Supertone TTS
PYPI · SUPERTONE-MCP · SCANNED SEP 21
Composable Supertone TTS toolkit: synthesis, voice search/preview/clone, usage — 31 languages
Available components
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security50
- Malware scan not yet available for this package.Unverified
- No known CVEs affecting this package version or its production dependencies.Pass
- Runs hatchling.build at install time, a recognised native-build step with no shell scripting around it. View diagnostics → Pass
- 1 of 33 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency45
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 96 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability73
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1441 tokens (~102/item across 14 items; 14 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management87
- Stability observed for 26 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage73
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 6% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 2 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "delete_custom_voice" implies "delete" and declares no destructiveHint at all, which the MCP spec reads as destructive by default. See how to fix → Fail
- An AI judge read all 14 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the Supertone TTS MCP server?
Supertone TTS runs locally as a PyPI package, launched with uvx supertone-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
pypi · supertone-mcp
claude mcp add supertone-inc-supertone-mcp -- uvx supertone-mcp
{
"mcpServers": {
"supertone-inc-supertone-mcp": {
"command": "uvx",
"args": [
"supertone-mcp"
]
}
}
} {
"servers": {
"supertone-inc-supertone-mcp": {
"command": "uvx",
"args": [
"supertone-mcp"
]
}
}
} codex mcp add supertone-inc-supertone-mcp -- uvx supertone-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"supertone-inc-supertone-mcp": {
"type": "local",
"command": [
"uvx",
"supertone-mcp"
],
"enabled": true
}
}
} openclaw mcp add supertone-inc-supertone-mcp --command uvx --arg supertone-mcp
mcp_servers:
supertone-inc-supertone-mcp:
command: "uvx"
args: ["supertone-mcp"] {
"McpServers": {
"supertone-inc-supertone-mcp": {
"Transport": "stdio",
"Command": "uvx",
"Arguments": [
"supertone-mcp"
]
}
}
} assistant mcp add supertone-inc-supertone-mcp -t stdio -c uvx -a supertone-mcp
{
"mcpServers": {
"supertone-inc-supertone-mcp": {
"command": "uvx",
"args": [
"supertone-mcp"
]
}
}
} Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 21 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Sept 26 −2
- Stability: pass → 0.80 functional
- 18 Sept 26 0
- Stability: 0.97 → pass security
- 16 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 14 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Sept 26 0
- Security disclosure: unverified → fail ▼ functional
- 12 Sept 26 −2
- Security disclosure: fail → unverified ▼ functional
- Stability: pass → 0.80 functional
- 11 Sept 26 0
- Stability: 0.97 → pass security
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 21 Sept 2026 · Analysed pypi/supertone-mcp@0.3.1
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | pypi |
Background: How many MCP packages publish verified provenance →
Install scripts 1 script
| Hook | Tier | Command |
|---|---|---|
| build_backend | allowlisted | hatchling.build |
Background: Why install scripts are a supply-chain risk →
Dependencies 33 packages
| Packages resolved | 33 |
|---|---|
| No linked repository | 1 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
clone_voice ~82
Create a custom voice from a single local audio file. Constraints: WAV or MP3 only, max 3MB, exactly one file. The returned voice_id can be used immediately in text_to_speech. Path supports ~ expansion (e.g., "~/sample.wav").
| Name | Type | Req | Description |
|---|---|---|---|
| audio_path | string | yes | – |
| description | – | – | – |
| name | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
delete_custom_voice ~61
Permanently delete a custom (cloned) voice. THIS IS IRREVERSIBLE — once deleted, the voice cannot be recovered and any saved voice_id referencing it will stop working. Confirm with the user before calling.
| Name | Type | Req | Description |
|---|---|---|---|
| voice_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
edit_custom_voice ~50
Update the name and/or description of an existing custom voice. At least one of name or description must be provided.
| Name | Type | Req | Description |
|---|---|---|---|
| description | – | – | – |
| name | – | – | – |
| voice_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
get_credit_balance ~38
Returns the remaining Supertone credit balance for the current API key. Use this before long TTS calls to confirm you have enough characters left.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
get_custom_voice ~55
Fetch the detail of a single custom (cloned) voice by voice_id. Returns the voice's name and description. Use search_custom_voice to list custom voices and find a voice_id.
| Name | Type | Req | Description |
|---|---|---|---|
| voice_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
get_usage_history ~76
Retrieve recent TTS API usage history for the current API key. Returns a plain-text summary broken down by time period, showing the minutes used (and, when available, the voice and model) in each period. Takes no parameters — it reports usage over a recent default window. Use this to review how much synthesis has been consumed.
Input schema present but exposes no named parameters.
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
get_voice ~64
Fetch full detail for a single voice by voice_id. Returns name, description, age, gender, use_cases, languages, styles, supported models, sample count, and thumbnail URL. Use preview_voice to get the actual sample audio URLs.
| Name | Type | Req | Description |
|---|---|---|---|
| voice_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
get_voice_usage ~60
Retrieve recent usage for a single voice by voice_id. Returns a plain-text summary of the voice's per-day minutes used over a recent default window. Use search_voice or search_custom_voice to find a voice_id.
| Name | Type | Req | Description |
|---|---|---|---|
| voice_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
merge_audio_files ~132
Merge two or more local audio files into a single file using ffmpeg. Supports plain concatenation, silence-gap insertion between clips (gap_ms), or crossfade blending (crossfade_ms). gap_ms and crossfade_ms are mutually exclusive. Output format is auto-detected from the inputs (all-same-ext -> that ext; mixed -> mp3) or overridden via output_format. Use this to stitch multiple text_to_speech outputs into one deliverable.
| Name | Type | Req | Description |
|---|---|---|---|
| crossfade_ms | integer | – | – |
| gap_ms | integer | – | – |
| input_paths | array | yes | – |
| output_format | – | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
predict_duration ~132
Predict the expected output audio duration in seconds for a given text WITHOUT producing any audio file. Accepts the same parameters as text_to_speech. There is no text-length limit: long text is automatically split (auto-chunked), and credit usage and latency scale with the length of the text. Use this to estimate credit cost before synthesizing — credit usage is proportional to the predicted duration.
| Name | Type | Req | Description |
|---|---|---|---|
| language | – | – | – |
| model | – | – | – |
| output_format | – | – | – |
| pitch_shift | – | – | – |
| speed | – | – | – |
| style | – | – | – |
| text | string | yes | – |
| voice_id | – | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
preview_voice ~78
Fetch sample audio URLs for a voice. Optionally filter samples by language, style, and model. Returns one URL per matching sample. v0.2 does NOT play the audio locally; pass the URL to your client to listen.
| Name | Type | Req | Description |
|---|---|---|---|
| language | – | – | – |
| model | – | – | – |
| style | – | – | – |
| voice_id | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
search_custom_voice ~56
List custom (cloned) voices created by this API key. Optional name and description filters perform partial matching. Pagination is handled internally; v0.2 returns the SDK default page.
| Name | Type | Req | Description |
|---|---|---|---|
| description | – | – | – |
| name | – | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
search_voice ~127
Search the Supertone voice catalog. Filters are optional and combined with AND semantics: name, description, language, gender, age, use_case, style, model. With no filters, returns the full catalog (the v0.1 list_voices behavior). The output is a numbered plain-text list; when any filter is set, the first line shows "Filters applied: ...".
| Name | Type | Req | Description |
|---|---|---|---|
| age | – | – | – |
| description | – | – | – |
| gender | – | – | – |
| language | – | – | – |
| model | – | – | – |
| name | – | – | – |
| style | – | – | – |
| use_case | – | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | string | yes | – |
No examples provided.
text_to_speech ~430
Generate natural-sounding speech audio from text. Use this when the user wants to: hear text read aloud, create narration or voiceover, generate voice audio, preview how text sounds when spoken, or convert any writing into spoken audio. Supports 31 languages including Korean, English, and Japanese. There is no text-length limit: long text is automatically split (auto-chunked) by the service, and credit usage and latency scale with the length of the text. Set output_mode ('files', 'resources', or 'both') to control how audio is returned, and autoplay=true to play it back on macOS. These per-call parameters REPLACE the removed SUPERTONE_MCP_OUTPUT_MODE and SUPERTONE_MCP_AUTOPLAY environment variables; autoplay now defaults to false. A default voice is already configured -- just call this tool directly. Only call search_voice if the user explicitly asks to change or browse voices.
| Name | Type | Req | Description |
|---|---|---|---|
| autoplay | boolean | – | – |
| include_phonemes | boolean | – | When true, request phoneme timing data alongside the audio (SDK 0.2.3). Defaults to false. Note: the phoneme data is not yet surfaced in the tool response — this is a pass-through flag for now. |
| language | – | – | – |
| model | – | – | – |
| normalized_text | – | – | Optional pre-normalized text to use for synthesis (SDK 0.2.3). Only applies to the sona_speech_2 and sona_speech_2_flash models; other models ignore it. When omitted, the SDK default (None) is used. |
| output_format | – | – | – |
| output_mode | – | – | – |
| pitch_shift | – | – | – |
| speed | – | – | – |
| streaming | boolean | – | When true, stream the audio via the chunked synthesize path instead of a single one-shot request. Streaming is ONLY supported by model=sona_speech_1; using streaming=true with any other model returns… |
| style | – | – | – |
| text | string | yes | – |
| voice_id | – | – | – |
| Name | Type | Req | Description |
|---|---|---|---|
| result | – | yes | – |
No examples provided.
What is the Supertone TTS MCP server?
Supertone TTS is an MCP server listed in the public MCP registry as io.github.supertone-inc/supertone-mcp. Composable Supertone TTS toolkit: synthesis, voice search/preview/clone, usage, 31 languages. This page covers its PyPI package (supertone-mcp).
Is the Supertone TTS MCP server safe to use?
Supertone TTS scores 64 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 21 September 2026. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Supertone TTS MCP server expose?
Supertone TTS exposes 14 tools: text_to_speech, search_voice, get_voice, get_credit_balance, preview_voice, and 9 more. Their descriptions and schemas cost roughly 1,441 tokens of context every time the server is loaded.
Is the Supertone TTS MCP server still maintained?
Supertone TTS is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the Supertone TTS MCP server under?
Supertone TTS declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.