# LangBot

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 3 of 5 capability checks passed.

- host: langbot.app
- url: https://langbot.app/
- category: ai agent platform
- type: saas
- language: zh

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 3 of 5 checks passed.

- fail — Markdown negotiation
- PASS — Markdown twin at a predictable URL
- fail — llms.txt
- PASS — API catalog
- PASS — MCP server answers

MCP tools (from tools/list on 2026-08-23, served from docs.langbot.app): search_lang_bot, query_docs_filesystem_lang_bot, submit_feedback

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **register** — "开始构建" → `https://langbot.app`
- **contact** — "联系我们"

## Summary

LangBot is an open-source multi-tenant instant messaging AI agent platform supporting QQ, WeChat, Feishu, DingTalk, and more.

## Context

34 sites in this index share the category "ai agent platform"; 15 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark