Attorney General Maura Healey promised to “vigorously oppose” a Texas judge’s order for her to testify in a deposition relating to her office’s probe of Exxon Mobil’s climate change policy and said she has no plans to visit the Lone Star State for the Dec. 13 hearing.

“Our position in this ligation is that the authorities in Texas, and specifically the federal court down there, has no jurisdiction over state attorneys general and the work of their offices,” Healey told reporters today at the State House. “It’s been disappointing to see Exxon fight the request for basic information. Our job as attorneys general is to be able to ask questions.”

Healey launched her probe of Exxon Mobil’s research in April, arguing the oil giant was deceiving consumers and investors. Exxon Mobil filed for an injunction — which Healey’s lawyers have moved to dismiss — to stop her on First Amendment and other grounds.

Judge Ed Kinkeade late last week ordered Healey, along with New York AG Eric Schneiderman to answer questions in a Dallas courtroom deposition Dec. 13.

“We are vigorously opposing any order to testify or produce discovery,” Healey said. “We believe we are on strong legal ground, not only with respect to the questions that we asked, but also to the position that this court has no jurisdiction over us.

“In simple terms, what the court has done is inappropriate,” the AG added.

Asked whether Healey has plans to travel to Texas for the deposition, she replied, “No, I don’t and we will take it up on appeal.”

Kinkeade has noted Exxon Mobil has charged Healey with attempting “to satisfy a political agenda” and said in his order he wants to know more about what is behind her probe before he finds for either side.

Asked whether the investigation is politically motivated, Healey, a Democrat, said, “that couldn’t be further from the truth. This was about gather information. Our job as an attorney general’s office is to make sure we are asking questions as appropriate.”

Healey said she did not expect Exxon, which has sued her office both in Texas and in Massachusetts and lobbied a Texas congressman on the congressional committee on science and technology to convene hearings against the AG’s probe, to be so strongly opposed to the inquiry.

“We were surprised to see Exxon fight this so vigorously from the outset and that has taken many different forms,” Healey said, detailing the two lawsuits and congressional lobbying efforts. “To me it’s disturbing because one thing you don’t want, you don’t want to see interference with an investigation, you don’t want to see influence with an investigation. We will go wherever the facts take us but, at a minimum, we are entitled to receive information and, at a minimum, I hope that’s what the court will decide in our favor.”

First Amendment Attorney Harvey Silverglate told the Herald yesterday that Healey could try to appeal being deposed, but doesn’t think she’d win. Still, he said, Kinkeade’s order is so unusual a higher court would likely hear her objections.