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Every market on Intention has a tick size (smallest allowed price increment) and a lot size (smallest allowed quantity increment). Orders that violate these constraints are rejected by the protocol. This page will document the API-level rules for tick and lot — how they are exposed in market metadata, how clients should round, and how rejection codes are structured.
Status: not yet published. The tick and lot rules described in Precision and Markets define the behavior; this API page will be filled in once the read endpoints exposing them are stable.

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What this page will contain

  • Discovery. How clients fetch tick and lot for each market via the read API.
  • Rounding rules. Which fields round against the user, which round to nearest, and how rounding interacts with reduce-only sizing.
  • Validation. The error codes returned when an order violates tick or lot constraints, cross-referenced with errors.
  • Worked examples. Sample order sizes and prices for representative markets, showing the exact rounded values that the matching engine accepts.
See Precision for the policy view and Notation for the underlying field types. For early integration questions, email contact@intention.xyz.