Shane Casley, of Elite Sports Properties, told AFL.com.au that Harvey, 36, wanted to play on next season provided his outstanding form and fitness held up for the rest of 2014.
Click here for more contract and free agency news
"The early indications from 'Boomer' (Harvey) are that he's happy with the way the season is panning out, so if things keep going well over the next couple of weeks, I'm sure we'll sit down with North and talk about next year," Casley said.
"I reckon his form is probably as good as it's been for the last six or seven years.
"And as the other North boys step up it probably releases Boomer a little bit more too, gives him a little bit more freedom than he's had in the last 15 years, and he'll probably be revelling in that.
"So provided his form and body stand up, I think he would like to play on, but that will probably pan out over the next couple of weeks."
North football director Geoff Walsh told AFL.com.au the Roos had no set timeframe in which they planned to open talks with Harvey.
But Walsh said in recent seasons North had typically opened contract talks with Harvey, who has played on a year-by-year basis since entering his 30s, around this time of the year.
Walsh also said Harvey's standing in the game, longevity and current form meant that if he wanted to play on it would take a "brave man" to tell him no.
This year, Harvey has climbed to seventh on the AFL's all-time games list, playing his 373rd game last Sunday night against Richmond.
But the superstar veteran has shown no signs of slowing down this season, playing every game and averaging 25.9 possessions and 1.4 goals a match to move to fifth in the Official AFL Player Ratings.
Against Richmond, Harvey was again one of the Roos' match-winners, finishing with 25 possessions, three goals and a game-high four goal assists.
The four-time All Australian is also tied with midfielder Ben Cunnington as North's leading vote-getter (33) in this year's AFL Coaches' Association Champion Player of the Year award.
Harvey has been remarkably durable throughout his career and has not missed a game through injury since returning from a dislocated elbow in round 13, 2009.
The former Roos skipper has won a record five North best and fairest awards and should be among the leaders in this year's count after the first 12 rounds.
Twitter: @AFL_Nick.
