LMNT

aid: lmnt
name: LMNT
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/lmnt/refs/heads/main/apis.yml
created: 2026-06-12
modified: 2026-06-12
specificationVersion: '0.19'
description: 'LMNT is a text-to-speech API platform delivering ultra-low latency voice synthesis with streaming audio output
  designed for real-time conversational AI applications. The platform provides a Speech API for standard text-to-speech generation
  and a Speech Sessions API for WebSocket-based real-time streaming integrated with LLM pipelines, achieving latency under
  300 milliseconds. LMNT supports 31 languages and offers voice cloning from as little as five seconds of audio, with its
  Blizzard 2 model optimized for accuracy, expressiveness, and pronunciation. Authentication uses API keys managed via the
  app dashboard, with SDKs available for Python, TypeScript, and Go.

  '
tags:
- text-to-speech
- voice synthesis
- voice cloning
- audio streaming
- conversational AI
- low latency
- real-time audio
apis:
- name: LMNT Speech API
  description: 'REST API for converting text to speech audio, supporting streaming binary audio output, 31 languages, voice
    cloning, word timestamps, and configurable expressiveness parameters.

    '
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.lmnt.com/api-reference/speech/synthesize-speech-bytes
  baseURL: https://api.lmnt.com
  tags:
  - text-to-speech
  - audio
  - streaming
  properties:
  - type: Documentation
    url: https://docs.lmnt.com/api-reference/speech/synthesize-speech-bytes
  - type: OpenAPI
    url: openapi/lmnt-speech-openapi.yml
- name: LMNT Speech Sessions API
  description: 'WebSocket-based real-time speech generation API for streaming LLM text output to synthesized audio with reset-latency
    support for conversational AI applications requiring interrupt handling.

    '
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.lmnt.com/api-reference/speech/generate-speech-session
  baseURL: wss://api.lmnt.com
  tags:
  - speech sessions
  - websocket
  - real-time
  - streaming
  properties:
  - type: Documentation
    url: https://docs.lmnt.com/api-reference/speech/generate-speech-session
common:
- type: Website
  url: https://www.lmnt.com/
- type: Documentation
  url: https://docs.lmnt.com/
- type: GitHubOrganization
  url: https://github.com/lmnt-com
- type: LinkedIn
  url: https://www.linkedin.com/company/lmnt
- type: X
  url: https://x.com/lmnt_com
- type: Pricing
  url: https://www.lmnt.com/pricing
- type: ChangeLog
  url: https://docs.lmnt.com/changelog/overview
- type: Plans
  url: plans/lmnt-plans-pricing.yml
- type: RateLimits
  url: rate-limits/lmnt-rate-limits.yml
- type: FinOps
  url: finops/lmnt-finops.yml
- type: OpenAPI
  url: openapi/lmnt-speech-openapi.yml
- type: JSONSchema
  url: json-schema/lmnt-voice-schema.json
- type: JSONSchema
  url: json-schema/lmnt-speech-synthesis-schema.json
- type: JSONLDContext
  url: json-ld/lmnt-context.jsonld
- type: Vocabulary
  url: vocabulary/lmnt-vocabulary.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com