NiceVois is listed as active in the registry but did not answer our last check. It exposes 19 tools.
Free stem, vocal, noise, reverb and format tools. Train RVC voices; convert vocals and whole songs.
Uptime history
83 days of history · worst day 1%
83 days agonow
30.8%
Uptime 24h
28 of 91 checks
19
Tools
read from the server
287 ms
Response time
average over 24h
open, no key
Access
streamable-http
What changed 63
Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 20 August 2026. No other catalogue keeps this.
5 Nov
3 tool descriptions were rewritten
create_audio_job, create_free_audio_job, list_free_audio_tools
5 Nov
2 tools changed the parameters they ask for
create_free_audio_job, quote_training
4 Nov
3 tool descriptions were rewritten
create_audio_job, create_free_audio_job, list_free_audio_tools
4 Nov
2 tools changed the parameters they ask for
create_free_audio_job, quote_training
31 Oct
a tool changed the parameters it asks for
create_training_job
30 Oct
a tool changed the parameters it asks for
quote_training
29 Oct
2 tools changed the parameters they ask for
create_training_job, quote_training
27 Oct
2 tool descriptions were rewritten
create_voice_conversion, download_voice_conversion_output
26 Oct
4 tools changed the parameters they ask for
create_training_job, create_voice_conversion, download_voice_conversion_output and 1 more
26 Oct
3 tools appeared
create_audio_job, get_audio_download, get_audio_job
and 40 more, back to 20 August 2026
NiceVois does not always answer
Over the last week it answered 30.6% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.
run in your terminal
claude mcp add rvc-training --transport http https://nicevois.com/api/mcpSettings → Connectors → Add custom connector, then paste this address
https://nicevois.com/api/mcp~/.codex/config.toml
[mcp_servers.rvc-training]
url = "https://nicevois.com/api/mcp".cursor/mcp.json
{
"mcpServers": {
"rvc-training": {
"url": "https://nicevois.com/api/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"rvc-training": {
"type": "http",
"url": "https://nicevois.com/api/mcp"
}
}
}Available tools 19
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
training
create_training_job
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.
get_training_account
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.
get_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.
get_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.
list_training_jobs
Use this to find the authenticated user's recent NiceVois jobs before asking for a job ID they may not know.
voice
create_voice_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. Creating it counts one of the account's conversions (three free per account, each up to five minutes long; it comes back if the conversion fails); listening and downloads are free.
create_voice_model_import
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.
get_voice_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.
list_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.
audio
create_audio_job
Every NiceVois audio tool. With no account: split_stems, split_lead_backing, remove_noise, remove_reverb and enhance_vocal (one free use of each per network, up to five minutes) and convert_format (free). With a connected account every tool runs on that account's plan (a subscriber's unlimited use applies), including generate_harmony (upper and lower harmonies from a solo lead vocal), which needs an account. Returns an upload URL; then use get_audio_job.
get_audio_download
Returns a short-lived link to one output of a completed audio job. Download it or give it to the user straight away.
get_audio_job
Use after create_audio_job and the upload, until the job is completed or failed. When complete it lists each output; call get_audio_download for the ones the user wants.
free
create_free_audio_job
Split stems, isolate vocals, split lead from backing vocals, remove noise or reverb, or enhance a vocal. No account, API key or sign-up needed: one free use of each tool per network, of a file up to five minutes, as on the website. A connected account runs it on that account's plan instead. Returns an upload URL; PUT the file, then use get_free_audio_job.
get_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.
list_free_audio_tools
Use this to see NiceVois's free audio tools, which need no account, no API key and no sign-up: split a song into vocals and instrumental (vocal remover, acapella, karaoke instrumental), split lead vocals from backing vocals, remove background noise, remove reverb or echo, and enhance a phone-recorded or noisy vocal (Vocal Enhancer). Returns each tool's id, the accepted formats, and a website link to give the user when you cannot upload their file yourself.
conversion
get_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.
download
download_voice_conversion_output
Use after get_voice_conversion says the job is complete and the user wants the cleaned or standard output. Downloads are free; the conversion was counted once when it started. If the exact file was downloaded before, ask before retrying and then set confirmRepeat true.
quote
quote_training
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.
start
start_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.
Tools removed
Tools this server used to expose. Anything built against them stopped working on the day they went.
create_image_training_job
removed 18 Sep 2026
get_image_training_job
removed 18 Sep 2026
get_image_training_requirements
removed 18 Sep 2026
quote_image_training
removed 18 Sep 2026
start_image_training
removed 18 Sep 2026
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://nicevois.com/api/mcp | streamable-http | answering | 166 ms | 6 min ago |
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NiceVois — questions
Answers built from our own checks of this server.
What can NiceVois do?
It exposes 19 tools, read directly from the server on our last check. Among them: create_audio_job, create_free_audio_job, create_training_job, create_voice_conversion, create_voice_model_import, download_voice_conversion_output and 13 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is NiceVois mostly used for?
Its tools cluster around training, voice and audio. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is NiceVois working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 28 of 91 checks got a reply (30.8%), average response time 287 ms. The bar chart above shows every period we have measured.
Did NiceVois ever remove tools?
Yes. create_image_training_job, get_image_training_job, get_image_training_requirements, quote_image_training and 1 more are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.
The registry lists NiceVois as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect NiceVois?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does NiceVois need an API key?
No. NiceVois completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 19 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is NiceVois?
It answers our handshake in 287 ms on average, which is faster than 48% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.