Limitless

Limitless builds the Pendant, a wearable AI device that continuously captures and transcribes the conversations its wearer has, paired with a desktop, web, and mobile app plus "Ask AI" for searching that personal history. The Limitless Developer API gives users programmatic access to their own data: lifelogs (Pendant recordings with markdown transcripts and a speaker-attributed structured contents tree), Ask AI chat history including the assistant's tool calls and the entries it retrieved, and raw Ogg Opus audio export. The API is authenticated with an X-API-Key header, is cursor paginated, and supports hybrid keyword plus semantic search across a user's lifelogs. Limitless also runs an official hosted MCP server at https://api.limitless.ai/mcp, backed by a complete OAuth 2.0 and OpenID Connect discovery surface with PKCE and dynamic client registration. Limitless was acquired by Meta; Pendant sales ended 2025-12-05 and existing customers are supported through 2026 on a free Unlimited Plan.

Limitless publishes 4 APIs on the APIs.io network, including Chats API, Download Audio API, Lifelogs API, and 1 more. Tagged areas include Artificial Intelligence, Wearables, Voice, Transcription, and Personal Data.

Limitless’ developer surface includes documentation, API reference, getting-started guide, signup flow, support, privacy policy, authentication, and 27 more developer resources.

🌐 Visit website 📡 Source on GitHub

41.0/100 thin ▬ flat Agent 76/100 agent native Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

4 APIs 1 MCP Servers

Artificial IntelligenceWearablesVoiceTranscriptionPersonal DataConsumer HardwareSearchProductivityMeeting NotesModel Context Protocol

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 41.0/100 · thin

Contract Quality 9.4 / 25

Developer Ergonomics 13.0 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 1.7 / 13

Governance 0.0 / 12

Discoverability 10.0 / 10

Agent readiness — 76/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 15 / 15

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/limitless: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 4

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

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

limitless-mcp.yml

MCP SERVER

Rate Limits 1

Documented rate limits and quota policies.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Limitless Scopes

4 scopes · authorizationCode

4 scopes

SCOPES

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

Conformance

Lifecycle

ErrorCatalog

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

SourceCode

SourceCode

Packages

Packages

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

Support

HelpCenter

Deprecation

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Privacy

Privacy

Company 3

The organization behind the API

Website

Website

About

About

Careers

Careers

Other 2

Properties that don't map to a standard resource type

OpenIDConnect

OpenIDConnect

Overlay

Overlay

Source (apis.yml)

aid: limitless
name: Limitless
description: 'Limitless builds the Pendant, a wearable AI device that continuously captures and transcribes the conversations
  its wearer has, paired with a desktop, web, and mobile app plus "Ask AI" for searching that personal history. The Limitless
  Developer API gives users programmatic access to their own data: lifelogs (Pendant recordings with markdown transcripts
  and a speaker-attributed structured contents tree), Ask AI chat history including the assistant''s tool calls and the entries
  it retrieved, and raw Ogg Opus audio export. The API is authenticated with an X-API-Key header, is cursor paginated, and
  supports hybrid keyword plus semantic search across a user''s lifelogs. Limitless also runs an official hosted MCP server
  at https://api.limitless.ai/mcp, backed by a complete OAuth 2.0 and OpenID Connect discovery surface with PKCE and dynamic
  client registration. Limitless was acquired by Meta; Pendant sales ended 2025-12-05 and existing customers are supported
  through 2026 on a free Unlimited Plan.'
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://www.limitless.ai/media/og-preview.jpg
url: https://raw.githubusercontent.com/api-evangelist/limitless/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-acquired-by: Meta
x-tier: enriched
x-tier-reason: developer-api-harvested
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Artificial Intelligence
- Wearables
- Voice
- Transcription
- Personal Data
- Consumer Hardware
- Search
- Productivity
- Meeting Notes
- Model Context Protocol
apis:
- aid: limitless:limitless-chats-api
  name: Limitless Chats API
  description: The Chats API from Limitless — 2 operation(s) for chats.
  humanURL: https://www.limitless.ai/developers
  baseURL: https://api.limitless.ai
  tags:
  - Chats
  properties:
  - type: OpenAPI
    url: openapi/limitless-chats-api-openapi.yml
  - type: Documentation
    url: https://www.limitless.ai/developers
  - type: APIReference
    url: https://www.limitless.ai/developers#endpoints
  - type: GettingStarted
    url: https://www.limitless.ai/developers#setup
  - type: RateLimits
    url: rate-limits/limitless-rate-limits.yml
  - type: ErrorCatalog
    url: errors/limitless-problem-types.yml
  - type: DataModel
    url: data-model/limitless-data-model.yml
- aid: limitless:limitless-download-audio-api
  name: Limitless Download Audio API
  description: The Download Audio API from Limitless — 1 operation(s) for download audio.
  humanURL: https://www.limitless.ai/developers
  baseURL: https://api.limitless.ai
  tags:
  - Download Audio
  properties:
  - type: OpenAPI
    url: openapi/limitless-download-audio-api-openapi.yml
  - type: Documentation
    url: https://www.limitless.ai/developers
  - type: APIReference
    url: https://www.limitless.ai/developers#endpoints
  - type: GettingStarted
    url: https://www.limitless.ai/developers#setup
  - type: RateLimits
    url: rate-limits/limitless-rate-limits.yml
  - type: ErrorCatalog
    url: errors/limitless-problem-types.yml
  - type: DataModel
    url: data-model/limitless-data-model.yml
- aid: limitless:limitless-lifelogs-api
  name: Limitless Lifelogs API
  description: The Lifelogs API from Limitless — 2 operation(s) for lifelogs.
  humanURL: https://www.limitless.ai/developers
  baseURL: https://api.limitless.ai
  tags:
  - Lifelogs
  properties:
  - type: OpenAPI
    url: openapi/limitless-lifelogs-api-openapi.yml
  - type: Documentation
    url: https://www.limitless.ai/developers
  - type: APIReference
    url: https://www.limitless.ai/developers#endpoints
  - type: GettingStarted
    url: https://www.limitless.ai/developers#setup
  - type: RateLimits
    url: rate-limits/limitless-rate-limits.yml
  - type: ErrorCatalog
    url: errors/limitless-problem-types.yml
  - type: DataModel
    url: data-model/limitless-data-model.yml
- aid: limitless:limitless-limitless-developer-api-api
  name: Limitless Limitless Developer API API
  description: The Limitless Developer API API from Limitless — 1 operation(s) for limitless developer api.
  humanURL: https://www.limitless.ai/developers
  baseURL: https://api.limitless.ai
  tags:
  - Limitless Developer API
  properties:
  - type: OpenAPI
    url: openapi/limitless-limitless-developer-api-api-openapi.yml
  - type: Documentation
    url: https://www.limitless.ai/developers
  - type: APIReference
    url: https://www.limitless.ai/developers#endpoints
  - type: GettingStarted
    url: https://www.limitless.ai/developers#setup
  - type: RateLimits
    url: rate-limits/limitless-rate-limits.yml
  - type: ErrorCatalog
    url: errors/limitless-problem-types.yml
  - type: DataModel
    url: data-model/limitless-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DeveloperPortal
  url: https://www.limitless.ai/developers
- type: Documentation
  url: https://www.limitless.ai/developers
- type: APIReference
  url: https://www.limitless.ai/developers#endpoints
- type: GettingStarted
  url: https://www.limitless.ai/developers#setup
- type: Website
  url: https://www.limitless.ai/
- type: SignUp
  url: https://app.limitless.ai
- type: Login
  url: https://app.limitless.ai
- type: Support
  url: https://www.limitless.ai/support
- type: HelpCenter
  url: https://help.limitless.ai/
- type: TermsOfService
  url: https://www.limitless.ai/terms
- type: PrivacyPolicy
  url: https://www.limitless.ai/privacy-policy
- type: Privacy
  url: https://www.limitless.ai/privacy
- type: About
  url: https://www.limitless.ai/about
- type: Careers
  url: https://www.limitless.ai/careers
- type: GitHubOrganization
  url: https://github.com/limitless-ai-inc
- type: SourceCode
  url: https://github.com/limitless-ai-inc/limitless-api-examples
- type: MCPServer
  url: mcp/limitless-mcp.yml
- type: AgenticAccess
  url: agentic-access/limitless-agentic-access.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/limitless-llms.txt
- type: Authentication
  url: authentication/limitless-authentication.yml
- type: OAuthScopes
  url: scopes/limitless-scopes.yml
- type: OpenIDConnect
  url: well-known/limitless-openid-configuration.json
- type: WellKnown
  url: well-known/limitless-well-known.yml
- type: Conventions
  url: conventions/limitless-conventions.yml
- type: Conformance
  url: conformance/limitless-conformance.yml
- type: Lifecycle
  url: lifecycle/limitless-lifecycle.yml
- type: Deprecation
  url: https://www.limitless.ai/
- type: RateLimits
  url: rate-limits/limitless-rate-limits.yml
- type: ErrorCatalog
  url: errors/limitless-problem-types.yml
- type: DataModel
  url: data-model/limitless-data-model.yml
- type: Packages
  url: packages/limitless-packages.yml
- type: Overlay
  url: overlays/limitless-developer-overlay.yaml
- type: DomainSecurity
  url: security/limitless-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Limitless

Kin Score

APIs 4

Limitless Chats API

Limitless Download Audio API

Limitless Lifelogs API

Limitless Limitless Developer API API

MCP Servers 1

limitless-mcp.yml

Rate Limits 1

Limitless Rate Limits

Security Posture 2

Limitless Authentication

Limitless Domain Security