AI ads infrastructure
Claude vs Gemini for Google Ads (2026)
Claude and Gemini can both connect to Google Ads through MCP in 2026. Compare Claude's broad connector availability with Gemini CLI and the eligible Gemini web-app rollout.
Claude and Gemini can both manage Google Ads through an MCP (Model Context Protocol) server in 2026. Claude offers the broader, established connector path across Claude Web, Desktop, and Code. Gemini CLI supports MCP directly, while custom MCP apps in the Gemini web app are currently limited to eligible personal-account users in the United States, in English, inside Spark tasks.
The practical choice is therefore about client availability and workflow, not whether one model can reach MCP at all. Both can call the same NotFair tools when the chosen client exposes remote MCP and completes OAuth.
Where Claude is the simpler default
- Audit accounts in natural language — "audit my account, find wasted spend" runs ~20 parallel GAQL queries through NotFair and returns a ranked action list.
- Apply changes — pause keywords, add negatives, update bids, edit RSAs, change budgets, with server-side approval gates on destructive writes.
- Query change history — "what changed last Tuesday?" pulls Google Ads change events and correlates with spend movements.
- Connect once, use everywhere — Claude Desktop, claude.ai, Claude Code, Claude Cowork, and the Claude API all use the same NotFair OAuth.
- Operate alongside ChatGPT — same NotFair connection powers ChatGPT via Codex, so Claude's setup isn't a lock-in.
Where Gemini fits now
- Multimodal — Gemini handles images, audio, and video natively. Useful for creative review and ad asset analysis pasted into the chat.
- Workspace integration — deep ties into Gmail, Docs, Sheets, and the broader Google Workspace surface area.
- Gemini CLI — direct MCP support for technical, terminal-based workflows.
- Gemini web app — custom MCP apps inside Spark tasks for eligible personal US accounts using English.
MCP gives both clients the same Google Ads surface
MCP is the open standard that lets AI clients call external tools. Once Claude or Gemini connects to NotFair, both see the same 120 Google Ads tools and the same server-side authentication, account routing, write approvals, provenance, and reversal metadata.
The remaining difference is the client shell: Claude's connector availability is broader, while Gemini's web-app custom MCP surface has eligibility constraints. Gemini CLI is the direct option for users who already work in the terminal.
Gemini MCP availability today
Gemini CLI supports MCP now. Google's custom-app support in the Gemini web app is available only to eligible personal-account users in the United States, in English, and inside Spark tasks. Workspace and other users should verify current availability in Google's help documentation before relying on the web flow.
What we'd recommend today
- Lowest-friction broad availability — Claude + NotFair through Claude Web, Desktop, or Code.
- Already in ChatGPT — ChatGPT + NotFair via Codex gets you the same capability. Same auth, different assistant.
- Gemini-first terminal workflow — Gemini CLI + NotFair through MCP.
- Gemini web workflow — use a custom MCP app in Spark if your account is eligible; otherwise choose the CLI or another client.
You: My Search campaign CPA jumped 40% last week. Find why.
Claude: Pulled change history + spend + search terms in parallel. Two changes Tuesday: bid strategy switched from tCPA to Maximize Conversions, and a brand negative list was unlinked. The negative list change opened spend on "free [brand]" — 38% of last week's incremental cost, zero conversions. Want me to relink the negative list?
FAQ
Move from article to live account work
Connect your account first, then use an MCP client to turn the article workflow into a reviewed account action.