How Fermat made Claude the company's super app with Speakeasy

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Fermat

AI

MCP Platform

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Speakeasy

Fermat  is an AI-powered commerce platform that helps brands create personalized shopping experiences across every channel. Backed by $45M in Series B funding from Greylock and QED Investors, Fermat is redefining how brands convert customers online.

But this isn’t a story about what Fermat builds for its customers. It’s a story about how Fermat made Claude the operating system for the entire company, and how Speakeasy made that possible.

The decision to go AI-native

Every company will become AI-native. The question isn’t if, it’s when, and the companies that move fastest will benefit the most.

For Fermat, the moment arrived in January 2026 at a leadership offsite. The team was debating whether to invest engineering resources in a project for the GTM team. While the team was discussing, Fermat co-founder Shreyas Kumar spun up a team of Claude agents and completed the project in about an hour. The debate ended and a new one started, how could Fermat transform into an AI-native company with Claude as the daily driver for every employee. Not just engineering. Everyone.

Making Claude the operating system

Making a company-wide decision is one thing. Actually making Claude the central way people interact with every tool and service is another challenge entirely.

Like every company, Fermat’s source of truth is distributed across a mix of its own internal APIs and SaaS products: Salesforce, Rippling, etc. To make Claude the daily driver, all of these services needed to be connected to Claude. Every team member needed access. Permissions needed to be managed safely. And leadership needed visibility into whether adoption was actually happening.

This is where Speakeasy became essential. The Speakeasy MCP Platform made it easy to connect the full mix of SaaS tools and internal APIs to Claude, giving every team member the ability to work through a single interface instead of bouncing between dozens of dashboards.

Speakeasy gave Fermat three critical capabilities for driving the transformation:

• Connect everything to Claude: SaaS tools like Salesforce alongside internal APIs, all accessible through a single platform without each team building and maintaining their own integrations
• Usage insights: Leadership could see adoption across teams and individuals, understanding who had shifted their workflows and where people were still stuck in the old way of working
• Safe provisioning at scale: Roll out access to the entire company with proper permissions, ensuring internal data and credentials stay protected

Workflows transformed across the company

The impact wasn’t limited to engineering. People across Fermat, from customer success managers to operations, saw their daily workflows fundamentally change.

Team members in customer-facing roles found that tasks requiring two hours of manual work could now be completed in minutes. Instead of navigating multiple UIs and dashboards, they could ask Claude to pull the data, run the analysis, or trigger the workflow directly.

With over 300 tools connected and thousands of interactions per week, Claude + Speakeasy became the default way people get work done at Fermat.

From internal adoption to a public MCP server

As Fermat’s internal AI transformation matured, the team saw a natural next step: if connecting every service to Claude had transformed how their own employees work, why not give their customers the same power?

In March 2026, Fermat launched its External MCP Endpoint  — a scoped-down public MCP server that lets brands query their Fermat data from any MCP-compatible AI tool. Backcountry was the first external brand live on the integration.

The public server was designed with three principles in mind:

• Read-only by design: All 36 tools exposed through the public server are strictly read-only, spanning product catalog, funnel analytics, AI Search, experiments, session recordings, heatmaps, and more. Write operations remain gated to internal users, with plans to roll them out methodically to prevent unintended changes to live storefronts
• End-user auth through Auth0: Every external connection is authenticated via Auth0 PKCE OAuth, scoped per-brand and HTTPS-encrypted. This gives Fermat fine-grained control over who can access what, without managing credentials manually
• Full visibility into usage: Just as Speakeasy gave Fermat’s leadership insight into internal AI adoption, the public server provides complete observability into how external brands and AI tools are interacting with the platform — which tools are being called, by whom, and how often

The progression from internal MCP adoption to a customer-facing public server is a powerful proof point. By building confidence with internal tooling first, Fermat was able to ship a production-ready external integration that met enterprise security requirements from day one.

What’s next

Fermat’s AI-native transformation is still accelerating — both internally and externally. The team continues to connect more services to Claude, adoption keeps growing as more team members discover workflows they can collapse from hours to minutes, and their customers now have a direct line from their own AI tools into Fermat’s platform.

For any company considering the same shift, Fermat’s experience offers a clear lesson: the technology to make Claude the company’s operating system is available today. And once your team experiences the transformation internally, extending it to your customers becomes the natural next step.

Learn more about making Claude the operating system for your company:

• Speakeasy MCP Platform