lmnt

name

lmnt

description

LMNT is a text-to-speech platform that provides APIs for generating natural-sounding voice audio from text, allowing developers and product teams to add voice synthesis, narration, and spoken interfaces to applications, media workflows, and customer experiences. Read and write LMNT data through One: payments, account, aispeech, voice, accountsessions, speechbetapath and more, 58 actions with real parameter documentation. Use whenever the user asks to look something up in LMNT, create or update a record there, or build code against the LMNT API.

LMNT through One

LMNT is a text-to-speech platform that provides APIs for generating natural-sounding voice audio from text, allowing developers and product teams to add voice synthesis, narration, and spoken interfaces to applications, media workflows, and customer experiences.

One exposes LMNT through four MCP tools. The table below carries real action ids from One's knowledge base, so for a common operation you can skip search and go straight to reading the action's parameters.

How to run an action

1. Find the action in the table below, or call search_one_platform_actions with platform lmnt if it is not listed.
2. Call get_one_action_knowledge with the action id. Do this every time, including for actions in this table. The table gives you the id, not the parameters.
3. Call execute_one_action with parameters copied from that knowledge.

Never guess a parameter name, a body field, or an enum value. The knowledge has the real schema, and a guessed field is either a 400 or a silent write of the wrong thing.

Before you start

Call list_one_integrations once and confirm LMNT is connected. If it is missing, the user has not connected it: say so and point them at https://app.withone.ai rather than reaching for raw HTTP.

Each connection carries an access field. If it reports {"policy": "methods", "methods": ["GET"]} the agent is read-only here, so plan a read-only answer instead of attempting a write that will be refused.

Before a write

Creates, updates, deletes and sends land on a real LMNT account and cannot be recalled. State the action and the specific target in one line before the first write in a task, and let the user stop you. Reads need no confirmation.

Actions

Payments

Action	Method	Path	Action id
Cancel Payments	POST	/payments/cancel	conn_mod_def::GMP6DUx9cOs::5ZWMFv4YSa2mh9hXug6D8Q
Cancel Scheduled Change for Payments	POST	/payments/cancel-scheduled-change	conn_mod_def::GMP6DUTUZZA::w25k8F7yTVy0OZSSjvC-hQ
Change Plan	POST	/payments/change-plan	conn_mod_def::GMP6Dmq1uQo::0gjUlB5ITiK__ZXN742_bQ
Mixpanel Webhook Handler for Payments	POST	/payments/webhook/mixpanel	conn_mod_def::GMP6EQftfj8::5nAXmVQKSx6DmabfLsXeew
Setup Intent Handler	POST	/payments/setup-intent	conn_mod_def::GMP6EsuK01c::4VlLz8hBSqeHFs5aNPvwmA
Subscribe to Payments	POST	/payments/subscribe	conn_mod_def::GMP6Ew5eNnE::j2XTyx54RmKt5MZc1SZt8w
Uncancel Payments	POST	/payments/uncancel	conn_mod_def::GMP6EsnbsY0::uuhl2w4mRSCCz5G_x0CEVA
Webhook Handler for Payments	POST	/payments/webhook	conn_mod_def::GMP6E37iiW8::TXA3BnhjR4maE36k47xXaQ

Account

Action	Method	Path	Action id
Get Account	GET	/v1/account	conn_mod_def::GMP6D5VxaJI::yDb7ia0OSlm__ejPazYyww
New Api Key Using Account	GET	/v1/account/new_api_key	conn_mod_def::GMP6EQ9J6Qs::Aq7UCrv2RnqmH-C8CYLPFw
Accept Tos Using Account	POST	/v1/account/accept_tos	conn_mod_def::GMP6DT0bmjc::m5IBjobJRgWEWYQjX1v9KA
Delete Account	DELETE	/v1/account	conn_mod_def::GMP6Duzt_OA::wi2wKSZrRou6yQMxYyGwjA
Set Email Prefs Using Account	POST	/v1/account/set_email_prefs	conn_mod_def::GMP6ExAjt8g::5hwzYfX4TXK23tkg-B5AXw

AiSpeech

Action	Method	Path	Action id
Generate Speech Using LMNT AI Speech	GET	/v1/ai/speech	conn_mod_def::GMP6D-PSKFg::TzyxsMhiQMSmSpZj34f73A
Kanna Improved Using AI Speech	POST	/v1/ai/speech/kanna_improved	conn_mod_def::GMP6ENo7c70::oZ5jAKoWTo6mUsuVLs2ilw
Post Handler Using AI Speech	POST	/v1/ai/speech	conn_mod_def::GMP6EcU4Qk0::TnTCeRNEQmWZIWA3KFHnEg

Voice

Action	Method	Path	Action id
Get a Voice by ID	GET	/v1/ai/voice/{{id}}	conn_mod_def::GMP6EGuCUsU::ZISwgoGPQ7iH3qEMYUdKpQ
Create a Voice Handler	POST	/v1/ai/voice	conn_mod_def::GMP6Dmo8oa0::NtUV9gR1Rvy5rtMfxpCdew
Update a Voice Handler	PUT	/v1/ai/voice/{{id}}	conn_mod_def::GMP6E4Bccrg::KtyeAxI_SsWKVzzheB27KA

AccountSessions

Action	Method	Path	Action id
List Account Sessions	GET	/v1/account/sessions	conn_mod_def::GMP6ENXRZRA::-WUqzPqSSUC4yPXSggcdkg
Revoke All Sessions for an Account	POST	/v1/account/sessions/revoke_all	conn_mod_def::GMP6Ek14URY::S5vuc7YPTsq70NWYlV7r3g
Revoke an Account Session	DELETE	/v1/account/sessions/{{sessionPublicId}}	conn_mod_def::GMP6ElHTkUk::75ksLwmSQVKgHOtBn9oYTg

SpeechBetaPath

Action	Method	Path	Action id
Delete a Speech Beta Path	DELETE	/speech/beta/{{path}}	conn_mod_def::GMP6DcI5Vv8::51hrtbF8QGWo189YO7WY9g
Put to Speech Beta Path	PUT	/speech/beta/{{path}}	conn_mod_def::GMP6Dcjq2g0::swAShipaQQGq2Plh54IC5g

Speech

Action	Method	Path	Action id
Catch All Beta Speech	POST	/speech/beta/{{path}}	conn_mod_def::GMP6DdFiJpI::3o8i19RkTcWWUWnwKJMiKg
Catch All Beta Speech Beta Path	OPTIONS	/speech/beta/{{path}}	conn_mod_def::GMP6DezO9rQ::qgfsV9hgSSm6NWQZ6KF_lQ

ApiKey

Action	Method	Path	Action id
Delete an API Key	DELETE	/v1/account/api_key/{{masked}}	conn_mod_def::GMP6Dnqgnws::jixeC2cCRIaQeS_EQ3tHuQ
Set an API Key Name	POST	/v1/account/api_key/{{masked}}/name	conn_mod_def::GMP6ElYH3Fs::Q_bSe9kWQQuZL2ANnbpaYA

SpeechBytes

Action	Method	Path	Action id
Speech Bytes	POST	/v1/ai/speech/bytes	conn_mod_def::GMP6DUE7GzA::ubUG6CnJRdOu6fJ-rjg1vQ

BillingOverview

Action	Method	Path	Action id
Get Billing Overview	GET	/payments/billing	conn_mod_def::GMP6DUhPXiU::numCvc9JQhWoFOSfo5Q59Q

SpeechBetaContent

Action	Method	Path	Action id
Get Speech Beta Content	GET	/speech/beta/{{path}}	conn_mod_def::GMP6DcwrYbg::rPmVXEEDTS-jLbjC28W8Lw

PaymentMethod

Action	Method	Path	Action id
Replace Payment Method	POST	/payments/payment-method/replace	conn_mod_def::GMP6ElU3VfM::8Vjhd8l_SbSWHaPArh4T6Q

DailyUsageHistory

Action	Method	Path	Action id
Get Daily Usage History	GET	/v1/account/daily_usage_history	conn_mod_def::GMP6D46UILg::APB3j_nDS4mLS8FnmuYnDw

DamageReport

Action	Method	Path	Action id
Get Damage Report	GET	/v1/damage_report	conn_mod_def::GMP6Dl7-YtM::m-wkprqnTbuUh34pcC6etA

AccountClip

Action	Method	Path	Action id
Delete an Account Clip	DELETE	/v1/account/clip/{{clipId}}	conn_mod_def::GMP6DnThljA::b-OctJVjSdisEHFxx694WA

Feedback

Action	Method	Path	Action id
Feedback Handler	POST	/v1/ai/speech/feedback	conn_mod_def::GMP6DvrL-Nc::kumSdD1PSruAeJ2kjoS6Pg

Drain

Action	Method	Path	Action id
Drain	POST	/drain	conn_mod_def::GMP6DwsdoF0::DJfok_t0QmeKkRS8cd9f5A

Echo

Action	Method	Path	Action id
Echo Handler	POST	/echo	conn_mod_def::GMP6DxCD2Vw::6yjreXOETJ6uyDa4VRtixQ

VoiceHandler

Action	Method	Path	Action id
Delete a Voice Handler	DELETE	/v1/ai/voice/{{id}}	conn_mod_def::GMP6DxZQtKk::SySMJrggTEiT5yrVw-_lAg

ClipHandler

Action	Method	Path	Action id
Get a Clip Handler	GET	/v1/account/clip/{{clipId}}	conn_mod_def::GMP6D5ScDDQ::Cv0r-8bzRCy7HyQsAKSHBw

AccountClips

Action	Method	Path	Action id
List Account Clips	GET	/v1/account/clips	conn_mod_def::GMP6D56AZ38::2mBYjElcTgyT34Fx1Ou8bg

UsageHistory

Action	Method	Path	Action id
Get Usage History	GET	/v1/account/billing_history	conn_mod_def::GMP6EFMSunI::POVGiI8-RjGITZ3YEUo65A

Projects

Action	Method	Path	Action id
Handle Project Request	POST	/v1/account/vercel/projects	conn_mod_def::GMP6EF0NVMo::4o0AcDbTQuaTbcoLumb9Bw

PaymentProducts

Action	Method	Path	Action id
List Payment Products	GET	/payments/products	conn_mod_def::GMP6EcmarPQ::Oob1o5KqRd6rzuixpZN-4w

HealthCheck

Action	Method	Path	Action id
Health Check	GET	/health_check	conn_mod_def::GMP6EHEk-Mo::CjZgLVcYRz-2MpFkJFK8pA

BetaVoices

Action	Method	Path	Action id
List Beta Voices for Speech	GET	/speech/beta/voices	conn_mod_def::GMP6EIIqAnE::13UFrLVMS8K_-VZRk1Cq1A

Kanna

Action	Method	Path	Action id
Kanna Handler	POST	/v1/ai/speech/kanna	conn_mod_def::GMP6EIpMcvY::lEoY1oeRQIaGVHjZ7jV6vA

VercelEnvVars

Action	Method	Path	Action id
Handle Env Var Request for Vercel	POST	/v1/account/vercel/env_vars	conn_mod_def::GMP6EJhwLqs::ZJWidnqhTN-PF2ClwI-LHw

VoicePreview

Action	Method	Path	Action id
Invalidate Preview for a Voice	POST	/v1/ai/voice/{{id}}/preview/invalidate	conn_mod_def::GMP6ENhKozY::uoW2PRMuR-St3g7PJBXKog

Auth

Action	Method	Path	Action id
Logout	GET	/auth/oauth/logout	conn_mod_def::GMP6EQQhfa0::gWC4D6UVQQyYYGKUXyh2PA

OauthLogin

Action	Method	Path	Action id
Login Using OAuth Provider	GET	/auth/oauth/login	conn_mod_def::GMP6EQg8HXM::36MczgD4QTqJsaHSL7myWg

Voices

Action	Method	Path	Action id
List Voices	GET	/v1/ai/voice/list	conn_mod_def::GMP6EUftQQQ::pBzL2vA8StyiR8rtgfIniw

AiVoicePrecheck

Action	Method	Path	Action id
Precheck Clone Using AI Voice	POST	/v1/ai/voice/precheck	conn_mod_def::GMP6EcS4B6c::g_CoLQPeQ92qgywftz8Mcg

AiVoicePreview

Action	Method	Path	Action id
Preview Using AI Voice	GET	/v1/ai/voice/{{id}}/preview	conn_mod_def::GMP6EcrKQZE::7bwG7gOoRQeFPqzTtszS4Q

AuthOAuth

Action	Method	Path	Action id
OAuth Callback Handler Using Auth OAuth	GET	/auth/oauth/{{provider}}	conn_mod_def::GMP6EdiSX2E::z6d3lEmxRo-vgeJF1kkLyg

ReadyCheck

Action	Method	Path	Action id
Ready Check	GET	/ready_check	conn_mod_def::GMP6Ekz_axY::I0JvgfjgQomc8yJ5k8XKyw

SpeechBetaSynthesize

Action	Method	Path	Action id
Synthesize Using Speech Beta	POST	/speech/beta/synthesize	conn_mod_def::GMP6EtAG4qQ::zTGn-kHrQYCRYcS7FK8QOw

OauthAuthentication

Action	Method	Path	Action id
Validate OAuth Authentication	GET	/auth/oauth/validate	conn_mod_def::GMP6E4-SdCs::7odsAg1STzy4s1JdkoJzeA

When a call fails

The error comes from LMNT, not from One. A 400 or 422 means your parameters do not match the schema, so re-read the knowledge and fix the field. A 401 or 403 means the connection needs re-authorizing, which no retry will fix. A 404 means the id is not on this account. A 429 means slow down. Never retry a write more than once: the first attempt may have landed.

Full catalog: https://www.withone.ai/knowledge/lmnt

Integration knowledge by One (withone.ai), licensed under One-Knowledge-1.0. Attribution must be preserved in derivative works.