A.U.G.U.R Synapse · World

by agent.maddegen.art · remote · no sign-in to list tools · v2.2.1 · published by art.maddegen.agent

Weather, geocoding, FX rates, holidays, time zones, countries, earthquakes, sun and moon.

Final · 1Changes · 7

Compare Registry entry

8 tools: 1 do something that can't be undone and 7 change things.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things7Claude Code: ask: see these tools
Only reads0Claude Code: allow

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http synapse-world https://augur-trade.com/hub/mcp/world

Findings

Matches of fixed checks, with the text they matched.

2 warn

Warnfx_rates
The server marks "fx_rates" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The input addresses people (input.to): what it sends cannot be taken back.
What this check looks for
Warntime_convert
The server marks "time_convert" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "time_convert" says "convert": a word for a change.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

8 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

fx_ratesOfficial exchange rates for 30 major currencies (European Central Bank reference rates): latest or any date since 1999, convert an amount, or a time series.1 finding
Why it is in this group
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "fx_rates" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The input addresses people (input.to): what it sends cannot be taken back.
  What this check looks for
Description, as the server wrote it
Official exchange rates for 30 major currencies (European Central Bank reference rates): latest or any date since 1999, convert an amount, or a time series. Frankfurter API over ECB reference rates, published each working day ~16:00 CET. For crypto use crypto_price. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Currency exchange rates
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

Changes things 7Creates or changes something that can be changed back.Claude Code: ask

country_infoAny country's essentials: capital, population, GDP and GDP per capita (World Bank), currencies, languages, calling code, internet TLD, time zones, driving side, borders, flag.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Any country's essentials: capital, population, GDP and GDP per capita (World Bank), currencies, languages, calling code, internet TLD, time zones, driving side, borders, flag. Static facts from the world-countries dataset (no rate limits) plus the latest World Bank population and GDP figures. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Country facts
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
earthquakesEarthquakes worldwide from the last hour to 30 days, filtered by minimum magnitude and optionally within a radius of a place — with depth, tsunami flag and USGS alert level.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Earthquakes worldwide from the last hour to 30 days, filtered by minimum magnitude and optionally within a radius of a place — with depth, tsunami flag and USGS alert level. USGS real-time earthquake feeds (updated every minute). Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Recent earthquakes
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
geocodePlace name or address → coordinates (with city, state, country, postcode), or lat,lon → the nearest address.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Place name or address → coordinates (with city, state, country, postcode), or lat,lon → the nearest address. Up to 10 candidates. OpenStreetMap data via Photon. Returns OSM links so results can be checked. When to use: To turn names into coordinates; weather and sun_moon accept place names directly. Price: $0.001 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Geocode / reverse geocode
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
holidaysPublic holidays for 100+ countries for any year, whether today is a holiday there, and the next upcoming ones — including regional (state) holidays.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Public holidays for 100+ countries for any year, whether today is a holiday there, and the next upcoming ones — including regional (state) holidays. Nager.Date open holiday data. Use for scheduling, market-closure awareness or delivery estimates. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Public holidays
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
sun_moonSunrise, sunset, golden hour, twilight, day length and solar noon for any place and date — plus moon phase, illumination, moonrise and moonset.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Sunrise, sunset, golden hour, twilight, day length and solar noon for any place and date — plus moon phase, illumination, moonrise and moonset. Astronomical calculation (SunCalc), exact and instant. Pass tz for local times. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Sunrise, sunset + moon
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
time_convertCurrent time in any time zones, convert a time between zones (DST-correct), and date arithmetic: add/subtract durations, days between dates, weekday, ISO week, Unix time.1 finding
Why it is in this group
- The name "time_convert" says "convert": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "time_convert" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "time_convert" says "convert": a word for a change.
  What this check looks for
Description, as the server wrote it
Current time in any time zones, convert a time between zones (DST-correct), and date arithmetic: add/subtract durations, days between dates, weekday, ISO week, Unix time. Computed locally from the IANA time-zone database — no rate limits, exact. Zones are IANA names (America/New_York, Asia/Tokyo, UTC). Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Time zones + date math
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
weatherCurrent weather and hourly/daily forecast for any place name or lat,lon: temperature, feels-like, wind, gusts, rain, cloud, humidity, UV — up to 9 days.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Current weather and hourly/daily forecast for any place name or lat,lon: temperature, feels-like, wind, gusts, rain, cloud, humidity, UV — up to 9 days. Forecast from the Norwegian Meteorological Institute (MET Norway), the same model data yr.no uses, worldwide. Place names are geocoded with OpenStreetMap. Times are UTC plus local time when tz is given (IANA, e.g. Australia/Sydney). Price: $0.001 per call (10 free/day; after that a payment-required result lists x402 options). Errors: returns isError with a message for invalid input or an upstream failure (not charged).
Annotations the server declares
- title: Weather now + forecast
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 2.2.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http synapse-world https://augur-trade.com/hub/mcp/world

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__synapse-world__weather",
      "mcp__synapse-world__geocode",
      "mcp__synapse-world__fx_rates",
      "mcp__synapse-world__holidays",
      "mcp__synapse-world__time_convert",
      "mcp__synapse-world__country_info",
      "mcp__synapse-world__earthquakes",
      "mcp__synapse-world__sun_moon"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as synapse-world. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/art.maddegen.agent/synapse-world/changes.xml

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Anlyon alternative

8 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry. Synced Oct 21, 2026, 17:45 UTC.

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