Run your entire client roster from one chat — MCC-safe, with an approval gate on every change
Opus Growth is a hosted MCP connector built for agencies and freelancers who manage many ad accounts. Paste one URL into Claude or ChatGPT, sign in with Google, and your assistant can work across every client account you approve — Google Ads, Microsoft Advertising, TikTok Ads and LinkedIn Ads — with login-customer-id handled correctly on every call, per-client isolation, audit logging, and a dry-run preview before anything is applied. The Agency plan is $99.99/month with unlimited actions and MCC support.
https://mcp.opus-growth.comWhat you can do
MCC-safe: the right login-customer-id on every call
Manager account structures are where most agency tooling quietly breaks. Opus Growth sends the correct login-customer-id with every Google Ads request, so you connect once at the MCC level and reach every client account you approved — no separate OAuth per client, no "customer not found" on the third account, no re-authorizing halfway through a review. List your accounts, name a customer ID, keep working.
Switch clients mid-conversation, across platforms
Ask about client A's Google Ads, then say "now client B's LinkedIn" and the thread carries on. One connection covers Google Ads (69 tools), Microsoft Advertising (30), TikTok Ads (25, including every advertiser under your Business Centers) and LinkedIn Ads (18). A Monday portfolio review that used to mean fifteen logins becomes one conversation.
Approval gates: nothing lands on a client account unseen
Every write is prepared as a dry run first — the account, the entity, the current value, the proposed value — and it is sent to the platform only after you say yes. New campaigns and ad groups are created paused on multiple platforms and budget increases are capped, so even an approved bulk change cannot start spending a client's money on its own.
Audit logging and change history you can show a client
Applied actions are written to an audit log under per-client isolation, and Google Ads change history is available as its own tool. "What happened to this account on the 14th, and who did it?" becomes a question with an answer — whether the change came from your team, from the client, or from a platform auto-apply. On accounts you inherit from another agency, that is the first thing worth running.
Unlimited actions on Agency — one flat $99.99/month
Roster work is bulk work: twenty search-terms audits, forty budget edits, a few hundred negatives. Pro at $49.99/month and 5,000 actions fits a freelancer with a couple of accounts; the Agency plan at $99.99/month removes the ceiling entirely and adds MCC and multi-account access. Your cost stops scaling with how thorough you are.
Client reporting from paid, analytics and organic in one pass
Pull paid performance from Google Ads, Microsoft Advertising, TikTok and LinkedIn, then add GA4 (10 tools), Search Console (6) and YouTube (5) for the organic picture, and use Google Tag Manager (18 tools) to verify the tracking behind the numbers. Reporting night turns into one prompt per client.
Set it up in 60 seconds
- 1
Add the connector to Claude or ChatGPT
In Claude (claude.ai or Claude Desktop) open Settings → Connectors → Add custom connector and paste https://mcp.opus-growth.com. In ChatGPT, enable developer mode and add the same URL. There is nothing to install, self-host or maintain, and no API keys or developer tokens to apply for.
- 2
Sign in with Google and pick the client accounts
Hosted OAuth handles authorization. Sign in with Google, connect your ad platforms, and select which accounts — including manager/MCC hierarchies and TikTok Business Center rosters — your assistant may work with. Access stays scoped to exactly the accounts you approved. Setup takes about 60 seconds.
- 3
Start asking in plain language
Ask for a cross-account performance roll-up, a wasted-spend audit on one client, or a batch of budget changes. Reads return instantly; every write comes back as a preview you approve first. The 7-day trial includes 50 actions and asks for no card.
Ask in plain English
›Across my MCC, rank every client account by spend, conversions and CPA for last week, and flag any account whose CPA rose more than 25%.
›Switch to the Northwind account, pull the last 30 days of search terms, and prepare a phrase-match negative keyword list for my approval.
›New client onboarding: run an account audit on customer ID 123-456-7890 and list every campaign with missing conversion tracking, no negatives, or a bidding strategy that does not match its goal.
›Build the monthly report for Acme: Google Ads and Microsoft Advertising spend, conversions and CPA, GA4 sessions and conversions by channel, and the top Search Console queries.
›Show me every change made in this client's Google Ads account over the last 14 days, who made it and when.
›For my three clients over budget this month, cut daily budgets by 20% and show me the before and after values per account before applying anything.
Frequently asked questions
MCP (Model Context Protocol) is the open standard AI assistants use to call real tools. Opus Growth is a hosted, remote MCP connector: you paste https://mcp.opus-growth.com into Claude or ChatGPT once, and your assistant gains 181 live tools across Google Ads, Microsoft Advertising, TikTok Ads, LinkedIn Ads, Google Tag Manager, GA4, Search Console and YouTube — out of a 221-tool catalogue that also holds the finished Meta Ads and Google Business Profile integrations, which are still waiting on platform approval. For an agency the practical effect is that the work you do per client — audits, negatives, budget edits, reporting — moves out of fifteen browser tabs and into one conversation.
Yes, natively. Opus Growth passes the correct login-customer-id on every Google Ads request, so a single connection at the manager level reaches the client accounts you authorized. You can list accounts, work in one customer ID, then move to the next without re-authorizing. MCC and multi-account access are included in the Agency plan.
Yes. Naming the client or the account ID is enough — the assistant targets that account for the next actions, then moves when you say so. The same conversation can cross platforms too: Google Ads for one client, LinkedIn for another, Microsoft Advertising for a third, without leaving the thread or reconnecting anything.
Approval gates. Every write action runs as a dry run first: the assistant shows the account, the object, the current value and the proposed value, and nothing is sent to the ad platform until you explicitly confirm. Reads run immediately. On top of that, new campaigns and ad groups are created paused on multiple platforms and budget increases are capped, so an approved change still cannot begin spending on its own.
Yes. Access is scoped to the accounts you authorized, data is isolated per customer, and applied actions are written to an audit log. Combined with the Google Ads change-history tool, you can reconstruct what changed in an account, when, and from where — which is what you need when a client asks why performance moved, or when you take over an account from a previous agency.
Agencies should take Agency at $99.99/month: unlimited actions plus MCC and multi-account support, which is the plan designed for roster work. Pro at $49.99/month includes 5,000 actions a month and suits a freelancer running one or two accounts. Yearly billing is $499.99 and $999.99. Everyone starts on a 7-day free trial with 50 actions and no credit card. Billing is in USD through Lemon Squeezy as merchant of record, and you can cancel anytime.
No. Opus Growth is hosted, including OAuth. There is no Google Ads developer token to apply for, no API keys to store, no OAuth app to register, no server to run and no ETL pipeline or data warehouse to maintain. The account manager who will use it can set it up themselves in about a minute: paste the URL, sign in with Google, pick the accounts.
Live today: Google Ads (69 tools), Microsoft Advertising (30), TikTok Ads (25) and LinkedIn Ads (18), plus Google Tag Manager (18), GA4 (10), Search Console (6) and YouTube (5) — 181 live tools on one connection, out of a 221-tool catalogue. Two integrations are finished but not live yet, and we will not pretend otherwise: Meta Ads (27 tools) is in platform review, and Google Business Profile (7 tools) is waiting on API access. Both open the moment approval lands.
Explore more
Connect your MCC and run the whole roster from one conversation. Paste https://mcp.opus-growth.com into Claude or ChatGPT, sign in with Google, and audit your first client account in under a minute — 7-day free trial, 50 actions, no card.
