Transaction Builder API

Base URL: https://builder.snek.fun The Transaction Builder API produces Snekfun transactions as CBOR and also exposes helper endpoints to sign or submit them. When a Turbo Wallet session is available, the same service can also attach the server-side witness and submit the transaction for you. Auth: Public

Protocol parameters

Protocol fees and limits are served from the same host — see GET /parameters.

Use /order as the trade-building endpoint. It routes to the correct execution path internally, so you do not need to call a separate /trade route from this docs set.

What you can build

Action	Endpoint
Buy or sell order	`/order`
Cancel a pending order	`/cancel`
Launch a new token	`/launch`
Create a vesting lock	`/create-lock`
Withdraw a vesting lock	`/withdraw-lock`

Sign & submit

Action	Endpoint
Sign (no submit)	`/sign`
Submit pre-signed CBOR	`/submit`
Sign and submit	`/sign-and-submit`

Builder inputs

Most build endpoints take a utxos field. See UTxO input modes for the difference between "splash-wallet" and string[].

Overview

Analytics

Config