LINE Messaging API Skill

Use this skill to run LINE Messaging API operations through uxc + OpenAPI.

Reuse the uxc skill for shared execution, auth, and error-handling guidance.

Prerequisites

• uxc is installed and available in PATH.
• Network access to https://api.line.me.
• Access to the curated OpenAPI schema URL:
  • https://raw.githubusercontent.com/holon-run/uxc/main/skills/line-openapi-skill/references/line-messaging.openapi.json
• A LINE Messaging API channel access token.

Scope

This skill covers a Messaging Core surface:

• bot identity lookup
• user profile lookup
• push and reply message sends
• quota and quota consumption reads
• webhook endpoint get/set/test operations

This skill does not cover:

• inbound webhook receiver runtime
• media/content download flows on api-data.line.me
• audience, narrowcast, rich menu, or account-management surfaces
• the full LINE Messaging API

Authentication

LINE Messaging API uses Authorization: Bearer \x3Cchannel access token>.

Configure one bearer credential and bind it to api.line.me:

uxc auth credential set line-channel \
  --auth-type bearer \
  --secret-env LINE_CHANNEL_ACCESS_TOKEN

uxc auth binding add \
  --id line-channel \
  --host api.line.me \
  --scheme https \
  --credential line-channel \
  --priority 100

Validate the active mapping when auth looks wrong:

uxc auth binding match https://api.line.me

Core Workflow

1. Use the fixed link command by default:

   • command -v line-openapi-cli
   • If missing, create it: uxc link line-openapi-cli https://api.line.me --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/line-openapi-skill/references/line-messaging.openapi.json
   • line-openapi-cli -h

2. Inspect operation schema first:

   • line-openapi-cli get:/v2/bot/info -h
   • line-openapi-cli get:/v2/bot/profile/{userId} -h
   • line-openapi-cli post:/v2/bot/message/push -h

3. Prefer read/setup validation before writes:

   • line-openapi-cli get:/v2/bot/info
   • line-openapi-cli get:/v2/bot/message/quota
   • line-openapi-cli get:/v2/bot/channel/webhook/endpoint

4. Execute with key/value or positional JSON:

   • key/value: line-openapi-cli get:/v2/bot/profile/{userId} userId=U1234567890abcdef
   • positional JSON: line-openapi-cli post:/v2/bot/message/push '{"to":"U1234567890abcdef","messages":[{"type":"text","text":"Hello from UXC"}]}'

Operation Groups

Read / Lookup

• get:/v2/bot/info
• get:/v2/bot/profile/{userId}
• get:/v2/bot/message/quota
• get:/v2/bot/message/quota/consumption
• get:/v2/bot/channel/webhook/endpoint

Messaging

• post:/v2/bot/message/push
• post:/v2/bot/message/reply

Webhook Endpoint Management

• put:/v2/bot/channel/webhook/endpoint
• post:/v2/bot/channel/webhook/test

Guardrails

• Keep automation on the JSON output envelope; do not use --text.
• Parse stable fields first: ok, kind, protocol, data, error.
• Use a channel access token with the scopes required by the target bot/channel configuration.
• post:/v2/bot/message/push and post:/v2/bot/message/reply are write/high-risk operations; require explicit user confirmation before execution.
• replyToken values are short-lived and webhook-derived. Use post:/v2/bot/message/reply only when the caller already has a valid token from a recent event.
• Webhook endpoint get/set/test calls configure delivery only; they do not provide a receiver runtime in uxc.
• This v1 skill stays on https://api.line.me; content retrieval endpoints on https://api-data.line.me are intentionally out of scope.
• line-openapi-cli \x3Coperation> ... is equivalent to uxc https://api.line.me --schema-url \x3Cline_openapi_schema> \x3Coperation> ....

References

• Usage patterns: references/usage-patterns.md
• Curated OpenAPI schema: references/line-messaging.openapi.json
• LINE Messaging API reference: https://developers.line.biz/en/reference/messaging-api/