UK Data: England river and tide levels MCP server
uk.co.reliness/uk-water-levelsreliness.co.ukstreamable-httpv1.5.0Scanned
Live Environment Agency river levels, flows, rainfall and tide gauges across England
6 tools: 5 change things and 1 only read.
- Reads private data · 0
- Reads text others write · 6
- Can send data out · 0
- No findings
Tools listed without sign-in. Remote posture
With Anlyon
5 tools here change things. Govern them.
- Anlyon lists the tools and adopts none.
- Each tool you adopt gets approvals and receipts.
- Your agent never holds the key.
A tool your agent calls directly is not routed through Anlyon and is not governed by it. anlyon.dev only lists and labels, and these labels are the same either way.
What the UK Data: England river and tide levels MCP server can do
The UK Data: England river and tide levels MCP server is published by reliness.co.uk, a domain the MCP Registry verified. It has 6 tools. It can create or change data (5 tools: river_level_now, river_level_history, river_level_record, river_flow_now and 1 more), but cannot delete data. 1 tool only reads.
6 tools bring in text other people can write (river_level_now, river_level_history, river_stations_on_river and 3 more).
None of the fixed checks matched anything in its tool definitions. That is not a safety guarantee.
Its remote endpoint lists its tools without sign-in.
Last scanned Nov 7, 2026, version 1.5.0.
Tools
Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.
6 tools
Changes things 5Claude Code: ask
rainfall_last_24hHow much rain fell over the last 24 hours (or up to 7 days) at the nearest working Environment Agency rain gauge, in millimetres, with the wettest 15 minutes and how complete the r…Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it How much rain fell over the last 24 hours (or up to 7 days) at the nearest working Environment Agency rain gauge, in millimetres, with the wettest 15 minutes and how complete the record is. Observed rainfall for gardeners, farmers, groundskeepers and anyone checking "how much rain did we get". Source: Environment Agency real-time flood-monitoring API (tipping-bucket gauges). It measures one point, not your exact location, and is not a forecast. (cost: 1 credit)
Annotations the server declares
- title: rainfall last 24h
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
river_flow_nowLatest river flow in cubic metres per second (cumecs) at one gauge, or at the nearest flow gauges to a point.Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Latest river flow in cubic metres per second (cumecs) at one gauge, or at the nearest flow gauges to a point. The number kayakers, canoeists and anglers ask for. Source: Environment Agency real-time flood-monitoring API. Pass station_id for one gauge, or lat and lon to search nearby; only some gauges measure flow, and readings older than 6 hours are flagged stale. (cost: 1 credit)
Annotations the server declares
- title: river flow now
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
river_level_historyRiver level readings at one gauge since a time (default the last 24 hours, up to 7 days back), with the lowest and highest point, change since the start and whether the river is ri…Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it River level readings at one gauge since a time (default the last 24 hours, up to 7 days back), with the lowest and highest point, change since the start and whether the river is rising, falling or steady over the last hour. Answers "has the river peaked yet" for flood watchers and anglers. Source: Environment Agency real-time flood-monitoring API. The series is thinned to a manageable number of points; it is not a forecast. (cost: 1 credit)
Annotations the server declares
- title: river level history
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
river_level_nowLatest water level at one Environment Agency gauge, compared with its typical range (low, normal or high), plus the latest flow where the gauge measures it.Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Latest water level at one Environment Agency gauge, compared with its typical range (low, normal or high), plus the latest flow where the gauge measures it. Useful for boaters, anglers and residents asking whether the river is high right now. Source: Environment Agency real-time flood-monitoring API; readings are usually 15 minutes apart and old readings are flagged stale. Level is a gauge height, not water depth, and this is not a flood warning service. (cost: 1 credit)
Annotations the server declares
- title: river level now
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
river_level_recordRecord high, record low and highest recent level at one Environment Agency gauge, with how far today's level is below the record.Reads text others writeNo 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.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Record high, record low and highest recent level at one Environment Agency gauge, with how far today's level is below the record. Answers "is this a record flood" for journalists, residents and property buyers. Source: Environment Agency real-time flood-monitoring API (station stage scale). Records only cover the years the gauge has operated, and some gauges publish none. (cost: 1 credit)
Annotations the server declares
- title: river level record
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: true
Only reads 1Show 1 read-only tool
river_stations_on_riverLists the Environment Agency level gauges on a named river in England (for example River Thames or River Severn) with station ids, towns and coordinates.Reads text others writeNo findings
Why it is in this group
- The description's first verb is "list": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it Lists the Environment Agency level gauges on a named river in England (for example River Thames or River Severn) with station ids, towns and coordinates. Useful for boaters planning a trip or anyone following a river downstream. Source: Environment Agency real-time flood-monitoring API. The upstream name match is exact, so if nothing matches the tool retries once as "River <Name>" in title case (e.g. "thames" becomes "River Thames") and reports the name it used; other spellings are not guessed, and the list is not in upstream-to-downstream order. (cost: 1 credit)
Annotations the server declares
- title: river stations on river
- 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.
Exfil surface
Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.
No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.
- Reads private data0
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write6
- Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
- Can send data out0
- Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.
Remote posture
What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.
Looked at Nov 14, 2026, 12:24 UTC, unchanged since Nov 7, 2026. No credentials were sent and no tool was called. What is looked at.
- Reachable
- yes
- HTTP status of an anonymous initialize
- 200
- tools/list served without credentials
- yes
- Tools that change things, listed without credentials
- 5
- Protocol version
- 2025-06-18
- WWW-Authenticate on 401
- not observed
- resource_metadata in WWW-Authenticate
- not observed
- RFC 9728 protected resource metadata
- not observed
- Authorization servers
- not observed
- Legacy HTTP+SSE transport
- no
- Dynamic client registration
- not observed
- Client ID metadata documents
- not observed
- WarnThe whole server
The endpoint served tools/list without credentials, and the list has 5 tools that change things (5 write). Whether a call also works without credentials was not tested: tools are never called.
What this check looks forMatched text
https://ukdata.reliness.co.uk/mcp/uk-water-levels: tools/list returned 6 tools to an anonymous client, including river_level_now (write), river_level_history (write), river_level_record (write), river_flow_now (write), rainfall_last_24h (write)
Findings
Matches of fixed checks, with the text they matched.
No check matched anything in these tool definitions. That is not a safety guarantee.
History
Changes to its tool definitions and to its remote endpoint, newest first.
No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.
Install
Pinned to version 1.5.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http uk-water-levels https://ukdata.reliness.co.uk/mcp/uk-water-levelsclaude mcp add --transport http uk-water-levels https://ukdata.reliness.co.uk/mcp/uk-water-levelsRun in a terminal.
Claude Code permissions
Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.
{
"permissions": {
"allow": [
"mcp__uk-water-levels__river_stations_on_river"
],
"ask": [
"mcp__uk-water-levels__river_level_now",
"mcp__uk-water-levels__river_level_history",
"mcp__uk-water-levels__river_level_record",
"mcp__uk-water-levels__river_flow_now",
"mcp__uk-water-levels__rainfall_last_24h"
],
"deny": []
}
}Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as uk-water-levels. Review it before you use it.
Capability tags behind 6 rules
- mcp__uk-water-levels__river_level_now untrusted-input
- mcp__uk-water-levels__river_level_history untrusted-input
- mcp__uk-water-levels__river_stations_on_river untrusted-input
- mcp__uk-water-levels__river_level_record untrusted-input
- mcp__uk-water-levels__river_flow_now untrusted-input
- mcp__uk-water-levels__rainfall_last_24h untrusted-input
Pin
Keep the decision: fail CI when the tools change, follow every change, or show a badge.
Pin in CI
Fail a build when the tools you reviewed are not the tools the server serves today.
curl -s "https://anlyon.dev/api/v1/servers/uk.co.reliness/uk-water-levels/verify?hash=19e4ad1fae529de88f7ee3a6bc3f39a86e2230763c6a217c209cae8e480af8ea" | jq -e '.changed == false'Pinned hash 19e4ad1fae52, from Nov 7, 2026, 00:18 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/uk.co.reliness/uk-water-levels/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/uk.co.reliness/uk-water-levels)Source: MCP Registry. Synced Nov 7, 2026, 00:18 UTC.
UK Data: England river and tide levels MCP server: questions and answers
Answered from the scan above, not from the publisher's description.
Is the UK Data: England river and tide levels MCP server safe?
- No scan can promise that. What its definitions show: 6 tools, 5 of which can change, send or delete something, and 0 findings from fixed checks. Allow the reads, ask before each change, and deny the deletes; the permissions block on this page does that.
Can the UK Data: England river and tide levels MCP server delete data?
- No tool is classed as destructive: going by their definitions, none of them deletes, cancels or revokes anything.
Can the UK Data: England river and tide levels MCP server do things that cannot be undone?
- No tool is classed as irreversible: none of them sends, pays, publishes or merges, going by their definitions.
What tools does the UK Data: England river and tide levels MCP server have?
- 6 tools: 5 write, 1 read. river_level_now, river_level_history, river_level_record, river_flow_now, rainfall_last_24h and river_stations_on_river.
Does the UK Data: England river and tide levels MCP server need sign-in or OAuth?
- Its remote endpoint listed its tools to an anonymous client, without sign-in.
Does the UK Data: England river and tide levels MCP server send data to outside services?
- None of its tools sends, posts or publishes, or takes a recipient, channel or URL.
Has the UK Data: England river and tide levels MCP server changed its tools?
- Not since anlyon.dev started tracking it. Last scanned Nov 7, 2026.