magic the gathering rules do tokens have a converted mana cost

[TrophyQ]

do tokens have converted mana cost in magic

[Twanos]

sometimes... I know that sounds like a cop out but it's true... Here's why.

If something puts a token into play such as Luminarch Ascension or Dragon Fodder the card says put a x/x color type into play. It doesn't say a casting cost so in this case the token doesn't have one. (See the excerpt from rule 110.5)

If something puts a token into play that is a copy of a permanent then as copies everything it also copies the mana cost and thus will have the same cost as the original. (See the excerpt from rule 706.2)

110.5b - ... A token doesn't have any characteristics not defined by the spell or ability that created it. [CompRules 2009/07/08]
Example: Sprout is an instant that says "Put a 1/1 green Saproling creature token onto the battlefield." The resulting token has no mana cost, supertype, expansion symbol, rules text, or abilities. [CompRules 2009/07/08]

706.2 - ...The "copiable values" are the values derived from the text printed on the object (that text being name, mana cost, card type, subtype, supertype, expansion symbol, rules text, power, toughness, and/or loyalty)...

[Arix]

To be a bit pedantic, every token has a converted mana cost. Tokens like those put into play by Luminarch Ascension and Dragon Fodder have no mana cost, but they have a converted mana cost of 0, same as the Time Spiral suspend cycle and lands.