Changing attitudes of nonplayer characters

[Dansun]

Is there any information regarding attitudes of nonplayer characters other than whats in the Diplomacy skill text?

[url=http://paizo.com/pathfinderRPG/prd/skills/diplomacy.html#_diplomacy[/url]

Is there a list of actions or requests that an NPC is willing to do at each level of attitude?

For every 5 by which your check result exceeds the DC, the character's attitude toward you increases by one additional step.

Hostile 25 + creature's Cha modifier
Unfriendly 20 + creature's Cha modifier
Indifferent 15 + creature's Cha modifier
Friendly 10 + creature's Cha modifier
Helpful 0 + creature's Cha modifier

So if I use the Charm Person spell to get him to a friendly attitude, then Diplomacy to bump the NPC's attitude up 2 levels to Helpful+, what limits on helpfulness does he have?

[Stubs McKenzie]

There is not a list as such that I am aware of, simply because there are too many variables within any given situation to determine what a NPC will or wont do. Up to you.

[Mort the Cleverly Named]

Are you looking for something beyond the "Requests" chart under Diplomacy? Circumstance is going to dictate what category a given request falls into, so it is always going to end up being a GM call.