When Anthropic launched its legal plugin on 3 February, public markets interpreted it as an existential threat to legal software vendors. Yesterday’s (24 February) announcements show what adaptation looks like. Harvey is plugging into Claude to expand its reach as enterprise users consolidate around foundation model platforms, while LexisNexis is absorbing the same technology inside Protégé to reinforce its data and infrastructure dominance.
Harvey is funded by OpenAI but has long been a partner of Anthropic’s. Speaking to Legal IT Insider at Harvey’s inaugural London conference yesterday, CEO and co-founder Winston Weinberg said: “We integrate with everything they release but today’s announcement about their MCP program means easier access to Harvey. Enterprises generally will adopt Anthropic so this is another access point to Harvey.”
Harvey said in a statement on social media: “The possibilities in agentic AI are just getting started, and Harvey is honored to be part of the announcement and to bring Claude connection functionality to our customers.”
The connector means a Claude user can invoke Harvey’s legal workflows from inside Claude and get a result back in the same thread. Claude is the orchestrator, providing multi-step agentic workflows, with Harvey supplying the domain-specific legal capability.
Whereas Harvey is a startup trying to maximise its reach, LexisNexis is trying to defend its infrastructure dominance – and this will be regarded as a smart move. The integration means that you can use Anthropic’s legal model capabilities but the output is grounded in LexisNexis’ data. The plugin will likely enhance Protege’s agentic capabilities but means that the centre of gravity remains its data and infrastructure.
In a statement yesterday, Lexis said that the company has been evaluating the legal plugin capabilities since before its market release. The new integration “enhances hundreds of existing AI and agentic AI legal workflow capabilities available via Protégé and is part of the company’s process to continuously evaluate and incorporate new technologies or capabilities that help customers achieve better outcomes in trusted LexisNexis solutions.”
In a product testing forum last week, an AmLaw 100 third-year associate noted, with perhaps a degree of hyperbole, that the new legal plugin embedded in Protégé “will take me from prompt to finished work product much faster and better visually that I can do it. It’s like going from driving a horse and buggy to driving a Maserati. I could not have imagined it being this powerful.”
More to come on those integrations and their significance. They follow an announcement from Intapp yesterday that it will build industry-specific agents powered by Anthropic’s large language model Claude. These agents will complement Claude with industry-specific workflows, best practice playbooks, and information governance to meet the needs and regulatory requirements of professional firms. You can read about that here: https://legaltechnology.com/2026/02/24/intapp-collaborates-with-anthropic-to-build-industry-specific-agents/
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