--- title: "Exa MCP: review, setup & limitations · Undominated.ai" canonical: https://undominated.ai/mcp-servers/exa/ description: "Connects an assistant to Exa web search, content retrieval and optional multi-step research tools." --- # Exa MCP: review, setup & limitations · Undominated.ai > Connects an assistant to Exa web search, content retrieval and optional multi-step research tools. [← Explore all mcp servers](/mcp-servers/) WEB RESEARCH / Exa # Exa MCP Connects an assistant to Exa web search, content retrieval and optional multi-step research tools. See setup guidance ↓Original source ↗ SOURCE REVIEW Reviewed 2026-09-21 Evidence 5 linked sources Publisher Exa Licence MIT ↗ Revision 15ffb50519e7 Read what was—and wasn’t—checked ↓ “Connect to Exa's hosted MCP server:” Exa · upstream description ↗ Our analysis follows below. 01 / THE REASONING ## Why this made the selection. - Supports a hosted endpoint and a separately inspectable local stdio path. - Documents tool selection and the authentication difference between anonymous search and Exa Agent. ### A good fit for - Finding source pages and retrieving relevant web context for a research task. ### Weigh up before choosing - Anonymous hosted use is rate-limited; Exa Agent requires OAuth or an API key. - A tools URL parameter replaces the default tool set rather than adding to it. 02 / THE REVIEW RECORD ## What we actually inspected. Source review has boundaries. A clear record is more useful than a “safe” badge. ### Material inspected - README.md (installation, capability and permission sections) - package.json - src/stdio.ts - src/tools/webSearch.ts - LICENSE ### Our findings - The web-search tool declares readOnlyHint and openWorldHint; returned web content is external data. - The local implementation supports tool-list configuration; the hosted service is subject to its own account terms. ### Not established by this review - Server startup, authentication and tool execution were not tested. The review applies to the material and revision named here. A newer upstream release can change its behavior. 03 / PUT IT TO WORK ## Connect a server deliberately. Upstream setup instructions ↗ - Add https://mcp.exa.ai/mcp using the official client configuration. - Authenticate when using Exa Agent or higher account limits; specify all required tools if overriding the defaults. ### Before you start - A remote-capable MCP client; Exa authentication for restricted capabilities. ### Documented configuration example Use the client and authentication context described in the setup guidance. Configuration formats vary between hosts. { "mcpServers": { "exa": { "type": "streamable-http", "url": "https://mcp.exa.ai/mcp" } } } Copy configuration ↗ ### Compatibility An MCP client supporting stdio, Streamable HTTP. · A remote-capable MCP client; Exa authentication for restricted capabilities. · Configuration example follows the official mcpServers form; other clients use different keys or transport labels. ### Implementation TypeScript ### Transports stdio · Streamable HTTP ### Web research / Remote service - Sends queries and research requests to Exa and returns third-party web content. ### Cost model Anonymous usage is limited; authenticated Exa service usage follows the account plan. 04 / FOLLOW THE EVIDENCE ## The source trail. Our notes are separate from the original resource. Check upstream before adopting a new version. - Official documentation ↗ Checked 2026-09-21 https://github.com/exa-labs/exa-mcp-server/blob/15ffb50519e719dc791cdc750ce5ed1934c0a1ed/README.md Supports: summary, whySelected, bestFor, limitations, install, access, compatibility, transports - Applicable source licence ↗ Checked 2026-09-21 https://github.com/exa-labs/exa-mcp-server/blob/15ffb50519e719dc791cdc750ce5ed1934c0a1ed/LICENSE Supports: license - Implementation: package.json ↗ Checked 2026-09-21 https://github.com/exa-labs/exa-mcp-server/blob/15ffb50519e719dc791cdc750ce5ed1934c0a1ed/package.json Supports: language, review - Implementation: src/stdio.ts ↗ Checked 2026-09-21 https://github.com/exa-labs/exa-mcp-server/blob/15ffb50519e719dc791cdc750ce5ed1934c0a1ed/src/stdio.ts Supports: language, review - Implementation: src/tools/webSearch.ts ↗ Checked 2026-09-21 https://github.com/exa-labs/exa-mcp-server/blob/15ffb50519e719dc791cdc750ce5ed1934c0a1ed/src/tools/webSearch.ts Supports: language, review KEEP COMPARING ## Other approaches to consider. Related by category or shared topics. These are alternatives to inspect, not a measured quality order. [### Tavily MCP ↗ Combines web search, extraction, mapping and crawling through local stdio or Tavily’s hosted MCP service.](/mcp-servers/tavily/)[### Fetch MCP reference server ↗ Retrieve a URL as text or Markdown in chunks through a small local MCP server.](/mcp-servers/fetch/)[### Brave Search MCP ↗ Provides web, news, image, video and place search using the Brave Search API.](/mcp-servers/brave/) [AI Tools ↗](/tools/)[Skills ↗](/skills/)[Agents ↗](/agents/)[MCP Servers ↗](/mcp-servers/)