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Exa MCP ServerExa MCP Server

Exa

MCPMCP 搜索Search 抓取Scraping MITMIT 远程托管Remote-hosted 匿名可用Anonymous access partial lifecycle: active 核验Checked 2026-10-23

Exa 官方 MCP server（MIT）：默认就两工具——web_search_exa 搜索、web_fetch_exa 读正文，干净 markdown 直供 agent。匿名就能连（限流），OAuth/API key 提额并解锁 Exa Agent 多步研究。诚实标注：GitHub releases 为空，发版线在 npm；advanced search 与 agent_run 要 ?tools= 显式开。

Exa's official MCP server (MIT): two default tools — web_search_exa and web_fetch_exa, clean markdown straight to the agent. Anonymous access works (rate-limited); OAuth/API key raises limits and unlocks the multi-step Exa Agent. Honest note: GitHub releases is empty, the release line is npm; advanced search and agent_run need explicit ?tools= opt-in.

适合与不适合When to use it, when not to

适合：要「搜索+读正文」二合一的检索面、零门槛接入、多步研究 Agent 进阶面。不适合：站点级爬取编排（firecrawl 线）；完全离线场景。

Fits: a combined search+read retrieval lane, zero-barrier onboarding (anonymous works), the multi-step research Agent as the advanced lane. Not a fit: site-level crawl orchestration (that is the firecrawl line); fully offline setups.

中文生态China availability 国产 / 国内可直接用 / 备案状态 · 快照domestic / direct access / CAC filing · snapshot 2026-10-23

出品属地Origin: 国外出品foreign-made　Exa（前 Metaphor Systems，美国）。Exa (formerly Metaphor Systems, US).
国内使用Direct access: 直连不可达direct blocked　exa.ai 与 mcp.exa.ai 直连实测 000（网络受限，非死链）；GitHub 仓与 raw README 经代理 200（2026-10-23）。exa.ai and mcp.exa.ai measured 000 direct (network restricted, not dead); the GitHub repo and raw README returned 200 via proxy (2026-10-23).
备案状态CAC filing: 未见于备案名单not in filing list：未见于网信办公示名单（2026-10-23 检索）；该产品未面向大陆公众提供服务，备案不适用。not in the CAC public registry (searched 2026-10-23); the product does not serve the mainland public, so filing does not apply.

备案信息以网信办《生成式人工智能服务已备案信息》公示名单为准（按批次滚动更新，本站只抄编号不解读）；「大陆可直连」是本站从大陆网络直连实测的结果，不是厂商承诺。GitHub 类站点当日实测有波动，口径写在依据里。Filing status is quoted from the CAC public registry (updated batch by batch; this site copies the number and does not interpret it). "Direct access" is this site's own reachability measurement from a mainland network, not a vendor promise. GitHub-hosted sites fluctuated on the measurement day — the note says so.

固定坐标系Fixed coordinate system

11 个维度dimensions, 与同分区其他对象逐项可比each comparable item by item against others in the same section.

模型与开放条件Model & openness: 它自己不调模型——被 MCP 客户端调用的接口实现。它把 Exa 的检索与抓取（web search、网页正文、多步研究 Agent）包装成工具给 agent 用。
It calls no model itself — an interface implementation called by MCP clients. It wraps Exa's retrieval and fetching (web search, web page text, multi-step research Agent) as tools for agents.
运行位置Where it runs: 官方托管远程 server（https://mcp.exa.ai/mcp，streamable-http）为主；仓同时是 Agent Plugin（agent-plugins.org 生态）与 Claude/Codex 插件线。 GitHub 5,162★，最近推送 2026-10-19（API 核验）；GitHub releases 为空，发版线在 npm（exa-mcp-server 3.4.2）。
Mainly the official hosted remote server (https://mcp.exa.ai/mcp, streamable-http); the repo doubles as an Agent Plugin (agent-plugins.org ecosystem) and a Claude/Codex plugin line. GitHub 5,162★, last push 2026-10-19 (API verified); GitHub releases are empty, the release line lives on npm (exa-mcp-server 3.4.2).
本地文件Local files: 不读写本机文件——输出检索结果与网页正文（clean markdown）。
Reads and writes no local files — it outputs search results and web page text (clean markdown).
关机后的任务Tasks after shutdown: 服务在 Exa 侧；会话请求-响应，无后台监听语义。
The service lives on Exa's side; session request-response, no background-listening semantics.
工具与扩展Tools & extensions: 默认两工具：web_search_exa（搜索取干净内容）、web_fetch_exa（按 URL 读全文 markdown）；可选工具经 URL 参数 ?tools= 开启：web_search_advanced_exa（过滤/域名/日期/子页爬取）、 agent_run（Exa Agent 多步研究/列表构建/结构化输出）。仓内 skills/ 目录带 search 与 exa-agent 两个 Agent Skill（插件安装时装载）。
Two tools by default: web_search_exa (search for clean content), web_fetch_exa (read full-page markdown by URL); optional tools are enabled via the URL parameter ?tools=: web_search_advanced_exa (filters/domains/dates/subpage crawling), agent_run (Exa Agent multi-step research / list building / structured output). The repo's skills/ directory ships two Agent Skills, search and exa-agent (loaded when the plugin is installed).
上下文与记忆Context & memory: 无 server 侧跨会话记忆——每次检索独立；多步状态在 Exa Agent 任务内。
No server-side cross-session memory — each retrieval is independent; multi-step state lives inside the Exa Agent task.
权限与限制Permissions & limits: 匿名可用：托管端点匿名接入带速率限制（官方 README 口径）；提额与 Exa Agent 要 OAuth（推荐，客户端弹登录）或 API key （?exaApiKey= 参数 / Authorization Bearer / x-api-key 三种传法）。纯读面——不能写任何系统，风险面是查询内容外发与配额。
Usable anonymously: the hosted endpoint accepts anonymous connections with rate limits (official README wording); higher quotas and Exa Agent require OAuth (recommended, the client pops a login) or an API key (three ways: ?exaApiKey= parameter / Authorization Bearer / x-api-key). Purely read-only surface — it cannot write to any system; the risk surface is query content leaving your machine and quota.
适合什么任务Best for: 适合：给 agent 一路「搜索+读正文」二合一的检索面（默认两工具就覆盖）、零门槛接入（匿名可用）、要多步研究 Agent 的进阶面。不适合：要深度站点级爬取编排（crawl/map 这类面在 firecrawl 线）；要完全离线（托管线要连 Exa）。
Fits: giving an agent one route with a combined "search + read text" retrieval surface (the two default tools cover it), zero-barrier onboarding (anonymous works), and the advanced multi-step research Agent surface. Not a fit: deep site-level crawl orchestration (the crawl/map surface lives in the firecrawl line); fully offline use (the hosted line needs to reach Exa).
传输方式Transport: streamable-http（https://mcp.exa.ai/mcp）；经 Agent Plugin / Claude / Codex 插件线安装时同一托管端点。核验：仓 README（2026-10-23 直抓）。
streamable-http (https://mcp.exa.ai/mcp); the same hosted endpoint when installed via the Agent Plugin / Claude / Codex plugin lines. Verified: repo README (fetched directly 2026-10-23).
认证机制Authentication: 匿名可用（限流）；OAuth 优先（?login 或 /oauth 强制登录流）； API key 可走 ?exaApiKey= 查询参数、Authorization Bearer 或 x-api-key 头。
Anonymous works (rate-limited); OAuth first (?login or /oauth force the login flow); API key can go through the ?exaApiKey= query parameter, Authorization Bearer, or the x-api-key header.
权限范围Permission scope: 纯读：搜索族 + 网页读取 + 研究 Agent。无写面；无审批需求。
Purely read: search family + web page reading + research Agent. No write surface; no approval needs.

头号误解Top misconception

只看到默认两工具——advanced search 与 agent_run 要经 ?tools= 参数显式开启，且会替换默认集（官方 README：include all you want）Seeing only the two default tools — advanced search and agent_run require the ?tools= URL parameter, which REPLACES the default set (README: include all you want)
把 GitHub releases 当发版线——该仓 releases 为空，现役版本在 npm（exa-mcp-server）Treating GitHub releases as the release line — that repo's releases are empty; the live version is on npm (exa-mcp-server)
匿名档当正式档——匿名可用但限流；Exa Agent 必须鉴权（OAuth 或 key）Treating the anonymous tier as production — anonymous works but is rate-limited; Exa Agent requires auth (OAuth or key)
把「搜索」与「整站爬取」混为一谈——它给检索与单页正文，站点级 crawl/map 不是它的形态Confusing "search" with "whole-site crawling" — it gives retrieval and single-page content; site-level crawl/map is not its shape

未知项清单Known unknowns

匿名档与鉴权档的速率限制具体数值（官方 README 只说 rate limits，未逐条核验；按快照纪律不记数字）
Exa Agent 的工具面与 Connect providers 细节（README 指向 docs.exa.ai，未逐页核验）
Agent Plugin 生态的兼容客户端清单（README 引 agent-plugins.org，未逐条核验）

The exact rate limits of the anonymous vs authenticated tiers (the official README only says "rate limits", not verified item by item; per snapshot discipline no numbers are recorded)
The Exa Agent tool surface and Connect providers details (README points to docs.exa.ai, not verified page by page)
The compatible-client list of the Agent Plugin ecosystem (README cites agent-plugins.org, not verified item by item)

证据来源Evidence sources

判断可回到以下一手源复核。本站核验日Every judgement can be rechecked against the primary sources below. Verified on 2026-10-23，内容更新日content updated on 2026-10-23。

类型Type	名称Name	链接Link
repo	exa-labs/exa-mcp-server · 仓库（MIT；5,162★，最近推送 2026-10-19，GitHub API 核验）exa-labs/exa-mcp-server · repository (MIT; 5,162★, last push 2026-10-19, GitHub API verified)	https://github.com/exa-labs/exa-mcp-server
changelog	npm · exa-mcp-server（发版线：GitHub releases 为空，npm 3.4.2 为最新）npm · exa-mcp-server (release line: GitHub releases are empty, npm 3.4.2 is latest)	https://www.npmjs.com/package/exa-mcp-server
docs	Exa · 官方 MCP 文档（仓 homepage 字段指向；直抓 000 网络受限，未逐页核验）Exa · official MCP docs (pointed to by the repo homepage field; direct fetch returned 000 network-restricted, not page-verified)	https://exa.ai/docs/reference/exa-mcp

实测记录Measured runs

本档未在真实客户端逐项跑通；工具清单与权限来自官方 README。

This site has not completed measured runs. The test protocol is at protocols/mcp/_protocol.md.