# SubKiller

> Free MCP connector that helps a person find the subscriptions they pay for, cancel the ones they do not want, and confirm the charges stopped. The assistant reads the person's inbox with its own email connector; SubKiller never sees email.

- MCP endpoint (HTTP, JSON-RPC, stateless, no auth): https://api.subkiller.ai/mcp
- Website: https://subkiller.ai/
- Cancel guide for people: https://subkiller.ai/cancel
- Privacy: https://subkiller.ai/privacy
- Terms: https://subkiller.ai/terms
- Contact: hello@subkiller.ai

## Tools
- start_here: Call this first 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.
- get_inbox_searches: Returns 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.
- identify_merchants: Takes 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.
- get_cancel_steps: Returns 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.
- draft_cancel_message: Returns a short, firm cancellation request the person can send from their own email, paste into a support chat, or mail as a signed letter.
- build_subscription_list: The main tool.
- save_list: 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.
- get_list: Returns the person's saved subscription list with yearly totals, and flags cancelled items that are still billing, waiting to be confirmed, or confirmed stopped.
- new_list_link: Replaces the private link to the person's saved list with a new one.
- delete_list: Permanently deletes the person's saved subscription list and everything in it.

## Rules for assistants
- Ask before you search the person's inbox, and say what you will look for: receipts and renewal notices from the last 13 months.
- Read email on your side only. Send SubKiller merchant names, amounts, billing cadence, dates and status. Never send email text, email addresses, the person's name, account numbers or card numbers. The tools reject unknown fields.
- Show the list and let the person decide keep or cancel for each item. Never decide for them.
- Before cancelling, warn when it matters: annual plans may not refund, family or team plans affect other people, and storage, hosting, domains and password managers can delete data when they lapse.
- Never send a cancellation message, click a cancel button or call anyone without the person approving that specific action first.
- Be honest about links. 'verified' means a machine check found the help page live and about cancelling on the date given. Otherwise give the steps in words and say the link was not checked. Never present a guess as the cancel page.
- Receipts from Apple, Google Play, PayPal, Paddle, FastSpring and PayPro Global name the real product inside the email. The product is the subscription; the biller is where it gets cancelled. Stripe receipts are different: Stripe only processes the card, the company is named in the subject line, and it is cancelled with that company.
- A cancellation is confirmed when the charge stops appearing, not when the vendor says so. After the next billing date, check the inbox again and update the list.
- Stopping a card payment at the bank is not cancelling. The account can keep billing and go to collections.
- Save the list with save_list and keep the list key. Tell the person their private list link once, and tell them plainly: anyone who has the link can see the list, so it works like a password, and the list deletes itself after 12 months without an update.