Minswap uses a GraphQL endpoint that you can find here:
Example:
curl --request POST \
--url https://monorepo-mainnet-prod.minswap.org/graphql/ \
--header 'Content-Type: application/json' \
--data '{"query":"query TVLSeries { tvlSeries { time tvl }}\n\n","operationName":"TVLSeries"}'
They also have an adapter to query their data using Blockfrost:
SundaeSwap has an API located at:
Example:
curl --request GET \
--url https://stats.sundaeswap.finance/api/ticks/0029cb7c88c7567b63d1a512c0ed626aa169688ec980730c0473b913.70202d01/2022/09/02
Both of them don't seem to have public documentation, so you can either ask the team directly or try to find the endpoints you need.
Hope this helps!