merona

Check an x402 seller before your agent pays: wash-adjusted settlement volume, payTo integrity, trust scores.

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What it can do

  • Payto Check: Check whether an x402 endpoint or wallet pays out where it claims to, before your agent sends funds. Takes one wallet address or endpoint URL. Returns any catalog-vs-live payout mismatch,
  • Mismatch Feed: List every x402 endpoint currently advertising one payout address while asking payers for another, from merona's nightly probe of the public catalog. Returns the current entries with ad
  • Clean Stats: Get wash-adjusted x402 settlement volume per chain — spend that survives removal of funded loops and self-dealing cycles, which can differ from raw transfer totals by orders of magnitude.

What data it sees

Do you need an account

No: the server works without sign-in

Check an x402 seller before your agent pays: wash-adjusted settlement volume, payTo integrity, trust scores. Free, no key, no signup.

How to connect

How to connect merona to Claude

The server address to paste into Claude settings:

https://merona--michaelfitz.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect merona to ChatGPT

The server address to paste into ChatGPT settings:

https://merona--michaelfitz.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect merona to Cursor

The server address to paste into Cursor settings:

https://merona--michaelfitz.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (4)

Raw names from tools/list. Only developers need these.

payto_checkCheck whether an x402 endpoint or wallet pays out where it claims to, before your agent sends funds. Takes one wallet address or endpoint URL. Returns any catalog-vs-live payout mismatch, dated payout-rotation history, and whether the address has settled on chain. Free, no key. Use mismatch_feed instead to list every known mismatch. Records are dated facts, not accusations, and no record found is not a clearance.
mismatch_feedList every x402 endpoint currently advertising one payout address while asking payers for another, from merona's nightly probe of the public catalog. Returns the current entries with advertised vs live addresses, counts and as-of dates. Takes no arguments. Free, no key. Use payto_check instead when you already have a specific address or endpoint to check.
clean_statsGet wash-adjusted x402 settlement volume per chain — spend that survives removal of funded loops and self-dealing cycles, which can differ from raw transfer totals by orders of magnitude. Returns clean settlement count, clean volume in USD and an as-of date per chain. Takes no arguments. Free, no key. These are the figures published on merona.io.
trust_scoreScore a specific seller wallet before paying it: wash-aware m.Score with an A–F grade, component breakdown, wash flags including multi-hop cycle detection, and the snapshot SHA so the result can be re-derived independently. Requires chain and address. Paid, $0.005 per call: pass payment=<base64 X-PAYMENT payload> to pay via x402, or api_key=<key>. Called without either, it returns x402 payment instructions rather than an error.