Fundraising FoxLayer
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Layer is an open source provider of tooling for the Model Context Protocol (MCP).
Also known as buildwithlayer · Layer
Founders & leadership
Investors · 4
How we know: av.vc · Not right? Tell us
How we know: Expansion Venture Capital's portfolio page · Not right? Tell us
How we know: Resolute Ventures's portfolio page · the VCSheet dataset · Not right? Tell us
How we know: the VCSheet dataset · Not right? Tell us
Funding
SEC filings, press & company announcements- Undisclosed amountSeed FundingAug 2026Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
Company profile
researched Aug 2026Layer, which operates the GitHub organization "buildwithlayer", describes itself as an open source provider for all things MCP (Model Context Protocol). Its public repositories center on developer tooling for building and operating MCP servers, including openapi-to-tools, a TypeScript package that converts OpenAPI routes into tools usable by MCP servers or other LLM applications, with a companion demo repository. Additional libraries covering OpenAPI Zod schemas and JSON Schema Zod schemas are listed as forthcoming.
Other public projects include mcp-evals, a CLI tool for evaluating MCP servers; mcp-analytics, an MIT-licensed package that adds an API callback for an MCP server's tool calls; and mcp-http-demo, a tutorial for building a streamable HTTP MCP server. The organization also maintains application-level projects such as SnapLinear, which converts an uploaded standup call recording into Linear tasks, and its fork SnapTask, plus repositories for the Layer website and a Layer Labs website. Most repositories are written in TypeScript.
▸Full profile — technology, go-to-market
Technology
Layer's published work is built around the Model Context Protocol. Its tooling converts OpenAPI route definitions into tool definitions consumable by MCP servers and other LLM applications, supports streamable HTTP MCP servers, provides evaluation of MCP servers via a command-line tool, and adds analytics callbacks for MCP tool calls. Planned components include Zod schema generation from OpenAPI and JSON Schema. The codebase is predominantly TypeScript, with additional repositories in HTML, JavaScript, Python and Vue.
Go-to-market
Layer distributes its libraries and demos as public open source repositories on GitHub under the buildwithlayer organization.
Developers and teams building MCP servers and LLM-based applications; the SnapLinear project targets software teams that run standup calls and track work in Linear.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
▸Research sources · 8
primary sources listed
- Layer · GitHubgithub.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Layer do?
- Layer is an open source provider of tooling for the Model Context Protocol (MCP).
- Who founded Layer?
- Layer was founded by Jonah Katz, Andrew Hamilton.
- Who are Layer's investors?
- Layer's investors include Alumni Ventures, Expansion Venture Capital, Resolute Ventures, Entrepreneurs Roundtable Accelerator (ERA).