docs.langchain.com llms.txt
In short
docs.langchain.com serves a 3.1 KB llms.txt with 2 H2 sections and 17 links, graded A on the llmstxt.org structure (6 of 6 checks). It passes every check. The home page links the file. Read 4 November 2026. The file is one of 2,529 plain-text llms.txt files in this edition of the index.
llms.txt 3.1 KB, 30 lines
# Docs by LangChain
> Documentation for LangSmith, Fleet, and our open source packages.
- [AGENT DEVELOPMENT LIFECYCLE (1518 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE.
- [PRODUCTS AND SETUP (223 pages)](https://docs.langchain.com/_llms/products-and-setup.txt): Documentation for PRODUCTS AND SETUP.
## OpenAPI Specs
- [agent-server-openapi](/langsmith/agent-server-openapi.json)
- [openapi](https://api.host.langchain.com/openapi.json)
- [langsmith-platform-openapi](/langsmith/langsmith-platform-openapi.json)
> The links below point to documentation indexes. Follow each `/_llms/` index recursively until you reach documentation pages.
## Indexes
- [AGENT DEVELOPMENT LIFECYCLE (1518 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE.
- [AGENT DEVELOPMENT LIFECYCLE / Build (482 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build.txt): Build agents with open source
- [AGENT DEVELOPMENT LIFECYCLE / Build / Python (244 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build/python.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE / Build / Python.
- [AGENT DEVELOPMENT LIFECYCLE / Build / TypeScript (251 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/build/type-script.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE / Build / TypeScript.
- [AGENT DEVELOPMENT LIFECYCLE / Deploy (253 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/deploy.txt): Ship agents to production
- [AGENT DEVELOPMENT LIFECYCLE / Deploy / Get started (145 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/deploy/get-started.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE / Deploy / Get started.
- [AGENT DEVELOPMENT LIFECYCLE / Monitor (705 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor.txt): Trace, debug, and observe agents
- [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference (604 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor/reference.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference.
- [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API (596 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor/reference/lang-smith-rest-api.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API.
- [AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API / Administration (154 pages)](https://docs.langchain.com/_llms/agent-development-lifecycle/monitor/reference/lang-smith-rest-api/administration.txt): Documentation for AGENT DEVELOPMENT LIFECYCLE / Monitor / Reference / LangSmith REST API / Administration.
- [PRODUCTS AND SETUP (223 pages)](https://docs.langchain.com/_llms/products-and-setup.txt): Documentation for PRODUCTS AND SETUP.
- [PRODUCTS AND SETUP / LangSmith setup (152 pages)](https://docs.langchain.com/_llms/products-and-setup/lang-smith-setup.txt): Hosting and administration
First 29 of 30 lines.
Parse graded A, 6 of 6
file: https://docs.langchain.com/llms.txt
Docs by LangChain
Documentation for LangSmith, Fleet, and our open source packages.
2 sections, 17 links, no Optional section.
Ora's cached score: 68, grade C, scanned 21 August 2026.
The parse
docs.langchain.com lists 17 links: 17 point at langchain.com or a relative path, 0 point elsewhere. The hosts it links most: docs.langchain.com (14), api.host.langchain.com (1).
| H2 section | Links |
|---|---|
| OpenAPI Specs | 3 |
| Indexes | 12 |
Grade against the llmstxt.org structure
The file passes all six checks. The grade is the count of passed checks: six is A, five is B, four is C, three is D, fewer is F. It measures structure only. Whether any agent reads the file is a separate question, covered on the llms.txt reference.
| Check | Result | Detail |
|---|---|---|
| Starts with an H1 naming the site or project | Pass | H1: Docs by LangChain |
| Has a blockquote summary under the H1 | Pass | Blockquote summary found. |
| Has at least one H2 section that lists links | Pass | 2 H2 sections, 2 with links. |
| At least 80 percent of links point at the same site | Pass | 17 of 17 links stay on langchain.com (100 percent). |
| Under 100 KB | Pass | 3129 bytes as served. |
| Plain markdown, no HTML | Pass | No HTML document markers in the body. |
Ora's cached score
Ora's cached report for docs.langchain.com gives it 68 of 100, grade C, scanned on 21 August 2026. Its Access layer, which holds the read-layer checks below, scored 33 of 68 check points. Read from GET ora.ai/api/score/docs.langchain.com on 5 November 2026. The score is Ora's, not this site's, and the structure grade above is a different measure: it grades the llms.txt file against the llmstxt.org proposal, while Ora's score covers the whole site. Ora's report for docs.langchain.com has every layer.
| Ora check (Access layer) | Result | Points |
|---|---|---|
| Sitemap exists | Pass | 2 of 2 |
| Content without JavaScript | Pass | 2 of 3 |
| Not blocked by bot detection | Pass | 2 of 2 |
| Markdown URL fallback | Partial | 1 of 2 |
| llms.txt exists | Pass | 1 of 1 |
| llms.txt formatting | Pass | 2 of 2 |
| JSON-LD structured data | Partial | 2 of 4 |
| Metadata completeness | Pass | 2 of 2 |
| llms.txt links resolve | Pass | 2 of 2 |
| Markdown alternate link | Pass | 1 of 1 |
| Redirect hygiene | Pass | 1 of 1 |
| Page token budget | Pass | 1 of 1 |
| Code fence validity | Pass | 1 of 1 |
| Content behind auth | Pass | 2 of 2 |
| OpenAPI spec published | Fail | 0 of 7 |
| Markdown agent docs | Pass | 1 of 1 |
| Markdown negotiation with Vary | Pass | 1 of 1 |
| Markdown for agent user agents | Fail | 0 of 1 |
| Agent crawler reachability | Pass | 2 of 2 |
Linking and the companion file
The home page of docs.langchain.com links the file in its HTML. Ora's lab found (2026-10-19) that 86 percent of llms.txt fetches by agents arrived through a link, so an unlinked file is mostly a file nobody opens.
How it compares
At 3.1 KB the file is larger than 17 percent of the 2,529 plain-text llms.txt files in this edition, and its 17 links put it ahead of 29 percent of them on link count. The home page declares no generator. Size bucket: 2 to 10 KB. Curated example. Category: Framework.
Why it is in the index: Short index for a large docs set. Owner as listed: LangChain.
Live file: https://docs.langchain.com/llms.txt. Read 4 November 2026. If the file has since changed or gone, the live URL is the authority; this page records what the crawl read on that date.
Sources
- docs.langchain.com llms.txt https://docs.langchain.com/llms.txt, read 4 November 2026
- llms.txt proposal (llmstxt.org) https://llmstxt.org/, read 4 November 2026
- Tranco list 746WX (crawl universe) https://tranco-list.eu/list/746WX, read 4 November 2026
- Ora: AgentReady launch post (the 86 percent finding) https://ora.ai/blog/agentready-launch, read 4 November 2026
- Ora llms.txt (GET /api/score/{domain} looks up a cached score) https://ora.ai/llms.txt, read 5 November 2026
Last reviewed 5 November 2026