Polymarket: Get Midpoint

Get the current midpoint price of a prediction market outcome, which is its implied probability.

Tool ID: polymarket_get_midpoint

Run this action

Use the TypeScript SDK for one call. Use ctx.tools.execute(...) inside a Play for durable calls, scheduled calls, or CSV processing.

import { Deepline } from 'deepline';

const deepline = await Deepline.connect();
const result = await deepline.tools.execute(
  'polymarket_get_midpoint',
  {
    "token_id": "token_123"
  },
);

console.log(result.toolResponse.raw);

CLI

deepline tools execute polymarket_get_midpoint --input '{
  "token_id": "token_123"
}' --json

Example response

The SDK returns this shape at result.toolResponse.raw. The example values illustrate the response.

{
  "data": {
    "mid": "example"
  }
}

Use deepline describe polymarket_get_midpoint --json for the latest machine-readable contract.

Input reference

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

Name	Type	Required	Default	Details
`payload.token_id`	`string`	Yes	—	Token ID (asset ID)

Output reference

Standard tool result payload.

Name	Type	Required	Default	Details
`result.data`	`object`	Yes	—	Provider response payload.
`result.data.mid`	`string`	Yes	—	Midpoint price as a decimal string, 0 to 1.
`result.meta`	`object`	No	—	Additional response metadata (status, paging).

Deepline cost

Pricing model: fixed (per call).
Estimated Deepline credits: 0 per pricing unit.
Provider-native pricing may still exist outside Deepline credit billing.

​Run this action

​CLI

​Example response

​Input reference

​Output reference

​Deepline cost

​Related documentation

Run this action

CLI

Example response

Input reference

Output reference

Deepline cost

Related documentation