# Polymarket Last Trade Price

> Polymarket Last Trade Price 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).

Retrieves the most recent trade price and direction (BUY/SELL) for a specific Polymarket prediction market token.

## Facts

- Endpoint: GET https://api.aisa.one/apis/v1/polymarket/last-trade-price?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-last-trade-price-f700a6a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wxpkZH3Pq2IaIcv48s7--

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-last-trade-price-f700a6a0
```

Example prompt: What was the last trade price and direction for Polymarket token ID 71321663317589786004865993038383591473965197774834854936956222814818618945297?

## When to prefer this

Use this endpoint when you need to know the most recently executed trade price for a specific Polymarket token, especially to gauge recent market activity or last-seen price level. Prefer this over the midpoint or best bid/ask endpoints when you want actual transaction history rather than current order book state.

## Known failure modes

- Token ID not found or invalid — returns default price of 0.5 and empty side string
- No trades have occurred for the token — returns default values (0.5 price, empty side) rather than an error
- Malformed or missing token_id parameter — likely returns a 400 bad request error
- Network or service unavailability — may return 5xx errors

## How this service works

Retrieves the last trade price and side for a specific token ID. Returns default values of 0.5 for price and empty string for side if no trades found.

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

## Output

Returns a JSON object with two fields: 'price' (a string representing the last trade price, defaulting to '0.5' if no trades exist) and 'side' (a string enum of 'BUY', 'SELL', or empty string if no trades found).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "token_id"
 ],
 "properties": {
  "token_id": {
   "type": "string",
   "description": "Token ID (asset ID)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "price",
  "side"
 ],
 "properties": {
  "side": {
   "enum": [
    "BUY",
    "SELL",
    ""
   ],
   "type": "string",
   "example": "BUY",
   "description": "Last trade side (BUY or SELL)"
  },
  "price": {
   "type": "string",
   "example": "0.45",
   "description": "Last trade price"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aisa-mpp-data-apis-polymarket-last-trade-price-f700a6a0/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)