Argmax

Argmax, Inc. builds on-device inference infrastructure that lets developers run foundation models locally on user devices for privacy, real-time performance, and predictable per-device costs. Its products are commercial Pro SDKs on top of open-source cores: WhisperKit (speech-to-text with file transcription, real-time streaming, word timestamps, and subtitle export), SpeakerKit (speaker recognition, diarization, and voice-activity detection), DiffusionKit (image generation for Flux.1 and Stable Diffusion on Apple Silicon), and TTSKit. Argmax also ships the Argmax Local Server for macOS, a local transcription server that is API-compatible with the Deepgram Speech-to-Text (Live) API and driven by an official Node client (@argmaxinc/local-server). Devices are licensed through the ArgmaxSDK (ax_-prefixed API keys) with device-based billing measured by unique licenseId. Backed by General Catalyst.

Argmax publishes 1 API on the APIs.io network. Tagged areas include Company, Enterprise, Artificial Intelligence, Machine-Learning, and On-Device Inference.

Argmax’s developer surface includes documentation, API reference, getting-started guide, pricing, engineering blog, changelog, sandbox, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.3/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Enterprise Artificial Intelligence Machine-LearningOn-Device InferenceSpeech Recognition Speech-to-Text Transcription Speaker Diarization Image-Generation SDK Apple Silicon Edge AI

Kin Score

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

Composite quality — 34.3/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 14.3 / 20

Access Clarity 8.9 / 20

Operational Transparency 4.4 / 13

Contract Governance 0.0 / 12

Discoverability 6.7 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 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 0 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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APIs 1

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

Argmax Local Server

A local transcription server for macOS that is API-compatible with the Deepgram Speech-to-Text (Live) API, exposing a WebSocket streaming interface (default ws://localhost:50060...

Security Posture 2

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

Argmax Authentication

apiKey · 1 scheme

SECURITY

Argmax Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Sandbox

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

ChangeLog

ChangeLog

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Models

Models

Source (apis.yml)

aid: argmax
name: Argmax
description: 'Argmax, Inc. builds on-device inference infrastructure that lets developers run foundation models locally on
  user devices for privacy, real-time performance, and predictable per-device costs. Its products are commercial Pro SDKs
  on top of open-source cores: WhisperKit (speech-to-text with file transcription, real-time streaming, word timestamps, and
  subtitle export), SpeakerKit (speaker recognition, diarization, and voice-activity detection), DiffusionKit (image generation
  for Flux.1 and Stable Diffusion on Apple Silicon), and TTSKit. Argmax also ships the Argmax Local Server for macOS, a local
  transcription server that is API-compatible with the Deepgram Speech-to-Text (Live) API and driven by an official Node client
  (@argmaxinc/local-server). Devices are licensed through the ArgmaxSDK (ax_-prefixed API keys) with device-based billing
  measured by unique licenseId. Backed by General Catalyst.'
url: https://raw.githubusercontent.com/api-evangelist/argmax/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  try_now_blocked_by: loopback
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://cdn.prod.website-files.com/677fd5c33a098b58d447e17b/678ec5cb674cb149d3c4c026_Argmax-OpenGraph.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- general-catalyst
x-tier: profiled
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Enterprise
- Artificial Intelligence
- Machine-Learning
- On-Device Inference
- Speech Recognition
- Speech-to-Text
- Transcription
- Speaker Diarization
- Image-Generation
- SDK
- Apple Silicon
- Edge AI
tags_raw:
- Company
- Enterprise
- Artificial Intelligence
- Machine Learning
- On-Device Inference
- Speech Recognition
- Speech to Text
- Transcription
- Speaker Diarization
- Image Generation
- SDKs
- Apple Silicon
- Edge AI
apis:
- name: Argmax Local Server
  description: A local transcription server for macOS that is API-compatible with the Deepgram Speech-to-Text (Live) API,
    exposing a WebSocket streaming interface (default ws://localhost:50060) driven by the official @argmaxinc/local-server
    Node client. Authenticated with an Argmax API key (ax_ prefix); a Python client is documented as coming soon.
  humanURL: https://app.argmaxinc.com/docs/guides/using-local-server
  baseURL: ws://localhost:50060
  tags:
  - Speech-to-Text
  - Transcription
  - Streaming
  - WebSocket
  - Deepgram-Compatible
  tags_raw:
  - Speech to Text
  - Transcription
  - Streaming
  - WebSocket
  - Deepgram-Compatible
  properties:
  - type: Documentation
    url: https://app.argmaxinc.com/docs/guides/using-local-server
  - type: SDKs
    url: https://www.npmjs.com/package/@argmaxinc/local-server
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/argmax-domain-security.yml
- type: Website
  url: https://www.argmaxinc.com
- type: DeveloperPortal
  url: https://app.argmaxinc.com
- type: Documentation
  url: https://app.argmaxinc.com/docs
- type: APIReference
  url: https://app.argmaxinc.com/docs/guides/using-local-server
- type: GettingStarted
  url: https://app.argmaxinc.com/docs/guides/upgrading-to-pro-sdk
- type: Models
  url: https://app.argmaxinc.com/docs/models
- type: Pricing
  url: https://www.argmaxinc.com/pricing
- type: Blog
  url: https://www.argmaxinc.com/blog
- type: GitHubOrganization
  url: https://github.com/argmaxinc
- type: StatusPage
  url: https://status.argmaxinc.com
- type: ChangeLog
  url: https://app.argmaxinc.com/docs/changelog
- type: Sandbox
  url: https://testflight.apple.com/join/Q1cywTJw
- type: Support
  url: mailto:pro-sdk-support@argmaxinc.com
- type: SignUp
  url: https://app.argmaxinc.com
- type: Login
  url: https://app.argmaxinc.com/login
- type: TermsOfService
  url: https://www.argmaxinc.com/terms-of-service
- type: PrivacyPolicy
  url: https://www.argmaxinc.com/privacy
- type: Packages
  url: packages/argmax-packages.yml
- type: SDKs
  url: packages/argmax-packages.yml
- type: Authentication
  url: authentication/argmax-authentication.yml
- type: Conventions
  url: conventions/argmax-conventions.yml
- type: LLMsTxt
  url: llms/argmax-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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