Market creation
Market Builder
Describe the market you want to launch. Linesetter drafts the structure and resolution rules, then recommends settlement sources based on how comparable live markets actually resolve.
Market type
Settlement readiness
73/100Comparable markets mix free and paid sources. Free fallbacks usually exist for cross-checking.
market.spec.json
Karen Bass wins LA mayor
- Structure
- Binary (Yes/No) · mutually-exclusive candidate set
- Resolution window
- Resolves on certified results (T+days)
- Settlement rule
- If Karen Bass wins LA mayor is certified as the winner by the relevant Secretary of State or county election authority, the market resolves Yes. Otherwise No.
Suggested settlement sources
Republican Party
68 marketsFree
Democratic Party
56 marketsFree
The New York Times
22 marketsFreemium
Reuters
21 marketsFree
Ranked by how often comparable live markets settled on each source.
Tested templates
Rules are drafted from templates validated against real settled markets in each category.
Precedent-ranked sources
Source suggestions are ranked by how often live markets settled on them, not guesswork.
Readiness up front
See whether a market type settles cleanly on free data before you commit to launching it.