Gsearch

MCP tools over Google Search, through a dedicated logged-in browser profile. Personalized organic results, ads stripped, the full advanced-operator surface, and pagination.

Published on PyPI as gsearch-mcp (google-search-mcp was already taken, by an unrelated Custom Search API wrapper). Import package and repo keep the longer name.

Three-layer shape: all site knowledge in client.py, a CLI that mirrors the tools 1:1 as the debugging surface, and a thin MCP wrapper.

Why this exists

No official Google Search API serves this intent. The Custom Search JSON API returns results from a configured subset of the web with no personalization, is closed to new customers, and sunsets 1 Jan 2027. That is a §0 Q1 negative on all three sub-questions.

What you get that a keyword search API does not:

• The advanced-operator surface — site:, filetype:, exact phrase, exclusions, before:/after: bounds, freshness windows down to the past hour, verbatim (no synonyms or stemming), every Google vertical, region and language bias. All server-side, all free once the transport works. This is the strongest reason to use it; no keyword API has an equivalent.
• Better sources on technical queries. Measured head-to-head against the harness WebSearch and the Brave API on MCP stateless server migration: this returned the Google and Cloudflare engineering blogs, the spec's own GitHub issue and the Spring docs, where both alternatives returned a page of SEO blogspam paraphrasing the same announcement. Full comparison in docs/ROADMAP.md.
• Personalized ranking. Measured at ~3.4× the run-to-run noise floor: disabling it moved roughly a third of the top-10. Qualitatively it resolves ambiguous technical queries toward the domain sense — spring returns Spring Framework rather than the film, mcp server returns Cloudflare's engineering blog rather than a content farm. Full method and caveats in ~/dev/google-search-recon/RESULT.md.
• Ads stripped structurally, before the agent sees them.

Setup

No checkout needed. Sign in once, then point your MCP client at it.

uvx --from gsearch-mcp gsearch login

login opens a window; it downloads a browser first if you have neither Chrome nor Playwright's Chromium. Sign in to the account you want searches personalized to. The window closes itself once the sign-in lands. This profile is separate from your Chrome, so Chrome's /u/0 default does not apply — whatever you sign in as here is what gets used, deliberately. Check with uvx --from gsearch-mcp gsearch status, which reads the account off the page rather than assuming it.

Signed out still works; it just returns the neutral, unpersonalized view.

Then, in your MCP client's config:

{
  "mcpServers": {
    "google-search": {
      "type": "stdio",
      "command": "uvx",
      "args": ["gsearch-mcp"]
    }
  }
}

That entry is the same on every OS. Nothing in it is a path.

Bring your own account

There is no API key. The credential is a Google account you sign into once, and the tool uses whatever that is — so results are personalized to your history, not to a service account's. Run gsearch login again to switch accounts.

Several agents on one box each want their own profile, because Chromium takes an exclusive lock on a profile directory and two agents sharing one will collide:

GOOGLE_MCP_PROFILE=agent  uvx --from gsearch-mcp gsearch login

then set "env": {"GOOGLE_MCP_PROFILE": "agent"} on that client's server entry.

Environment

var	default	what it does
GOOGLE_MCP_PROFILE	default	which signed-in profile to use; one per agent
GOOGLE_MCP_SESSION_ROOT	per-OS user data dir	where profiles live
GOOGLE_MCP_LOCALE	the host's	browser locale, e.g. en-US
GOOGLE_MCP_TIMEZONE	the host's	browser timezone, e.g. Europe/Berlin
GOOGLE_MCP_HEADLESS	0	headless is a different fingerprint; verify against /sorry/ before trusting it
GOOGLE_MCP_OFFSCREEN	1	park the window offscreen instead of taking over the desktop
GOOGLE_MCP_TRANSPORT	stdio	http serves streamable HTTP instead; see below
GOOGLE_MCP_HTTP_HOST	127.0.0.1	http transport only
GOOGLE_MCP_HTTP_PORT	8766	http transport only

Profiles default to %LOCALAPPDATA%\gsearch-mcp\profiles on Windows, ~/Library/Application Support/gsearch-mcp/profiles on macOS, and $XDG_DATA_HOME/gsearch-mcp/profiles on Linux. They are deliberately not stored next to the code: under uvx that location is rebuilt on every version bump, and a session kept there would vanish on upgrade and report itself as a login failure.

Use

uvx --from gsearch-mcp gsearch status
uvx --from gsearch-mcp gsearch search "model context protocol" --site modelcontextprotocol.io
uvx --from gsearch-mcp gsearch search "agent harness" --freshness week --no-personalized
uvx --from gsearch-mcp gsearch multi-search "mcp spec" "mcp security" "mcp transports"

As an MCP server (stdio): gsearch-mcp.

One server, many agents

The profile is exclusive. Chromium takes an exclusive lock on a user-data-dir, and the browser is launched on first use and held until the process exits -- so under stdio, where every client spawns its own server, the first agent to search keeps the profile for its whole lifetime and every other agent gets rate_limited. Measured 2026-08-11: one client held it from 19:15 to 21:53, releasing only when that client exited.

Run one server and point every client at it:

GOOGLE_MCP_TRANSPORT=http gsearch-mcp

then register it as a URL server rather than a command, e.g.

claude mcp add --transport http google-search http://127.0.0.1:8766/mcp

Funnelling concurrent callers into one process is safe by construction: every browser call goes through session.in_browser_thread, a single-worker executor, so requests queue instead of colliding. Verified with two simultaneous clients -- both returned results, no rate_limited, finishing at 2.0s and 7.5s. Sequential service is what the anti-bot side wants anyway, which is why google_multi_search is deliberately serial.

The alternative, one profile per agent via GOOGLE_MCP_PROFILE, costs a gsearch login each, a browser each, and more query volume from a single exit IP -- which is what draws /sorry/.

From a checkout

uv venv --python 3.12
uv pip install -e ".[dev]"
.venv/Scripts/python.exe -m google_search_mcp.cli login

A checkout keeps its profiles in a repo-local .session/ if that directory already exists, so an existing signed-in profile keeps working after upgrading to a packaged install.

tool	what it is for
google_search	one query, ads stripped, full operator surface, every vertical
google_multi_search	several queries through one warmed browser — the compound tool
google_fetch	read pages as markdown through the logged-in browser
google_ai_mode	Google's AI Mode answer + citations. Unreliable — see below
google_session_status	whether the profile is signed in, and as whom

Reading pages

google_search(..., with_content=True) attaches the top results' article text as markdown, and google_fetch does it for arbitrary URLs. Both go through the same warmed, logged-in Chrome, which is the point: it reads JS-rendered apps, soft paywalls and cookie-walled articles that a plain HTTP fetch cannot. For a static public page an ordinary fetch is cheaper and you should use one.

The browser renders; trafilatura strips the boilerplate. Nav, footers, cookie banners and related-story rails go; headings, lists, tables and code fences survive. Markdown rather than plain text because on a technical page the structure carries most of the meaning, and it still costs far fewer tokens than the HTML.

Measured 2026-08-07, whole article against the raw DOM it came from:

page	raw HTML	markdown
blog.cloudflare.com/mcp-v2	615,709	18,093	2.9%
modelcontextprotocol.io spec	294,995	4,708	1.6%

Roughly a 30–60× reduction before truncation even applies.

There is no cached copy to read instead. Google retired its page cache on 2 Feb 2024 — cache: and webcache.googleusercontent.com are both gone. The Wayback Machine is the only general cache left and it is the wrong source here: it would serve months-old text to a tool whose entire edge is recency. Live fetch is fresher and more capable.

Bounded by default (3 results, 2000 chars each, 5 URLs per google_fetch) because unbounded this is a crawler, and each page is a real load — budget a few seconds per result.

Verticals

Each one renders differently and each names its own extractor. Counts below are live, 2026-08-07, on the same query.

vertical	udm	anchor	notes
web	—	a h3	the default SERP, rich blocks included
web_only	web	a h3	the "Web" tab. Cleanest for research — 17 external anchors against 56 on the default SERP
news	12	[role=heading]	every result carries a date
videos	7	a h3
short_videos	39	[role=heading]
books	36	a h3	results are google-hosted by nature
images	2	a:has(img)	single page; title comes from the anchor, not alt

shopping (udm=28) is deliberately unmapped: it renders product cards with no external anchors and no headings, so there is nothing for a link-and-snippet projection to return. Shipping it would mean advertising a vertical that always yields zero.

Why not one selector for all of them. Broadening the anchor to [role="heading"] everywhere looks like the obvious fix and quietly breaks the ad guarantee. On hotel berlin buchen, a h3 found 10 results with 0 inside an ad container, while a [role="heading"] found 2 — both of them ads. It fails invisibly, because on a technical query the same selector returns 7 with no ads at all. So web keeps a h3 and its structural guarantee, and on role-anchored verticals the ad-container filter is load-bearing rather than defence-in-depth.

AI Mode

google_ai_mode returns Google's generated answer and its citations. Treat the answer as a lead, never as a fact. It is hit or miss, confidently wrong in the same voice it is right, and not authoritative even about Google's own products — which is the trap, since those are the queries where it reads most credible. The citations are the part worth keeping; read them and believe those.

Absence is normal, not a failure: it is not offered for every query, region or account, and returns available: false with a reason rather than an error. Slower than a search — the answer streams and is polled until it stops growing (~4s typical, 20s cap).

Cost model

The first call in a process launches a browser and warms the profile (~10s). Each page after that is one throttled load (4–7s). Pages are 10 results and depth costs a round trip — Google stopped honouring num= on 11 Sept 2025. Prefer google_multi_search over several google_search calls; it amortises the launch across the set.

google_ai_mode costs more: the answer streams, so it is polled until the text stops growing — typically ~4–8s on top of the page load, capped at 20s.

Profiles take an exclusive lock. Chromium locks a user-data-dir, so Claude Code, pi and a dispatch worker cannot share one. Give each consumer its own: set GOOGLE_MCP_PROFILE and run cli login once for that name. A collision surfaces as rate_limited with a message naming the real cause, because the correct response genuinely is back off and retry.

Transport, and the one flag that matters

ignore_default_args=["--enable-automation"]. Measured 2026-08-07 on a residential IP:

vehicle	result
bundled Chromium, flag present	/sorry/ on query 1
bundled Chromium, flag stripped	OK
real Chrome (channel), flag present	OK
any vehicle over a VPN	CAPTCHA

playwright-stealth and full behavioural realism did not substitute for it. A residential exit IP is required regardless of vehicle. Chrome does not need to be installed — bundled Chromium passes on its own with the flag stripped, so this runs on pi or any other box.

Environment: GOOGLE_MCP_PROFILE (default default), GOOGLE_MCP_HEADLESS (default 0), GOOGLE_MCP_OFFSCREEN (default 1, parks the window at -2400,-2400).

Errors

Failing results carry a kind field (paradigm §3.1): auth_expired (sign in, never retry), schema_drift (extractor stale, never retry, flag it), rate_limited (back off), bad_argument (fix the call, never retry unchanged).

empty is not an error — a query matching nothing returns count: 0 with no kind. Neither is an absent AI Mode answer, which returns available: false with a reason.

schema_drift is the expected long-run failure mode here: Google's SERP markup is obfuscated and rotates by design. When it fires, the extractor in client.py::EXTRACT_JS needs updating, and docs/API.md's field-semantics section records the traps that make that quick.

Legal

Automated querying of google.com/search is contrary to Google's ToS. Recorded as an owner decision in docs/API.md: read-only, sequential, throttled, personal-scale, no republication. The session profile is gitignored and is never copied, attached, or handed to another agent.