All the labels list 1 fluid ounce (30g) as having .1g of dietary fiber. My five daily cups report 5.6g (versus 4.1g for 1/2 cup oatmeal). Thinking this implausible I checked the USDA food composition database. The report shows 100g of brewed coffee yields 0.0g.
The adult RDA ranges from 21g to 38g depending on age and gender so 5.6g is material. https://ndb.nal.usda.gov/ndb/foods/show/4277?manu=&fgcd=&ds=