bullpen polymarket preview

Last updated: July 13, 2026

Preview a trade: estimated fill price, fees, slippage, and total cost without executing

Usage

bullpen polymarket preview [OPTIONS] <SLUG> <OUTCOME> <AMOUNT>

Live Help

Preview a trade: estimated fill price, fees, slippage, and total cost without executing

Usage: bullpen polymarket preview [OPTIONS] <SLUG> <OUTCOME> <AMOUNT>

Arguments:
  <SLUG>
          Active market slug from `bullpen polymarket search`

  <OUTCOME>
          Outcome name exactly as shown by market data

  <AMOUNT>
          Trade amount — USD for buy (e.g., "100"), shares for sell (e.g., "237.2")

Options:
      --output <OUTPUT>
          Output format for command results

          [possible values: table, json]

      --side <SIDE>
          Trade side: buy (default) or sell

          [default: buy]

      --env <ENV>
          Target environment to connect to (overrides config.toml)

          [env: BULLPEN_ENV=]
          [possible values: staging, production]

      --config <CONFIG>
          Path to a custom config.toml file (overrides $BULLPEN_CONFIG and the default location).

          Explicit --config and BULLPEN_CONFIG paths fail closed: if the file is missing, the CLI exits validation instead of silently loading defaults. Credentials still resolve via BULLPEN_HOME, so set BULLPEN_HOME too when isolating a session.

      --read-only
          Enable read-only mode: blocks all mutating commands

      --non-interactive
          Suppress interactive prompts; does NOT imply --yes for money-moving commands

          [env: BULLPEN_NON_INTERACTIVE=]

  -h, --help
          Print help (see a summary with '-h')

EXAMPLES:
  # Preview a buy without signing or submitting
  bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 Yes 10

  # Preview a sell by share amount
  bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 Yes 10 --side sell

  # Export the preview estimate as JSON
  bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 Yes 10 --output json

Example Commands

bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 Yes 10
bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 Yes 10 --side sell
bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 Yes 10 --output json
bullpen polymarket preview will-ronaldo-cry-at-the-world-cup-20260604013616610 No 10 --output json

JSON Output

Contract: JSON Output Contract.

This command supports --output json, but this generated reference page intentionally does not include a synthetic success schema or example.

Use the live command in your target environment to inspect command-specific success fields. Error output follows the shared JSON output contract linked above.

Schema version: 1 when a command emits schema_version; otherwise treat the current command shape as contract version 1.

Stability

Patch releases may add nullable or optional fields. Minor releases may add required fields or increment schema_version. Major releases may remove or rename fields.