GET/midpoint

Get midpoint price

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

Base URL: https://clob.polymarket.com
Auth: Public, no key
Rate limit: 1,500 req / 10s (150 per second)
Limit applies to: /midpoint

Things to know

There is a batch version at /midpoints. It has a lower request limit but covers many tokens per call, so it is cheaper per token than looping this one.

Parameters

Name	In	Type	Required	Description
token_id	query	string	yes	Token ID (asset ID)

Example

curl -X GET "https://clob.polymarket.com/midpoint?token_id=<token_id>"

Response fields

Field	Type	Description
mid_price	string	Midpoint price as a string

Responses

Status	Meaning
200	Successfully retrieved midpoint price
400	Bad request - Invalid token id
404	Not found - No orderbook exists for the requested token id

Errors this endpoint returns

Related endpoints

GET /midpoints CLOB API
POST /midpoints CLOB API

Polymarket's API serves current state only, so it cannot show what a market's book looked like after it resolved. PolyTest records Up/Down markets while they run and keeps the snapshots. Try it free, or read the full rate limit reference.

From Polymarket's published OpenAPI spec and rate-limit tables, synced 2026-10-04.