POST/midpoints

Get midpoint prices (request body)

Retrieves midpoint prices for multiple token IDs using a request body. 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: 500 req / 10s (50 per second)
Limit applies to: /midpoints

Request body

Field	Type	Required	Description
token_id	string	yes	Token ID (asset ID)
side	string	no	Order side (optional, not used for midpoint calculation)

Example

curl -X POST "https://clob.polymarket.com/midpoints" \
  -H "Content-Type: application/json" \
  -d '[
  {
    "token_id": "<token_id>"
  }
]'

Responses

Status	Meaning
200	Successfully retrieved midpoint prices
400	Bad request - Invalid payload
500	Internal server error

Errors this endpoint returns

Related endpoints

GET /midpoint CLOB API
GET /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.