Send USPS Certified Mail letters with tracking and proof of delivery from your AI assistant.
Prepares, prints, and mails USPS Certified Mail letters with optional Electronic Return Receipt and tracking. Stores the exact document text, addresses, SHA-256 fingerprint, and delivery records. No account or upfront payment required; person reviews and authorizes before mailing.
Try asking Muse: "Send a certified letter to my landlord about a lease violation with proof of delivery."
Source: Found in the official MCP Registry (io.github.Piloxa/piloxa) · First listed September 25, 2026
Each bar is one check, every 15 minutes. Green means it answered. Last checked 5 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://piloxa.com/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Piloxa 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://piloxa.com/mcpResponse time at the last check: 500ms. Worked in 99.1% 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.
prepare_certified_letterUSE THIS WHENEVER a letter or document has to reach someone by U.S. mail, above all by Certified Mail: a demand letter, a dispute, a debt validation request, a security deposit demand, a cancellation, a notice to a landlord, tenant, contractor, HOA, insurer, employer, debt collecquote_certified_letterUse this when the person asks what it costs to send a letter by certified mail, or is weighing sending it themselves against having it sent. Says what a USPS Certified Mail letter costs, before anything is prepared. Give the number of printed pages and the service, and it returnsget_certified_letter_statusAnswers "has my letter arrived yet" for letters prepared through Piloxa IN THIS SAME CONVERSATION. Returns, for each one: who it went to, the service, the USPS tracking number once USPS has assigned one, whether USPS has accepted it, delivered it or returned it, and when each of check_certified_letterREAD ONLY: checks a draft letter or a finished document BEFORE anything is prepared, and says whether it is ready to mail by USPS Certified Mail and what it would cost. Use it when the person asks "is this ready to send?", "check this before I mail it", "did I forget anything?", searchREAD ONLY. Searches Piloxa’s public guides about USPS Certified Mail and mailing legal notices: cost, delivery time, the Electronic Return Receipt, proof of delivery and of contents, refused, unclaimed or returned mail, tracking, who can sign, demand letters, landlord, HOA, debt fetchREAD ONLY. Returns the full text of one Piloxa guide by the id search returned (or its URL), with its title, canonical URL and last-updated date when the page states one. Prices in the text are the current ones.compare_certified_mail_servicesREAD ONLY. Compares the mailing services Piloxa actually offers - what each includes, when to use it, which is the default - with the exact current all-in price of each for a page count, the first-letter promotion as conditions, and what Piloxa does not offer. Use it for "should explain_certified_mail_statusREAD ONLY. Explains a USPS tracking status ("Notice Left", "Available for Pickup", "Unclaimed", "Refused", "Return to Sender", "Insufficient Address", "Delivered, Left with Individual"...) or a Piloxa transaction state (AWAITING_APPROVAL, VENDOR_ACCEPTED, MAILED, DELIVERED...) inauthorize_certified_letterBuys and sends a letter that prepare_certified_letter prepared IN THIS CONVERSATION, after the person approved the exact total here. Call it only when (1) you have told the person the exact total, the recipient and the service, and they said yes to that total in this conversationconnect_my_lettersUse when the person wants to see, track or follow up on letters they sent with Piloxa in ANOTHER conversation, or wants their saved return address used. Returns a link and a 4-character code. Give the person both: they open the link, sign in with their email on piloxa.com, check list_my_lettersREAD ONLY. The person’s own recent Piloxa letters, from any conversation, once this chat is connected with connect_my_letters. Optional query matches the recipient’s name or company, or the start of a Piloxa reference. Returns reference, recipient name, service, status, dates andget_my_letterREAD ONLY. The current status of one of the person’s own letters by its Piloxa reference, once this chat is connected: printer acceptance, USPS acceptance, delivery or return, the return receipt, each with its source and when it was last checked, the reply-by date if the letter screate_followup_draftPrepares a NEW letter to the same recipient as one of the person’s earlier letters (by reference), from the account’s saved return address, with the follow-up text you wrote with the person. It works exactly like prepare_certified_letter and returns a new review link: nothing frohttps://piloxa.com/mcpNot in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Piloxa to help me. It is a free service with an MCP server at https://piloxa.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 13, 2026, 10:31 UTC) the endpoint was working, answering in 500ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
It was screened on September 25, 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 13 tools, including prepare_certified_letter, quote_certified_letter, get_certified_letter_status, check_certified_letter. For example, you could ask Muse: "Send a certified letter to my landlord about a lease violation with proof of delivery."
This listing was added from public sources (Found in the official MCP Registry (io.github.Piloxa/piloxa)). If you build Piloxa, claim it to correct the details and get your badge.
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