POST/quote

Get a quote

Base URL: https://bridge.polymarket.com
Auth: Public, no key
Rate limit: 50 req / 10s (5 per second)
Limit applies to: Bridge API general

Request body

Field	Type	Required	Description
fromAmountBaseUnit	string	yes	Amount of tokens to send
fromChainId	string	yes	Source Chain ID
fromTokenAddress	string	yes	Source token address
recipientAddress	string	yes	Address of the recipient
toChainId	string	yes	Destination Chain ID
toTokenAddress	string	yes	Destination token address

Example

curl -X POST "https://bridge.polymarket.com/quote" \
  -H "Content-Type: application/json" \
  -d '{
  "fromAmountBaseUnit": "<fromAmountBaseUnit>",
  "fromChainId": "<fromChainId>",
  "fromTokenAddress": "<fromTokenAddress>",
  "recipientAddress": "<recipientAddress>",
  "toChainId": "<toChainId>",
  "toTokenAddress": "<toTokenAddress>"
}'

Response fields

Field	Type	Description
estCheckoutTimeMs	integer	Estimated time to complete the checkout in milliseconds
estFeeBreakdown	object	Breakdown of the estimated fees
estInputUsd	number	Estimated token amount received in USD
estOutputUsd	number	Estimated token amount sent in USD
estToTokenBaseUnit	string	Estimated token amount received
quoteId	string	Unique quote id of the request

Responses

Status	Meaning
200	Quote retrieved successfully
400	Bad Request - Missing required field
500	Server Error

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.