LangBot is an open-source platform for connecting language models to instant-messaging services so developers can build chatbots that converse, use tools, and execute tasks. It supports bot management, knowledge bases, plugins, and multiple chat platforms, and the catalogue entries provide skills, MCP tools, and instructions for working with it.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/langbot-app/langbot/langbot-mcp-opsnpx skills add langbot-app/LangBot --skill langbot-mcp-opsgit clone --depth 1 https://github.com/langbot-app/LangBotWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/langbot-app/langbot/langbot-mcp-ops)<a href="https://agentmods.dev/skills/langbot-app/langbot/langbot-mcp-ops"><img src="https://agentmods.dev/badge/skills/langbot-app/langbot/langbot-mcp-ops.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00125 | $0.01247 |
| Opus 5 | $0.00063 | $0.00624 |
| Sonnet 5 | $0.00025 | $0.00249 |
| Haiku 4.5 | $0.00013 | $0.00125 |
Grade A, and why
langbot-mcp-ops scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
LangBot MCP Operations
LangBot exposes an MCP server so AI agents can manage an instance programmatically. It mirrors a curated subset of the HTTP service API.
Endpoint
http://<langbot-host>:5300/mcp
Transport: streamable HTTP (stateless, JSON responses). Same host/port as the web UI and HTTP API.
Authentication
Reuses the same API keys as the HTTP API. Send either header:
X-API-Key: <api-key>
# or
Authorization: Bearer <api-key>
Two kinds of key are accepted:
- Web-UI key — created in the web UI (sidebar → API Keys), prefixed
lbk_. The secret is shown once; only its SHA-256 hash is stored. Each key is bound to one Workspace and has explicit scopes, status, optional expiry, and last-used metadata. The key determines the Workspace; callers cannot switch it withX-Workspace-Id. - Global API key — set in
data/config.yamlunderapi.global_api_key. Requires no login session and no DB record; does not need thelbk_prefix. It is accepted only by a community instance with exactly one local Workspace and is disabled for SaaS multi-Workspace operation. Leave empty to disable. See thelangbot-deployskill for config details.
Invalid, revoked, or expired keys get 401 Unauthorized. A valid key whose
scopes do not authorize a tool gets 403 Forbidden.
Client configuration
{
"mcpServers": {
"langbot": {
"url": "http://<langbot-host>:5300/mcp",
"headers": { "X-API-Key": "<api-key>" }
}
}
}
Tool surface
The tools wrap the LangBot service layer. Current tools (v1):
| Tool | Purpose |
|---|---|
get_system_info |
Version, edition, instance id |
list_bots / get_bot / create_bot / update_bot / delete_bot |
Manage messaging-platform bots (secrets redacted on read) |
list_pipelines / get_pipeline / create_pipeline / update_pipeline / delete_pipeline |
Manage pipelines |
list_llm_models / get_llm_model / list_embedding_models / list_model_providers |
Inspect models & providers |
list_knowledge_bases / get_knowledge_base / retrieve_knowledge_base |
RAG knowledge bases (incl. semantic search) |
list_mcp_servers |
External MCP servers LangBot connects to (as a client) |
list_skills / get_skill |
Installed skills |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 6d ago First seen · 111 lines · 125 tokens per session scan A 5ea25f64ae9f
langbot-mcp-ops is a skill published in the GitHub repository langbot-app/LangBot (17,653 stars, last pushed yesterday), licensed Apache-2.0. It adds 125 tokens to every session and 1,247 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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