SubKiller
Find every subscription you pay for and cancel the ones you do not use.
Turns subscription receipts in your inbox into one clean list, then gives cancel instructions per merchant with honest phone and in-person fallbacks. Your assistant reads the inbox; the connector never holds your email.
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First listed September 22, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: Nothing in your accounts. It gives Muse cancel steps and what to search for; Muse finds the charges in your own email.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
Who runs it: the team behind this site.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
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://api.subkiller.ai/mcpSent to Meta for approval. Until then you can add it with a link.
Also use it in ChatGPT or Claude
SubKiller is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
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.
- 4
Use it in a chat
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
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
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://api.subkiller.ai/mcpWhat you can do with SubKiller
People also do this with Muse
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 397ms. Worked in 99.2% of checks over 30 days.
Screening · November 5, 2026
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.
Tools · 10
start_hereRead only. Use when a person wants to find out what subscriptions they are paying for, cancel a subscription, stop a recurring charge, cut monthly bills, or check that something they cancelled really stopped. Returns how SubKiller works: the recommended order of steps, what each get_inbox_searchesReturns the email searches to run in the person's own inbox (Gmail or Outlook / Microsoft 365) to find subscription receipts, renewal notices, free trials about to convert, and price increases, plus how to tell a real recurring charge from a one-off purchase. You run the searchesidentify_merchantsTakes merchant names, email sender names, sender domains or card statement descriptors (for example 'NETFLIX.COM', 'APPLE.COM/BILL', 'Spotify USA') and returns who each one really is, how it is cancelled, and whether the charge is billed through an app store or payment company. Sget_cancel_stepsReturns how to cancel one subscription: the steps in plain words, things to watch for (fees, app store billing, data loss, retention offers), what proof to keep, and the company's own help page when that link has been machine-checked. For merchants it does not know, returns the gdraft_cancel_messageReturns a short, firm cancellation request the person can send from their own email, paste into a support chat, or mail as a signed letter. It asks for cancellation, written confirmation, the date billing stops, and no further charges. It has [BLANKS] that you fill in on your sidbuild_subscription_listThe main tool. Turns the messy set of charges you found in the person's inbox into a clean subscription list: what they are paying for, how often, what each costs per year, price increases, trials about to convert, subscriptions that look already stopped, possible duplicates, andsave_listWrite. Saves or updates the person's subscription list so it builds up over time: merchant name, amount, cadence, status, last charge date and cancellation date. Returns the list key, a private link to a page showing the list and yearly totals, and which cancelled items still neeget_listReturns the person's saved subscription list with yearly totals, and flags cancelled items that are still billing, waiting to be confirmed, or confirmed stopped. Call this at the start of a return visit, before searching the inbox again.new_list_linkWrite. Replaces the private link to the person's saved list with a new one. The old link and key stop working immediately and the list itself is unchanged. Use it when the person shared the link by mistake, thinks someone else has it, or just wants a fresh one. Returns the new kedelete_listSensitive write: cannot be undone. Permanently deletes the person's saved subscription list and everything in it. Use when the person asks to delete their data. Cannot be undone.Recent checks
Link
https://api.subkiller.ai/mcpPrompts for SubKiller
Questions about SubKiller in Muse
How do I connect SubKiller to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use SubKiller to help me. It is a free service with an MCP server at https://api.subkiller.ai/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.
Is SubKiller working right now?
At the last check (November 7, 2026, 01:30 UTC) the endpoint was working, answering in 397ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is SubKiller safe to connect to Muse?
It was screened on November 5, 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.
Is SubKiller free?
Yes. The connector is free to use. Your Muse plan and any account with SubKiller are separate.
What can SubKiller do in Muse?
It exposes 10 tools, including start_here, get_inbox_searches, identify_merchants, get_cancel_steps.
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