# Polymarket Get midpoint price API

> Retrieves the midpoint price for a specific token ID. The midpoint is calculated as the average of the best bid and best ask prices.

Source: https://www.sandbase.ai/model/polymarket/midpoint
API reference: https://www.sandbase.ai/model/polymarket/midpoint/docs

## Facts

- Provider: Polymarket
- Type: Data API
- Endpoint: `POST https://api.sandbase.ai/v1/api/polymarket/midpoint`
- Price: $0.02 per call
- Capabilities: api, polymarket, prediction markets
- Billing: pay per use from one SandBase balance; no provider account or subscription needed

## Call it

`POST https://api.sandbase.ai/v1/api/polymarket/midpoint` with `Authorization: Bearer $SANDBASE_API_KEY` and the parameters as a JSON body.

| Parameter | Type | Required | Allowed values |
| --- | --- | --- | --- |
| `token_id` | string | yes |  |

## FAQ

### How do I use the Polymarket Get midpoint price API?

Send a POST request to https://api.sandbase.ai/v1/api/polymarket/midpoint with your SandBase API key in the Authorization header (Bearer) and the parameters as a JSON body. You can also try it in the Playground on this page without writing code.

### How much does the Polymarket Get midpoint price API cost?

$0.02 per call, billed from your SandBase balance. You are only charged for calls you make; there is no subscription.

### What parameters does the Polymarket Get midpoint price API accept?

Required: token_id (string). The Parameters table and the Playground on this page list every field.

### What does the Polymarket Get midpoint price API return?

A JSON response returned in the same HTTP request (synchronous).

### Do I need a Polymarket developer account or API key?

No. Polymarket Get midpoint price runs through SandBase, so one SandBase API key covers this endpoint and every other API and model in the catalog. You do not need to apply for Polymarket API access separately.

## README

### Polymarket Get midpoint price API

Retrieves the midpoint price for a specific token ID. The midpoint is calculated as the average of the best bid and best ask prices.

The response is the official Polymarket API response, unchanged.

#### Request

```bash
curl -X POST "https://api.sandbase.ai/v1/run" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "polymarket/midpoint", "token_id": "0xabc123def456..."}'
```

#### Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `token_id` | string | Yes | Token ID (asset ID) |

#### Pricing

Flat price per call. Failed calls are not charged.