RevExOS
Parse invoices and POs, match them together, generate collection emails, and calculate billing math.
Extracts data from invoices and purchase orders, matches POs to invoices for three-way reconciliation, generates accounts receivable collection emails, and calculates proration, revenue recognition schedules, late payment interest, and invoice due dates.
Try asking Muse: "Generate a collection email for an overdue invoice and check if the PO matches what was billed."
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Source: Found in the official MCP Registry (com.revexos/revexos) · First listed October 28, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 1 h ago.
Is it safe to connect?
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
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://revexos.com/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
RevExOS 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://revexos.com/api/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 507ms. Worked in 100% of checks over 30 days.
Screening · October 28, 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 · 8
generate_ar_collection_emailGenerate a ready-to-send accounts receivable follow-up email for an overdue or upcoming invoice, tuned by how overdue it is (1-6) and whether to protect a long-term relationship. Requires an email address to attribute the request; RevExOS sends occasional updates about new free Aparse_invoiceExtract structured data from an invoice (PDF, PNG, JPEG, WebP or GIF, up to 10MB) at a public https URL or attached in ChatGPT: invoice number, dates, PO number, vendor and customer, currency, payment terms, subtotal, tax, total, and every line item. Also checks whether the line parse_purchase_orderExtract structured data from a purchase order (PDF or image, up to 10MB) at a public https URL or attached in ChatGPT: PO number, dates, buyer and vendor, currency, payment terms, totals and every line item with SKU, quantity and unit price. A URL must download the file directly match_po_to_invoiceCompare a purchase order with the invoice billed against it (the PO and invoice legs of a three-way match). Each file (PDF or image) is a public https URL or a file attached in ChatGPT. Returns both extracted documents plus header checks (PO number, buyer, vendor, currency) and lcalculate_prorationProrate a mid-period plan change (upgrade, downgrade, seat change): credit for the unused part of the old plan, charge for the rest of the period on the new plan, and the net amount. Method "months" (default) counts every whole month of the period equally and splits only the partbuild_revrec_scheduleBuild a month-by-month revenue recognition schedule (ASC 606 / IFRS 15 style, single performance obligation) with billed, recognized, deferred revenue and unbilled revenue per month. Models: "subscription" (equal per full month, partial first/last month by its own days, billed upcalculate_late_payment_interestSimple interest on an overdue invoice: amount x annual rate x days overdue / 365, plus a flat late fee. Mode "annual" (contract rate per year), "monthly" (rate per month, converted x12), or "uk" (UK Late Payment of Commercial Debts Act: 8% + Bank of England base rate, plus fixed calculate_invoice_due_dateWork out an invoice due date from its payment terms (due on receipt, Net 7/10/14/15/30/45/60/90, EOM, Net 30 EOM, or a custom number of days), and the date the cash actually lands after a late payment and the payment method clearing time (card 0, wire 1, ACH 2, check 7 business dRecent checks
Link
https://revexos.com/api/mcpQuestions about RevExOS in Muse
How do I connect RevExOS to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use RevExOS to help me. It is a free service with an MCP server at https://revexos.com/api/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 RevExOS working right now?
At the last check (October 29, 2026, 10:31 UTC) the endpoint was working, answering in 507ms. Over the last 7 days it answered 100% of health checks. It is checked every 15 minutes.
Is RevExOS safe to connect to Muse?
It was screened on October 28, 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.
What can RevExOS do in Muse?
It exposes 8 tools, including generate_ar_collection_email, parse_invoice, parse_purchase_order, match_po_to_invoice. For example, you could ask Muse: "Generate a collection email for an overdue invoice and check if the PO matches what was billed."
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