# NiceVois (remote · nicevois.com)

Free stem, lead/backing vocal, noise and reverb splitting, no account. Train and use RVC voices.

- Trust score: 86/100 (high trust)
- Change this week: +1
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- remote · `nicevois.com`: 86/100 (this document), [markdown](https://verifymcp.io/servers/com-nicevois-rvc-training/api-mcp.md), [page](https://verifymcp.io/servers/com-nicevois-rvc-training/api-mcp)

## Channel facts

- Endpoint: `https://nicevois.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.2.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-21.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 74/100
  - AI-judged instruction clarity (good).
  - Context-footprint check failed: tool/resource definitions use about 1841 tokens (~115/item across 16 items; 16 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 96/100
  - Stability check failed: schema churn in the 30 days we've observed: 0 tool removals, 1 breaking changes, 0 auth/transport breaks, 4 additions.
- **Tool Coverage**: 87/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 53% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 16 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 17 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the NiceVois MCP server?

NiceVois is a hosted endpoint at https://nicevois.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-nicevois-rvc-training 'https://nicevois.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-nicevois-rvc-training": {
      "url": "https://nicevois.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-nicevois-rvc-training": {
      "type": "http",
      "url": "https://nicevois.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-nicevois-rvc-training]
url = "https://nicevois.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-nicevois-rvc-training": {
      "type": "remote",
      "url": "https://nicevois.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-nicevois-rvc-training --url 'https://nicevois.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-nicevois-rvc-training:
    url: "https://nicevois.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-nicevois-rvc-training": {
      "Transport": "http",
      "Url": "https://nicevois.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-nicevois-rvc-training -t streamable-http -u 'https://nicevois.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-nicevois-rvc-training": {
      "type": "http",
      "url": "https://nicevois.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-21 (score 86, 0)

- [security regression] Stability: pass → fail

### 2026-09-18 (score 86, 0)

- [security regression] Tool “create_image_training_job” was removed
- [security regression] Tool “get_image_training_job” was removed
- [security regression] Tool “get_image_training_requirements” was removed
- [security regression] Tool “quote_image_training” was removed
- [security regression] Tool “start_image_training” was removed
- [security] The server rewrote its instructions, which are the text every model session reads
- [functional regression] Schema quality: pass → fail
- [functional improvement] Tool coverage: 47% → 53%
- [functional] Server version: 0.3.0 → 0.4.0
- [functional] New tool “create_free_audio_job”
- [functional] New tool “get_free_audio_job”
- [functional] New tool “list_free_audio_tools”

### 2026-09-17 (score 86, 0)

- [security] Stability: 0.97 → pass
- [security] Tool “create_image_training_job” rewrote its description, which is the text the model reads

### 2026-09-16 (score 86, +1)

No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 85, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-07 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 63 to 67. That category is still filling its 30-day observation window: 19 days of observed history at the previous scan, 20 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (16)

### `get_training_requirements` (~43 tokens)

Get RVC training requirements

Use this before training an AI voice to confirm NiceVois input formats, duration and epoch limits, consent requirements, outputs, retention, and the exact upload workflow.

Output parameters:

- `agreementUrl` (string)
- `authentication` (string)
- `consentModel` (string)
- `consentVersion` (string)
- `freeAllowance` (object)
- `maxAudioBytes` (number)
- `maxDurationSeconds` (number)
- `maxEpochs` (number)
- `minEpochs` (number)
- `outputs` (array)
- `paidTraining` (object)
- `retentionDays` (number)
- `service` (string)
- `supportedFormats` (array)
- `workflow` (array)

### `get_training_account` (~49 tokens)

Check NiceVois training balance

Call before quoting or creating a training job. Returns the connected account's welcome-credit status, available and reserved balance, balance packs, and a private browser link that keeps checkout on this same agent identity.

Output parameters:

- `accountUrl`
- `balance`
- `checkoutEnabled` (boolean)
- `freeRunMaxDurationSeconds` (integer)
- `freeRunMaxEpochs` (integer)
- `freeRuns` (object)
- `freeTraining` (boolean)
- `products` (array)
- `signedIn` (boolean)

### `quote_training` (~64 tokens)

Quote an RVC training job

Call after inspecting the audio and before creating a job. Returns the exact payable amount, current balance, welcome-credit effect, shortfall, feasibility, and the private balance-page link when more balance is needed.

Input parameters:

- `durationSeconds` (number, required)
- `epochs` (integer, required)

Output parameters:

- `accountUrl`
- `balanceAfterCents` (integer)
- `balanceBeforeCents` (integer)
- `canStart` (boolean)
- `currency` (string)
- `durationSeconds` (number)
- `epochs` (integer)
- `freeRunApplied` (boolean)
- `payableCents` (integer)
- `quotedPriceCents` (integer)
- `recommendedProduct`
- `shortfallCents` (integer)
- `subscriptionCreditAppliedCents` (integer)
- `subscriptionCreditRemainingCents` (integer)

### `create_training_job` (~202 tokens)

Create an RVC training upload

Creates a private NiceVois job and returns a one-time PUT upload URL. Do not ask for consent before the first attempt because NiceVois remembers the current standing account agreement. If the server returns CONSENT_REQUIRED, ask for one acceptance of the linked standing agreement and retry once with acceptsStandingAgreement=true. This allocates a private training slot but does not start GPU work until the audio is uploaded and start_training is called.

Input parameters:

- `acceptsStandingAgreement` (boolean): Set only when the user explicitly accepts the linked standing voice-training agreement after CONSENT_REQUIRED. Omit for accounts that have already accepted.
- `contentType` (string, required)
- `durationSeconds` (number, required)
- `epochs` (integer, required)
- `fileName` (string, required): Original WAV, MP3, FLAC, M4A, or OGG filename.
- `modelName` (string, required)
- `sizeBytes` (integer, required)
- `submissionId` (string, required)

Output parameters:

- `artifacts`
- `completedAt`
- `createdAt`
- `currentEpoch`
- `durationSeconds`
- `epochs`
- `estimatedCompletionAt`
- `estimatedRemainingSeconds`
- `etaText`
- `expiresAt`
- `id` (string)
- `links` (object)
- `message`
- `modelName`
- `startedAt`
- `status` (string)
- `updatedAt`
- `upload`

### `start_training` (~45 tokens)

Start RVC training

Use this only after the source audio was successfully PUT to the upload URL returned by create_training_job. Starts the private cloud RVC training job.

Input parameters:

- `jobId` (string, required)

Output parameters:

- `artifacts`
- `completedAt`
- `createdAt`
- `currentEpoch`
- `durationSeconds`
- `epochs`
- `estimatedCompletionAt`
- `estimatedRemainingSeconds`
- `etaText`
- `expiresAt`
- `id` (string)
- `links` (object)
- `message`
- `modelName`
- `startedAt`
- `status` (string)
- `updatedAt`
- `upload`

### `get_training_job` (~55 tokens)

Check an RVC training job

Use this to check truthful stage, completed epochs, ETA, and artifact readiness for one private NiceVois training job. Poll reasonably; do not call more often than every 15 seconds.

Input parameters:

- `jobId` (string, required)

Output parameters:

- `artifacts`
- `completedAt`
- `createdAt`
- `currentEpoch`
- `durationSeconds`
- `epochs`
- `estimatedCompletionAt`
- `estimatedRemainingSeconds`
- `etaText`
- `expiresAt`
- `id` (string)
- `links` (object)
- `message`
- `modelName`
- `startedAt`
- `status` (string)
- `updatedAt`
- `upload`

### `list_training_jobs` (~32 tokens)

List private RVC training jobs

Use this to find the authenticated user's recent NiceVois jobs before asking for a job ID they may not know.

Output parameters:

- `jobs` (array)
- `retentionDays`

### `get_conversion_requirements` (~58 tokens)

Get RVC voice conversion requirements

Use this when a user wants to convert vocals with RVC or compare a normal RVC result with NiceVois cleaned consonants and breaths. Returns the real input formats, model choices, workflow, current free-beta policy, and outputs.

Output parameters:

- `authentication` (string)
- `modelInputs` (array)
- `outputs` (array)
- `pricing` (object)
- `service` (string)
- `sourceAudioFormats` (array)
- `transposeSemitones` (object)
- `wholeSongCover` (object)
- `workflow` (array)

### `list_voice_models` (~49 tokens)

List private RVC voice models

Use this when the user wants to convert audio and you need to select one of their private NiceVois-trained or uploaded RVC voices. Do not ask for a model ID before calling this tool.

Output parameters:

- `allowance`
- `billing`
- `dailyLimit`
- `models` (array)
- `usedToday` (integer)

### `create_voice_model_import` (~87 tokens)

Prepare a private RVC model upload

Use this when the user wants to convert with an existing private RVC .pth file or complete model ZIP instead of a voice trained in their NiceVois library. Returns a one-time PUT upload instruction. After uploading, call list_voice_models to select the imported voice.

Input parameters:

- `fileName` (string, required): Original .pth or .zip filename.
- `sizeBytes` (integer, required)

Output parameters:

- `id` (string)
- `status` (string)
- `upload` (object)

### `create_voice_conversion` (~191 tokens)

Create an RVC vocal conversion

Use this when the user has selected a private voice model and wants to convert one vocal recording. Returns a private upload instruction. Upload only the source vocal, then call get_voice_conversion with the same conversion ID.

Input parameters:

- `durationSeconds` (number, required): Measured duration of the source audio in seconds. NiceVois uses this to verify that the account can download the result before cloud work.
- `fileName` (string, required): Original WAV, MP3, FLAC, M4A, or OGG vocal filename.
- `modelId` (string, required): The id returned by list_voice_models.
- `sizeBytes` (integer): Exact byte size of the source audio. Supply it whenever the client can measure the file so interrupted uploads are verifiable and safely resumable.
- `transpose` (integer): Pitch shift in semitones, from -24 through 24. Use 0 when no shift was requested.

Output parameters:

- `createdAt`
- `error`
- `fileName`
- `id` (string)
- `modelName`
- `outputs`
- `providerState`
- `restoration`
- `stage`
- `stageMessage`
- `status` (string)
- `timings`
- `transpose`
- `upload`

### `get_voice_conversion` (~71 tokens)

Check an RVC vocal conversion

Use this when checking one private NiceVois conversion. Poll no more than once every 10 seconds. Report the returned stage without inventing progress. When complete, present the NiceVois cleaned version first and use download_voice_conversion_output for the version the user requests.

Input parameters:

- `conversionId` (string, required)

Output parameters:

- `createdAt`
- `error`
- `fileName`
- `id` (string)
- `modelName`
- `outputs`
- `providerState`
- `restoration`
- `stage`
- `stageMessage`
- `status` (string)
- `timings`
- `transpose`
- `upload`

### `download_voice_conversion_output` (~119 tokens)

Download a completed voice conversion

Use after get_voice_conversion says the job is complete and the user wants the cleaned or standard output. Each download uses the source audio's duration from the account's conversion-download minutes. If the exact file was downloaded before, ask before retrying and then set confirmRepeat true.

Input parameters:

- `confirmRepeat` (boolean): Only true after the user explicitly confirms downloading the same artifact again.
- `conversionId` (string, required)
- `eventId` (string)
- `kind` (string, required): Prefer cleaned unless the user specifically asks for standard RVC.

Output parameters:

- `accepted` (boolean)
- `downloadCount` (integer)
- `downloadUrl` (string)
- `secondsCharged` (integer)

### `list_free_audio_tools` (~89 tokens)

List the free NiceVois audio tools

Use this to see NiceVois's free audio tools (no account needed): split a song into vocals and instrumental (vocal remover, acapella, karaoke instrumental), split lead vocals from backing vocals, remove background noise, and remove reverb or echo. Returns each tool's id, the accepted formats, and a website link to give the user when you cannot upload their file yourself.

Output parameters:

- `accountRequired` (boolean)
- `inputFormats` (array)
- `maxAudioBytes` (integer)
- `noFileAccess` (string)
- `outputFormats` (array)
- `price` (string)
- `service` (string)
- `tools` (array)
- `workflow` (array)

### `create_free_audio_job` (~263 tokens)

Split or clean up audio for free

Use this when the user wants to split a song into stems (vocals and instrumental), isolate or remove vocals, make an acapella or a karaoke instrumental, split the lead vocal from the backing vocals, or remove background noise or reverb from a recording. Free, no account. Returns a one-time upload URL: PUT the file's bytes to it, then call get_free_audio_job with the returned id.

Input parameters:

- `durationSeconds` (number): The audio's length in seconds, if you can measure it. NiceVois measures the file itself after upload, so leave this out rather than guess.
- `fileName` (string, required): The audio file's name with its extension: WAV, MP3, FLAC, M4A or OGG.
- `outputFormat` (string): Format of the files you get back. Use wav unless the user asks for another.
- `sizeBytes` (integer, required): The file's exact size in bytes.
- `tool` (string, required): split_stems: vocals and instrumental. split_lead_backing: lead vocal, backing vocals, instrumental, and the instrumental with backing vocals. remove_noise: background noise out of a voice recording.…

Output parameters:

- `createdAt`
- `durationSeconds`
- `error`
- `fileName`
- `id` (string)
- `links` (object)
- `message`
- `outputs` (array)
- `pollAfterSeconds`
- `price` (string)
- `stage`
- `status` (string)
- `tool` (string)
- `toolName` (string)
- `upload`
- `websiteUrl` (string)

### `get_free_audio_job` (~78 tokens)

Check a free audio job

Use this after create_free_audio_job and the upload, no more than every 10 seconds, until the job is completed or failed. When it completes, it lists every output file (for example lead vocal, backing vocals, instrumental) with a download link.

Input parameters:

- `jobId` (string, required): The id returned by create_free_audio_job.

Output parameters:

- `createdAt`
- `durationSeconds`
- `error`
- `fileName`
- `id` (string)
- `links` (object)
- `message`
- `outputs` (array)
- `pollAfterSeconds`
- `price` (string)
- `stage`
- `status` (string)
- `tool` (string)
- `toolName` (string)
- `upload`
- `websiteUrl` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-nicevois-rvc-training/api-mcp#diagnostics

## Score history

- 2026-09-21: 86
- 2026-09-20: 86
- 2026-09-19: 86
- 2026-09-18: 86
- 2026-09-17: 86
- 2026-09-16: 86
- 2026-09-15: 85
- 2026-09-14: 85
- 2026-09-13: 84
- 2026-09-12: 84
- 2026-09-11: 83
- 2026-09-10: 83
- 2026-09-09: 82
- 2026-09-08: 82
- 2026-09-07: 82
- 2026-09-06: 81
- 2026-09-05: 81
- 2026-09-04: 80
- 2026-09-03: 80
- 2026-09-02: 79
- 2026-09-01: 79
- 2026-08-31: 78
- 2026-08-30: 78
- 2026-08-29: 77
- 2026-08-28: 77
- 2026-08-27: 76
- 2026-08-26: 76
- 2026-08-25: 73
- 2026-08-24: 73
- 2026-08-23: 73

## Common questions

### What is the NiceVois MCP server?

NiceVois is an MCP server listed in the public MCP registry as com.nicevois/rvc-training. Free stem, lead/backing vocal, noise and reverb splitting, no account. Train and use RVC voices. This page covers its hosted endpoint (https://nicevois.com/api/mcp).

### Is the NiceVois MCP server safe to use?

NiceVois scores 86 out of 100 on VerifyMCP. 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 NiceVois MCP server expose?

NiceVois exposes 16 tools: get_training_requirements, get_training_account, quote_training, create_training_job, start_training, and 11 more. Their descriptions and schemas cost roughly 1,495 tokens of context every time the server is loaded.

### Does the NiceVois MCP server require authentication?

No. We connected to NiceVois without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the NiceVois MCP server still maintained?

NiceVois 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.

## Links

- Remote endpoint: https://nicevois.com/api/mcp
- Website: https://nicevois.com/agent-api
- Changelog RSS feed: https://verifymcp.io/servers/com-nicevois-rvc-training/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-nicevois-rvc-training/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-nicevois-rvc-training/api-mcp