# LINE

**Canonical:** https://apis.io/providers/line/  
**Website:** https://line.me  
**APIs profiled:** 10

LINE is a Japan-based messaging platform operated by LY Corporation, with over 200 million monthly active users across Japan, Taiwan, Thailand and Indonesia, offering messaging, payments, news and a broad ecosystem of services. The LINE Developers platform exposes public APIs for building chatbots and Official Accounts (Messaging API), issuing and rotating credentials (Channel Access Token API), reading delivery and audience analytics (Insight API), building marketing audiences (Manage Audience API), running web apps inside the LINE client (LIFF), and social login via LINE Login v2.1 over OAuth 2.0 and OpenID Connect. LINE publishes nine first-party OpenAPI documents covering 111 operations at github.com/line/line-openapi and generates all six official server SDKs from them. Server API calls authenticate with a channel access token presented as an HTTP Bearer credential and scoped to a single LINE channel.

## Kin Score — 71.6 / 100 (exemplar)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 71.6).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 59.0 |
| Governance | 43.9 |
| Contract Governance | 43.9 |
| Operational Transparency | 84.2 |
| Developer Ergonomics | 80.4 |
| Commercial Clarity | 76.3 |
| Access Clarity | 76.3 |

## Agent readiness — 54.7 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | documented |
| Error Semantics | verified |
| OpenAPI Examples | verified |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup, free tier metered on messages sent — onboarding: self-serve, pricing: freemium, trial: yes (confidence: high).

## APIs (10)

- **LINE Messaging API** — The core LINE bot API — 73 operations for replying, pushing, multicasting, broadcasting and narrowcasting messages to LINE users, plus rich menus, Flex messages, group and room ...
- **LINE Messaging API Webhook** — The inbound event surface of the Messaging API, published by LINE as an OpenAPI type-definition document. LINE delivers CallbackRequest envelopes to the bot server's configured ...
- **LINE Channel Access Token API** — Issues, verifies and revokes the channel access tokens every other LINE server API consumes. Four generations run concurrently: long-lived tokens from the Developers Console, v2...
- **LINE Insight API** — Seven read operations returning analytics for a LINE Official Account — friend demographics, number of followers, number of message deliveries by day, per-request message event ...
- **LINE Manage Audience API** — Twelve operations for building and managing the marketing audiences a narrowcast targets — creating audiences from uploaded user IDs by JSON or by file, click-based and impressi...
- **LIFF Server API** — Four operations for managing LINE Front-end Framework apps on a LINE Login channel — add, list, update and delete LIFF apps. LIFF apps are web applications that run inside the L...
- **LINE Module API** — Four operations for the module feature, which lets a partner-operated module channel take and release chat control on behalf of a LINE Official Account — detach a module, acquir...
- **LINE Module Attach API** — A single operation that attaches a module channel to a LINE Official Account and returns the resulting bot and scope grant. The only operation across LINE's nine published speci...
- **LINE Mission Sticker API** — A single operation for the Mission Sticker programme, granting a user a sticker reward after they complete a defined mission with a corporate LINE Official Account. Available on...
- **LINE Login v2.1** — End-user authentication and authorization over OAuth 2.0 authorization code grant and OpenID Connect. Authorization runs at access.line.me; token, userinfo, revocation and JWKS ...

## MCP servers (2)

- **MCP Server**
- **MCP Server manifest** — First-party Model Context Protocol server published by LY Corporation that wraps the LINE Messaging API so an AI agent can drive a LINE Official Account — pushing and broadcasti...

## Agentic access (1)

- **Line Agentic Access** — 111 operations · 59 acting · 4 human-in-the-loop

## Security (3)

- **Line Authentication** — http/oauth2/openIdConnect · 3 schemes
- **Line Domain Security** — TLSv1.3 · HSTS · DMARC
- **Line Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Line Plans Pricing**

## Tags

Messaging, Chatbots, Social Login, Mini Apps, Marketing, Webhook, OpenID Connect, Audience, Analytics, Japan

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/line/). Scores are computed from the provider's own public artifacts under a published rubric.