Source: https://seerepo.com/r/modelcontextprotocol/inspector/built Markdown source: https://seerepo.com/r/modelcontextprotocol/inspector/built.md Description: inspector is a TypeScript repo built with Vite, React, Express, and Hono. It makes its content with yaml, papaparse, react-markdown, and remark-gfm. # What is inspector built with? inspector is a TypeScript repo built with Vite, React, Express, and Hono. It makes its content with yaml, papaparse, react-markdown, and remark-gfm, validates its data with Zod and Ajv, is tested with Vitest, ink-testing-library, and Testing Library, deploys with pino and @hono/node-server, and uses MCP. It has 465,914 written lines, with 717 test files. Read on November 12, 2026, at commit 488c30d. Repository: https://github.com/modelcontextprotocol/inspector ## Frontend (/) ### The base - **[Vite](https://seerepo.com/uses/vite)**: [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) - **[React](https://seerepo.com/uses/react)**: 19 files · [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) ## Backend (/) ### The base - **[Express](https://seerepo.com/uses/express)**: 3 files - **[Hono](https://seerepo.com/uses/hono)**: 1 file · [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 55 files · [clients/web/src/utils/mcpNetworkHeaders.ts, line 1](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/clients/web/src/utils/mcpNetworkHeaders.ts#L1) ## Support (/) ### Content - **[yaml](https://seerepo.com/uses/yaml)**: 2 files ### Validation - **[Zod](https://seerepo.com/uses/zod)**: 12 files - **[Ajv](https://seerepo.com/uses/ajv)**: 1 file ### Testing - **Vitest**: 5 files ### Deploy - **[pino](https://seerepo.com/uses/pino)**: 3 files ### Tools - **chokidar**: 1 file ### Other - **undici**: 2 files - **@napi-rs/keyring**: 1 file - **atomically**: 1 file - **open**: 1 file - **proper-lockfile**: 1 file - **SemVer**: 1 file ## Backend (clients/cli) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 2 files · [clients/web/src/utils/mcpNetworkHeaders.ts, line 1](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/clients/web/src/utils/mcpNetworkHeaders.ts#L1) ## Support (clients/cli) ### Testing - **Vitest**: 58 files - **[Zod](https://seerepo.com/uses/zod)**: 1 file ### Tools - **commander**: 2 files ## Support (clients/launcher) ### Testing - **Vitest**: 1 file ### Tools - **commander**: 1 file ## Backend (clients/mcpdo) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 1 file · [clients/web/src/utils/mcpNetworkHeaders.ts, line 1](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/clients/web/src/utils/mcpNetworkHeaders.ts#L1) ## Support (clients/mcpdo) ### Testing - **Vitest**: 44 files ### Tools - **commander**: 1 file ## Frontend (clients/tui) ### Interface - **[ink](https://seerepo.com/uses/ink)**: 28 files - **ink-scroll-view**: 17 files ## Backend (clients/tui) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 2 files · [clients/web/src/utils/mcpNetworkHeaders.ts, line 1](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/clients/web/src/utils/mcpNetworkHeaders.ts#L1) ## Support (clients/tui) ### Testing - **Vitest**: 54 files - **ink-testing-library**: 1 file ### Deploy - **[pino](https://seerepo.com/uses/pino)**: 1 file ### Tools - **commander**: 1 file - **tsdown**: 1 file ### Other - **strip-ansi**: 1 file ## Frontend (clients/web) ### The base - **[Vite](https://seerepo.com/uses/vite)**: 2 files · [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) - **[React](https://seerepo.com/uses/react)**: 1 file · [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) ### Interface - **[Mantine](https://seerepo.com/uses/mantine)**: 177 files - **[dnd-kit](https://seerepo.com/uses/dnd-kit)**: 4 files - **[ace-builds](https://seerepo.com/uses/ace-builds)**: 1 file - **react-ace**: 1 file ### Icons - **[react-icons](https://seerepo.com/uses/react-icons)**: 24 files ## Backend (clients/web) ### The base - **[Express](https://seerepo.com/uses/express)**: 3 files - **[Hono](https://seerepo.com/uses/hono)**: 1 file · [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) ### Services - **[MCP](https://seerepo.com/uses/mcp)**: 7 files · [clients/web/src/utils/mcpNetworkHeaders.ts, line 1](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/clients/web/src/utils/mcpNetworkHeaders.ts#L1) ## Support (clients/web) ### Content - **[papaparse](https://seerepo.com/uses/papaparse)**: 1 file - **[react-markdown](https://seerepo.com/uses/react-markdown)**: 1 file - **[remark-gfm](https://seerepo.com/uses/remark-gfm)**: 1 file ### Validation - **[Ajv](https://seerepo.com/uses/ajv)**: 1 file ### Testing - **Vitest**: 514 files - **Testing Library**: 147 files ### Deploy - **[@hono/node-server](https://seerepo.com/uses/hono-node-server)**: 1 file ### Tools - **Storybook**: 3 files - **@vitejs/plugin-react**: 1 file - **commander**: 1 file ### Other - **proper-lockfile**: 1 file ## Other repos with a similar stack - [paperclipai/paperclip](https://seerepo.com/r/paperclipai/paperclip/built): Vite, React, Express, MCP, yaml, Zod, Ajv, pino, dnd-kit, react-markdown, remark-gfm · [Compare](https://seerepo.com/compare/modelcontextprotocol/inspector/vs/paperclipai/paperclip) - [cheaper-inference/OmniRoute](https://seerepo.com/r/cheaper-inference/OmniRoute/built): React, Express, MCP, Zod, Ajv, pino, dnd-kit, react-markdown, remark-gfm · [Compare](https://seerepo.com/compare/cheaper-inference/OmniRoute/vs/modelcontextprotocol/inspector) - [ruvnet/ruflo](https://seerepo.com/r/ruvnet/ruflo/built): Vite, React, Express, Hono, MCP, yaml, Zod, Ajv, pino · [Compare](https://seerepo.com/compare/modelcontextprotocol/inspector/vs/ruvnet/ruflo) - [tashfeenahmed/freellmapi](https://seerepo.com/r/tashfeenahmed/freellmapi/built): Vite, React, Express, yaml, Zod, Ajv, dnd-kit, react-markdown, remark-gfm · [Compare](https://seerepo.com/compare/modelcontextprotocol/inspector/vs/tashfeenahmed/freellmapi) - [langflow-ai/langflow](https://seerepo.com/r/langflow-ai/langflow/built): Vite, React, MCP, ace-builds, react-ace, react-icons, react-markdown, remark-gfm · [Compare](https://seerepo.com/compare/langflow-ai/langflow/vs/modelcontextprotocol/inspector) - [supabase/supabase](https://seerepo.com/r/supabase/supabase/built): Vite, React, MCP, Zod, dnd-kit, papaparse, react-markdown, remark-gfm · [Compare](https://seerepo.com/compare/modelcontextprotocol/inspector/vs/supabase/supabase) ## Frequently asked questions ### What language is inspector written in? inspector is written in TypeScript, with 465,914 written lines. ### What framework does inspector use? inspector is built with Vite, React, Express, and Hono. The proof: [in package.json](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/package.json) ### What services does inspector use? inspector uses MCP. The proof: [clients/web/src/utils/mcpNetworkHeaders.ts, line 1](https://github.com/modelcontextprotocol/inspector/blob/488c30d9d16e4993bc548ad298eb7450f5125c93/clients/web/src/utils/mcpNetworkHeaders.ts#L1) ### Does inspector have tests? Yes. inspector has 717 test files and is tested with Vitest, ink-testing-library, and Testing Library. ### Which repos have a stack like inspector's? The ones that share most of its stack: paperclipai/paperclip, cheaper-inference/OmniRoute, and ruvnet/ruflo. ## What is your repo built with? Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.