Tera Studio
co.terastudio/tera-studioterastudio.costreamable-httpv1.0.0Scanned
Find a song's key and tempo, shift it to suit your voice, then hear songs sung in your own voice.
3 tools: 2 change things and 1 only read.
- Reads private data · 1
- Reads text others write · 0
- Can send data out · 0
- 2 findings
Anlyon alternative
2 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.
Import an OpenAPI spec →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.
3 tools
Changes things 2Claude Code: ask
shift_song_keyMove a song the person has up or down by up to 6 semitones, keeping its speed, so it fits their voice, and play it back.1 finding
Why it is in this group
- The description's first verb is "move": 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 "shift_song_key" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "move": a word for a change.
Description, as the server wrote it Move a song the person has up or down by up to 6 semitones, keeping its speed, so it fits their voice, and play it back. Opens a small Tera Studio tool where they choose the file; the change happens in their browser and nothing is uploaded. Use it when a song is too high or too low for someone. Pass semitones if they said how far (negative is lower); otherwise they choose in the tool.
Annotations the server declares
- title: Change a song’s key
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
start_song_in_my_voiceExplain how to hear a song sung in the person's own voice with Tera Studio, and give them the link to start.1 finding
Why it is in this group
- The name "start_song_in_my_voice" says "start": 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 "start_song_in_my_voice" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "start_song_in_my_voice" says "start": a word for a change.
Description, as the server wrote it Explain how to hear a song sung in the person's own voice with Tera Studio, and give them the link to start. They create an account on terastudio.co, sing for about a minute, add a song they have the rights to use, and hear it back in their voice. Use it when someone wants to hear themselves sing a song, make a cover in their own voice, or turn a song into a gift in their voice. It returns steps and a link and creates nothing. Tera Studio only uses the person's own voice: not for celebrity or other people's voices.
Annotations the server declares
- title: Start a song in my own voice
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
Only reads 1Show 1 read-only tool
find_song_key_and_tempoFind the musical key (major or minor, with its relative key) and the tempo in BPM of a song file the person has.Reads private dataNo findings
Why it is in this group
- The name "find_song_key_and_tempo" says "find": a word for reading.
What it can reach
- private-dataThe description's first sentence says "find" and "file": it reads files.
Description, as the server wrote it Find the musical key (major or minor, with its relative key) and the tempo in BPM of a song file the person has. Opens a small Tera Studio tool where they choose the file; it is analysed in their browser and never uploaded. Use it when someone asks what key or BPM a song is in, or wants to know before singing, mixing or practising it. It does not search for, identify or play songs by name.
Annotations the server declares
- title: Find a song’s key and tempo
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
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 untrusted-input or outbound.
- Reads private data1
- Reads files, mail, messages, databases, secrets, calendars or repositories.
- Reads text others write0
- 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.
Findings
Matches of fixed checks, with the text they matched.
- Warnshift_song_key
The server marks "shift_song_key" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The description's first verb is "move": a word for a change.
The server marks "start_song_in_my_voice" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
What this check looks forMatched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "start_song_in_my_voice" says "start": a word for a change.
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 1.0.0. Values in angle brackets are yours to fill in.
claude mcp add --transport http tera-studio https://terastudio.co/mcpclaude mcp add --transport http tera-studio https://terastudio.co/mcpRun 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__tera-studio__find_song_key_and_tempo"
],
"ask": [
"mcp__tera-studio__shift_song_key",
"mcp__tera-studio__start_song_in_my_voice"
],
"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 tera-studio. Review it before you use it.
Capability tags behind 1 rule
- mcp__tera-studio__find_song_key_and_tempo private-data
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/co.terastudio/tera-studio/verify?hash=9c109a34d5f4bf0aeddc999216fa574b0335df143a20919d72cf210a561a5f0d" | jq -e '.changed == false'Pinned hash 9c109a34d5f4, from Oct 28, 2026, 11:17 UTC.
Watch
Get told when its tools change: a new tool, a new description, a new class.
https://anlyon.dev/servers/co.terastudio/tera-studio/changes.xmlAn Atom feed. Works in any feed reader or Slack's RSS app.
Badge
[](https://anlyon.dev/servers/co.terastudio/tera-studio)Source: MCP Registry. Synced Oct 28, 2026, 11:17 UTC.