Free Google Ads and PPC calculators for ad copy limits, ROAS, CPC, budgets and wasted spend.
Connects to free SpendCanary tools for Google Ads and Meta ads. Muse can check ad copy against character limits and rejection rules, work out ROAS, CPC, CPM and break-even margins, see the most a daily budget can be charged, total wasted spend from a search terms CSV, and test a landing page on phone and desktop.
Try asking Muse: "Check my Google responsive search ad headlines against the character limits and tell me which ones might get rejected."
Source: Found in the official MCP Registry (com.spendcanary/free-tools) · First listed November 15, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 4 h ago.
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://spendcanary.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
SpendCanary is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
In Claude, open Settings, then Connectors.
Choose Add custom connector, give it a name, and paste the link.
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://spendcanary.com/mcpResponse time at the last check: 268ms. Worked in n/a of checks over 30 days.
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
check_ad_copyChecks Google responsive search ad or Meta ad text against character limits and common rejection reasons (symbols, capitals, repeated text, claims). Returns issues per line: fix (likely rejected or cut off) or look (worth a second look).daily_budget_max_spendThe most Google Ads can charge in one day (2× the average daily budget) and in a month (30.4×) for a campaign daily budget.roasReturn on ad spend from sales and ad spend, plus the break-even ROAS and profit for a profit margin.cpcCost per click from spend and clicks, or clicks from spend and cost per click (any two of the three), plus CPM and click-through rate from impressions.search_partners_costCompares cost per conversion on Google Search with the Search Partners network and estimates what partners cost a month beyond Search, using the same rule as the SpendCanary scan.wasted_spend_from_search_termsReads a Google Ads search terms report (CSV text) and totals the spend on search terms with no conversions, with the costliest ones and a monthly figure.check_landing_pageLoads a public landing page on a phone and a computer and checks speed, redirects, a way to call, book or buy, and the Google tag. Limited to 5 checks an hour.https://spendcanary.com/mcpNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use SpendCanary to help me. It is a free service with an MCP server at https://spendcanary.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
At the last check (November 15, 2026, 14:46 UTC) the endpoint was working, answering in 268ms. It is checked every 15 minutes.
It was screened on November 15, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
It exposes 7 tools, including check_ad_copy, daily_budget_max_spend, roas, cpc. For example, you could ask Muse: "Check my Google responsive search ad headlines against the character limits and tell me which ones might get rejected."
This listing was added from public sources (Found in the official MCP Registry (com.spendcanary/free-tools)). If you build SpendCanary, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
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