# PayCheck Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## PayCheck

Verify merchant trust before paying to reduce fraud and scams.

- Record: https://musedirectory.ai/connector/paycheck
- Category: Shopping & Commerce
- Developer: Toolweather (https://paycheck.toolweather.workers.dev)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 167ms, checked 2026-10-29T12:46:13Z
- Endpoint: https://paycheck.toolweather.workers.dev/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-10-29T09:11:19Z)
- Source: Found in the official MCP Registry (io.github.toolweather/paycheck) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.toolweather%2Fpaycheck

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.

Example request: "Before I pay this invoice, check if the merchant domain is legitimate."

How to connect: 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.

Tools:
- check_merchant: Decide 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, o
- get_quota: Show 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_key: Mint 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 pl

Screening checks:
- MCP handshake: pass (Answered in 48ms)
- Domain against threat feeds (Cloudflare security DNS): pass (paycheck.toolweather.workers.dev not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: warn (check_merchant: Tool text tells the model to take extra steps)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 2806 days ago)
- AI review of purpose and tool behavior: pass (No concerns)