Building permits in Missouri
2 jurisdictions, each with the department that issues, its portal and its phone number. Cities issue their own permits; counties cover unincorporated areas, which is the distinction that sends most contractors to the wrong office.
2 checked against the department's own page
Licensing
No statewide general-contractor license — GC licensing is handled locally by each city/county (Kansas City, St. Louis, Springfield, etc.); only the electrical contractor license is statewide.
No statewide GC license (local licensing); Missouri Division of Professional Registration (electrical)