PayCheck
Verify merchant trust before paying to reduce fraud and scams.
Scores the trustworthiness of merchant domains, URLs, and crypto wallets before Muse initiates a payment. Returns a deterministic trust verdict without sending money or accessing wallet keys. Helps prevent checkout fraud.
Try asking Muse: "Before I pay this invoice, check if the merchant domain is legitimate."
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Source: Found in the official MCP Registry (io.github.toolweather/paycheck) · First listed October 29, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 3 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://paycheck.toolweather.workers.dev/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
PayCheck 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://paycheck.toolweather.workers.dev/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 48ms. Worked in n/a of checks over 30 days.
Screening · October 29, 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 · 3
check_merchantDecide whether an autonomous agent should pay a merchant, host, or wallet. PayCheck returns a deterministic trust score for one target. It does not send money, does not sign transactions, and does not hold wallet keys. Use this immediately before a payment, a checkout redirect, oget_quotaShow how many free PayCheck merchant checks the current caller has left for the current UTC day. Use this before a batch of check_merchant calls, or after an HTTP 402, to read the remaining free allowance and when it resets. Do not use this to score a payee. It accepts no target get_api_keyMint one free PayCheck API key. The key looks like pc_live_ followed by hex and raises the merchant-check allowance from 100 to 1,000 per UTC day. Use this once when you set up a long-running agent, then store the key and pass it on later check_merchant or get_quota calls. The plLink
https://paycheck.toolweather.workers.dev/mcpQuestions about PayCheck in Muse
How do I connect PayCheck to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use PayCheck to help me. It is a free service with an MCP server at https://paycheck.toolweather.workers.dev/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 PayCheck working right now?
At the last check (October 29, 2026, 09:11 UTC) the endpoint was working, answering in 48ms. It is checked every 15 minutes.
Is PayCheck safe to connect to Muse?
It was screened on October 29, 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 PayCheck do in Muse?
It exposes 3 tools, including check_merchant, get_quota, get_api_key. For example, you could ask Muse: "Before I pay this invoice, check if the merchant domain is legitimate."
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This listing was added from public sources (Found in the official MCP Registry (io.github.toolweather/paycheck)). If you build PayCheck, claim it to correct the details and get your badge.
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