Project Gumball for ChatGPT
com.gumballtools/platform
One MCP server exposing every tool in the Gumball portfolio.
client:ChatGPT
transport:streamable-http
tools:25
Install Project Gumball in ChatGPT
Settings → Connectors → Advanced → Developer mode
https://gumballtools.com/api/mcpCustom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs
What ChatGPT can do once it is connected
- cron_explain
- cron_build
- cron_next_runs
- json_to_types
- regex_explain
- timezone_convert
- color_analyse
- vocab_draw
- vocab_check
- body_metrics
- due_date
- round_cash_total
- rounding_impact
- price_band
- offside
- offside_rule_contrast
- check_digit_run
- amortize_schedule
- iso_week_run
- validate_json
- validate_yaml
- validate_xml
- validate_csv
- validate_auto