What this MCP does
Converts text and scripts to spoken audio, supports multi-voice and timed tracks, lists voices, and transcribes audio for eligible accounts.
Capabilities
Tools
7
tools
check_usage
Check FreeTTS usage and plan
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.
Read only
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {}}
dialogue_to_speech
Dialogue to speech (two or more voices)
Turn a script with several speakers into one audio file, a different FreeTTS voice per speaker, with a pause between lines. Write each line as 'Name: text'. Use it for two-host shows, interviews, scenes, language lessons with two speakers. Needs a connected FreeTTS PRO account.
Open world
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['script'], 'properties': {'script': {'type': 'string', 'maxLength': 25000, 'minLength': 1, 'description': "Lines like 'Abd: Tonight we cook shakshuka.' one per line. Names before the colon."}, 'voices': {'type': 'object', 'description': 'Speaker name to FreeTTS voice id, like {"Abd": "en-US-AndrewNeural", "Guest": "en-US-EmmaNeural"}. Unnamed speakers get a voice each.', 'additionalProperties': {'type': 'string'}}, 'language': {'type': 'string', 'description': 'Language of the lines when no voices are given.'}, 'pause_ms': {'type': 'integer', 'maximum': 5000, 'minimum': 0, 'description': 'Silence between lines in milliseconds. Default 600.'}}, 'additionalProperties': False}
list_voices
List FreeTTS voices
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.
Read only
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'properties': {'limit': {'type': 'integer', 'maximum': 200, 'minimum': 1, 'description': 'How many to return. Default 15.'}, 'gender': {'enum': ['female', 'male', 'any'], 'type': 'string', 'description': 'Filter by gender.'}, 'search': {'type': 'string', 'description': "A word to match in the voice name or personality, like 'Andrew', 'calm' or 'news'."}, 'language': {'type': 'string', 'description': "Language or locale, like 'German', 'de-DE', 'Spanish (Mexico)' or 'en'. Empty lists every language."}, 'free_only': {'type': 'boolean', 'description': 'Only voices that work without a FreeTTS key.'}}, 'additionalProperties': False}
script_to_tracks
Script to timed tracks (Script mode)
Record a script with exact timing, the way FreeTTS Script mode does: (pause 2) is exactly 2 seconds of silence, (beep), (ding) and (click) play a sound, 'CUE:' lines are read in a second voice, 'TRACK: name' starts a new audio file, 'NAME: line' makes a scene with a voice per character. Returns one file with everything plus one file per track. Use it for ear prompter tracks, voiceovers timed to footage, rehearsal tracks, workout or recipe step audio. Needs a connected FreeTTS PRO account.
Open world
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['script'], 'properties': {'speed': {'type': 'integer', 'maximum': 30, 'minimum': -30, 'description': 'Percent slower or faster for the main lines. Default 0.'}, 'script': {'type': 'string', 'maxLength': 60000, 'minLength': 1, 'description': 'The script text. See freetts.org/text-to-speech-for-actors for the syntax.'}, 'my_part': {'type': 'string', 'description': 'In a scene, the character you play: their lines become timed gaps for you to say them.'}, 'count_in': {'enum': ['none', '3', '5', '10'], 'type': 'string', 'description': 'Spoken count-in before each track, one number a second. Default none.'}, 'cue_voice': {'type': 'string', 'description': 'Voice for CUE: lines and [bracketed] words. Default Aria.'}, 'track_end': {'enum': ['none', 'beep', 'end'], 'type': 'string', 'description': 'After the last line of each track: nothing, a long beep, or the word End. Default none.'}, 'line_voice': {'type': 'string', 'description': '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.'}, 'sentence_pause_ms': {'type': 'integer', 'maximum': 3000, 'minimum': 0, 'description': 'Silence after each sentence. Default 500.'}, 'paragraph_pause_ms': {'type': 'integer', 'maximum': 5000, 'minimum': 0, 'description': 'Silence after each paragraph. Default 1000.'}}, 'additionalProperties': False}
suggest_voice
Suggest a FreeTTS voice
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.
Read only
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['language'], 'properties': {'use': {'type': 'string', 'description': 'What the audio is for, in a few words.'}, 'gender': {'enum': ['female', 'male', 'any'], 'type': 'string'}, 'language': {'type': 'string', 'description': "Language or locale, like 'English (US)', 'de-DE' or 'Portuguese (Brazil)'."}}, 'additionalProperties': False}
text_to_speech
Text to speech (FreeTTS)
Convert text to spoken audio with a FreeTTS voice and return a download link to the MP3 (or WAV with a FreeTTS PRO key). Use it when the user wants text read aloud, narrated, or saved as an audio file. Without a FreeTTS key: standard voices, up to 2,000 characters a call, a short spoken "FreeTTS" tag at the end, file kept one hour. With a key: the account's plan (PRO: HD and Signature voices, no tag, 10,000 characters a call, files kept 30 days).
Open world
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['text'], 'properties': {'text': {'type': 'string', 'maxLength': 30000, 'minLength': 1, 'description': 'The text to read. Plain text; SSML is not needed.'}, 'speed': {'type': 'integer', 'maximum': 30, 'minimum': -30, 'description': 'Percent slower (negative) or faster (positive). Default 0.'}, 'voice': {'type': 'string', 'description': "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."}, 'format': {'enum': ['mp3', 'wav'], 'type': 'string', 'description': 'mp3 (default) or wav (FreeTTS PRO).'}, 'language': {'type': 'string', 'description': "Language of the text when no voice is given, like 'German' or 'pt-BR'."}, 'include_audio': {'type': 'boolean', 'description': 'Also return the audio bytes in the result (large). Default false; the link is enough for most clients.'}}, 'additionalProperties': False}
transcribe_audio
Transcribe audio (speech to text)
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.
Read only
Open world
Idempotent
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['audio_url'], 'properties': {'language': {'type': 'string', 'description': "Language of the recording, like 'en-US', 'de-DE', 'Arabic' or 'es', or 'auto' to detect it (default)."}, 'audio_url': {'type': 'string', 'format': 'uri', 'description': 'Public https URL of the audio file.'}}, 'additionalProperties': False}
History
Recent tool changes
Added
transcribe_audio
Oct. 2, 2026, 2:40 a.m.
Added
script_to_tracks
Oct. 2, 2026, 2:40 a.m.
Added
dialogue_to_speech
Oct. 2, 2026, 2:40 a.m.
Added
check_usage
Oct. 2, 2026, 2:40 a.m.
Added
text_to_speech
Oct. 2, 2026, 2:40 a.m.
Added
suggest_voice
Oct. 2, 2026, 2:40 a.m.
Added
list_voices
Oct. 2, 2026, 2:40 a.m.
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