FreeTTS
REMOTE · MCP.FREETTS.ORG · 2 COMPONENTS
Text to speech in 149 languages: MP3 links from any assistant. Free without an account.
Available components
Last scanned (16 hours ago)
Scores higher than 94% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Design and Media
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. How we score → Why this is hard to score →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability85
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1678 tokens (~119/item across 14 items; 7 tools + 7 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage99
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 97% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 7 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 9 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
- Supports UI / widget rendering.Pass
Checks we ran (14)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
- Capabilities
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
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.
- 31 Oct 26 0
- Resource “player” now points somewhere else: ui://freetts/player-v2.html → ui://freetts/player-v4.html security
- New resource “player-old-2” functional
- New resource “player-old-1” functional
- Server version: 1.1.0 → 1.1.5 functional
- “text_to_speech” added an optional parameter “rerender_of” cosmetic
- “text_to_speech” reworded the description of “text” cosmetic
- “text_to_speech” made “text” optional cosmetic
- 30 Oct 26 +1
- Stability: 0.97 → pass security
- First check of Capabilities: pass functional
- New resource “player” functional
- Server version: 1.0.9 → 1.1.0 functional
- 28 Oct 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.
- 26 Oct 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.
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 77 to 80. That category is still filling its 30-day observation window: 23 days of observed history at the previous scan, 24 at this one. The score rises as the window fills, whether or not the server changes.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Oct 26 +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.
- 17 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.
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 5 Nov 2026 · Probed https://mcp.freetts.org/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=freetts.org | CN=YE2,O=Let's Encrypt,C=US | 20 Sept 2026 | 19 Dec 2026 | ECDSA 256 | ECDSA-SHA384 | 5926c8efc0069ede3c52d1441341ad5a3fc |
| SANs: *.freetts.org, freetts.org | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | SHA256-RSA | 6c8f1dc727c7117f7baf853ac980f9cd |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.freetts.org. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| org. | DS published | 725, 26974 | 8, 8 | Verified |
| freetts.org. | No DS | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.freetts.org/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.freetts.org/mcp | HTTPS enforced | 301 | https://mcp.freetts.org/mcp |
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 →
check_usage Check FreeTTS usage and plan ~56
Show the FreeTTS plan behind this connection and what is left: characters today or this month, requests a minute, HD voices, watermark. Use it when the user asks about limits, their plan, or why a request was refused.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
dialogue_to_speech Dialogue to speech (two or more voices) ~180
Turn a script with several speakers into one audio file, a different FreeTTS voice per speaker, with a pause between lines. Write each line as 'Name: text'. Use it for two-host shows, interviews, scenes, language lessons with two speakers. Needs a connected FreeTTS PRO account.
| Name | Type | Req | Description |
|---|---|---|---|
| language | string | – | Language of the lines when no voices are given. |
| pause_ms | integer | – | Silence between lines in milliseconds. Default 600. |
| script | string | yes | Lines like 'Abd: Tonight we cook shakshuka.' one per line. Names before the colon. |
| voices | object | – | Speaker name to FreeTTS voice id, like {"Abd": "en-US-AndrewNeural", "Guest": "en-US-EmmaNeural"}. Unnamed speakers get a voice each. |
No output schema declared.
No examples provided.
list_voices List FreeTTS voices ~176
List FreeTTS voices for a language or a search word, with the voice id to pass to text_to_speech. Says which voices are free and which need a FreeTTS PRO key (HD and Signature). Use it when the user names a language, accent or gender, or asks what voices exist.
| Name | Type | Req | Description |
|---|---|---|---|
| free_only | boolean | – | Only voices that work without a FreeTTS key. |
| gender | string | – | Filter by gender. |
| language | string | – | Language or locale, like 'German', 'de-DE', 'Spanish (Mexico)' or 'en'. Empty lists every language. |
| limit | integer | – | How many to return. Default 15. |
| search | string | – | A word to match in the voice name or personality, like 'Andrew', 'calm' or 'news'. |
No output schema declared.
No examples provided.
script_to_tracks Script to timed tracks (Script mode) ~370
Record a script with exact timing, the way FreeTTS Script mode does: (pause 2) is exactly 2 seconds of silence, (beep), (ding) and (click) play a sound, 'CUE:' lines are read in a second voice, 'TRACK: name' starts a new audio file, 'NAME: line' makes a scene with a voice per character. Returns one file with everything plus one file per track. Use it for ear prompter tracks, voiceovers timed to footage, rehearsal tracks, workout or recipe step audio. Needs a connected FreeTTS PRO account.
| Name | Type | Req | Description |
|---|---|---|---|
| count_in | string | – | Spoken count-in before each track, one number a second. Default none. |
| cue_voice | string | – | Voice for CUE: lines and [bracketed] words. Default Aria. |
| line_voice | string | – | Voice for the main lines: a steady voice name or id (Guy, Andrew, Ava, Aria, Jenny, Brian, Emma, Sonia, Ryan, Libby, Natasha, William, Clara, Liam...). Default Guy. |
| my_part | string | – | In a scene, the character you play: their lines become timed gaps for you to say them. |
| paragraph_pause_ms | integer | – | Silence after each paragraph. Default 1000. |
| script | string | yes | The script text. See freetts.org/text-to-speech-for-actors for the syntax. |
| sentence_pause_ms | integer | – | Silence after each sentence. Default 500. |
| speed | integer | – | Percent slower or faster for the main lines. Default 0. |
| track_end | string | – | After the last line of each track: nothing, a long beep, or the word End. Default none. |
No output schema declared.
No examples provided.
suggest_voice Suggest a FreeTTS voice ~107
Suggest three FreeTTS voices for a language and a use (audiobook, tutorial, ad, news, children's story, meditation, podcast), with a short reason each. Use it when the user has not named a voice.
| Name | Type | Req | Description |
|---|---|---|---|
| gender | string | – | – |
| language | string | yes | Language or locale, like 'English (US)', 'de-DE' or 'Portuguese (Brazil)'. |
| use | string | – | What the audio is for, in a few words. |
No output schema declared.
No examples provided.
text_to_speech Text to speech (FreeTTS) ~350
Convert text to spoken audio with a FreeTTS voice and return a download link to the MP3 (or WAV with a FreeTTS PRO key). Use it when the user wants text read aloud, narrated, or saved as an audio file. Without a FreeTTS key: standard voices, up to 2,000 characters a call, a short spoken "FreeTTS" tag at the end, file kept one hour. With a key: the account's plan (PRO: HD and Signature voices, no tag, 10,000 characters a call, files kept 30 days).
| Name | Type | Req | Description |
|---|---|---|---|
| format | string | – | mp3 (default) or wav (FreeTTS PRO). |
| include_audio | boolean | – | Also return the audio bytes in the result (large). Default false; the link is enough for most clients. |
| language | string | – | Language of the text when no voice is given, like 'German' or 'pt-BR'. |
| rerender_of | string | – | Read the same words as an earlier result again, in another voice or speed: the audio link (or id) that result returned, from the last 24 hours. The text is then not needed. |
| speed | integer | – | Percent slower (negative) or faster (positive). Default 0. |
| text | string | – | The text to read. Plain text; SSML is not needed. Required unless rerender_of is given. |
| voice | string | – | A FreeTTS voice id from list_voices, like en-US-JennyNeural (a short name like 'Jenny' also works). If empty, a good standard voice for the language is chosen. |
No output schema declared.
No examples provided.
transcribe_audio Transcribe audio (speech to text) ~108
Turn a recording into text with FreeTTS speech to text. Give a public https URL to an audio file (mp3, wav, m4a, ogg, webm). Needs a connected FreeTTS PRO account.
| Name | Type | Req | Description |
|---|---|---|---|
| audio_url | string | yes | Public https URL of the audio file. |
| language | string | – | Language of the recording, like 'en-US', 'de-DE', 'Arabic' or 'es', or 'auto' to detect it (default). |
No output schema declared.
No examples provided.
How do I install the FreeTTS MCP server?
FreeTTS is a hosted endpoint at https://mcp.freetts.org/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.
remote · mcp.freetts.org
claude mcp add --transport http org-freetts-mcp 'https://mcp.freetts.org/mcp'
What is the FreeTTS MCP server?
FreeTTS is an MCP server listed in the public MCP registry as org.freetts/mcp. Text to speech in 149 languages: MP3 links from any assistant. Free without an account. This page covers its hosted endpoint (https://mcp.freetts.org/mcp).
Is the FreeTTS MCP server safe to use?
FreeTTS scores 87 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 FreeTTS MCP server expose?
FreeTTS exposes 7 tools: list_voices, suggest_voice, text_to_speech, check_usage, dialogue_to_speech, and 2 more. Their descriptions and schemas cost roughly 1,347 tokens of context every time the server is loaded.
Does the FreeTTS MCP server require authentication?
No. We connected to FreeTTS without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the FreeTTS MCP server still maintained?
FreeTTS is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What did VerifyMCP test on the FreeTTS MCP server?
VerifyMCP ran 14 checks on FreeTTS, covering TLS certificate, Authorization, HTTPS, HSTS header and 10 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.