Sonix

Sonix is an AI-powered platform for automated audio and video transcription, subtitles, and translation. It transcribes in 54+ languages with speaker labels and word-level timestamps, translates transcripts into 55+ languages, generates subtitles and captions (SRT, VTT, TXT, JSON, DOCX, PDF), and runs AI analysis (summaries, chapters, sentiment, entities). The Sonix REST API - available to subscribers - lets developers upload media, poll transcription status, retrieve and edit transcripts, export subtitles, and translate, all authorized with a Bearer API key against https://api.sonix.ai/v1.

Sonix publishes 6 APIs on the APIs.io network, including AI Analysis API, Exports API, Folders API, and 3 more. Tagged areas include Audio Transcription, Transcription, Speech-to-Text, Subtitles, and Captions.

Sonix’s developer surface includes authentication, documentation, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

39.4/100 developing ▬ flat Agent 20/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessPaid

1 APIs

Audio Transcription Transcription Speech-to-Text Subtitles Captions Translation Artificial Intelligence Media

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 39.4/100 · developing

Contract Quality 13.3 / 23

Developer Ergonomics 5.8 / 18

Access Clarity 7.1 / 18

Operational Transparency 3.7 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 20/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/sonix: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

Sonix AI Analysis API

Generate summaries, chapters, sentiment, and entity analysis from transcripts.

Sonix Exports API

Export transcripts as subtitles, captions, documents, and media burn-ins.

Sonix Folders API

Organize media into folders.

Sonix Media API

Upload and manage audio and video media files for transcription.

Sonix Transcripts API

Retrieve and edit transcripts produced from media.

Sonix Translations API

Translate a completed transcript into another language.

Open Collections 8

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Sonix AI Analysis API

OPEN COLLECTION

Sonix AI Analysis Exports API

OPEN COLLECTION

Sonix AI Analysis Folders API

OPEN COLLECTION

Sonix AI Analysis Media API

OPEN COLLECTION

Sonix AI Analysis Transcripts API

OPEN COLLECTION

Sonix AI Analysis Translations API

OPEN COLLECTION

Sonix API

OPEN COLLECTION

Scroll for all 8

Pricing Plans 1

Published pricing tiers and plan structures.

Sonix Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Sonix Rate Limits

6 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Sonix Finops

FINOPS

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Sonix Authentication

http · 1 scheme

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Sonix Agentic Access

22 operations · 11 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: sonix
url: https://raw.githubusercontent.com/api-evangelist/sonix/refs/heads/main/apis.yml
name: Sonix
kind: company
description: Sonix is an AI-powered platform for automated audio and video transcription, subtitles, and translation. It transcribes
  in 54+ languages with speaker labels and word-level timestamps, translates transcripts into 55+ languages, generates subtitles
  and captions (SRT, VTT, TXT, JSON, DOCX, PDF), and runs AI analysis (summaries, chapters, sentiment, entities). The Sonix
  REST API - available to subscribers - lets developers upload media, poll transcription status, retrieve and edit transcripts,
  export subtitles, and translate, all authorized with a Bearer API key against https://api.sonix.ai/v1.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/sonix.png
tags:
- Audio Transcription
- Transcription
- Speech-to-Text
- Subtitles
- Captions
- Translation
- Artificial Intelligence
- Media
tags_raw:
- Audio Transcription
- Transcription
- Speech-to-Text
- Subtitles
- Captions
- Translation
- AI
- Media
created: '2026-07-11'
modified: '2026-07-11'
specificationVersion: '0.23'
apis:
- aid: sonix:sonix-ai-analysis-api
  name: Sonix AI Analysis API
  description: Generate summaries, chapters, sentiment, and entity analysis from transcripts.
  humanURL: https://sonix.ai/docs/api
  baseURL: https://api.sonix.ai/v1
  tags:
  - AI Analysis
  properties:
  - type: OpenAPI
    url: openapi/sonix-ai-analysis-api-openapi.yml
  - type: Documentation
    url: https://sonix.ai/docs/api
  - type: APIReference
    url: https://sonix.ai/api
  - type: PostmanCollection
    url: collections/sonix.postman_collection.json
  - type: OpenCollection
    url: collections/sonix.opencollection.json
- aid: sonix:sonix-exports-api
  name: Sonix Exports API
  description: Export transcripts as subtitles, captions, documents, and media burn-ins.
  humanURL: https://sonix.ai/docs/api
  baseURL: https://api.sonix.ai/v1
  tags:
  - Export
  tags_raw:
  - Exports
  properties:
  - type: OpenAPI
    url: openapi/sonix-exports-api-openapi.yml
  - type: Documentation
    url: https://sonix.ai/docs/api
  - type: APIReference
    url: https://sonix.ai/api
  - type: PostmanCollection
    url: collections/sonix.postman_collection.json
  - type: OpenCollection
    url: collections/sonix.opencollection.json
- aid: sonix:sonix-folders-api
  name: Sonix Folders API
  description: Organize media into folders.
  humanURL: https://sonix.ai/docs/api
  baseURL: https://api.sonix.ai/v1
  tags:
  - Folders
  properties:
  - type: OpenAPI
    url: openapi/sonix-folders-api-openapi.yml
  - type: Documentation
    url: https://sonix.ai/docs/api
  - type: APIReference
    url: https://sonix.ai/api
  - type: PostmanCollection
    url: collections/sonix.postman_collection.json
  - type: OpenCollection
    url: collections/sonix.opencollection.json
- aid: sonix:sonix-media-api
  name: Sonix Media API
  description: Upload and manage audio and video media files for transcription.
  humanURL: https://sonix.ai/docs/api
  baseURL: https://api.sonix.ai/v1
  tags:
  - Media
  properties:
  - type: OpenAPI
    url: openapi/sonix-media-api-openapi.yml
  - type: Documentation
    url: https://sonix.ai/docs/api
  - type: APIReference
    url: https://sonix.ai/api
  - type: PostmanCollection
    url: collections/sonix.postman_collection.json
  - type: OpenCollection
    url: collections/sonix.opencollection.json
- aid: sonix:sonix-transcripts-api
  name: Sonix Transcripts API
  description: Retrieve and edit transcripts produced from media.
  humanURL: https://sonix.ai/docs/api
  baseURL: https://api.sonix.ai/v1
  tags:
  - Transcripts
  properties:
  - type: OpenAPI
    url: openapi/sonix-transcripts-api-openapi.yml
  - type: Documentation
    url: https://sonix.ai/docs/api
  - type: APIReference
    url: https://sonix.ai/api
  - type: PostmanCollection
    url: collections/sonix.postman_collection.json
  - type: OpenCollection
    url: collections/sonix.opencollection.json
- aid: sonix:sonix-translations-api
  name: Sonix Translations API
  description: Translate a completed transcript into another language.
  humanURL: https://sonix.ai/docs/api
  baseURL: https://api.sonix.ai/v1
  tags:
  - Translations
  properties:
  - type: OpenAPI
    url: openapi/sonix-translations-api-openapi.yml
  - type: Documentation
    url: https://sonix.ai/docs/api
  - type: APIReference
    url: https://sonix.ai/api
  - type: PostmanCollection
    url: collections/sonix.postman_collection.json
  - type: OpenCollection
    url: collections/sonix.opencollection.json
common:
- type: CapabilityMap
  url: capabilities/sonix-capability-edges.yml
  name: Sonix Business Capability Map
- type: AgenticAccess
  url: agentic-access/sonix-agentic-access.yml
- type: Authentication
  url: authentication/sonix-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/sonix-ai
- type: Website
  url: https://sonix.ai
- type: Documentation
  url: https://sonix.ai/docs/api
- type: Plans
  url: plans/sonix-plans-pricing.yml
- type: RateLimits
  url: rate-limits/sonix-rate-limits.yml
- type: FinOps
  url: finops/sonix-finops.yml
- url: https://sonix.ai/resources
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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