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Categories: Development Resources & Utilities

LangChain provides create_agent: a minimal, highly configurable agent harness. Compose exactly the agent your use case needs from model, tools, prompt, and middleware.

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Updated: 2026-09-01 11:02 Language: English (default) Access: Normal

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Docs by LangChain Full homepage screenshot

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality. Several search or sharing settings need attention. Together they may make snippets, preview images or preferred URLs less consistent across platforms.

Domain and Registration

Registered in 2019, this domain has about 6 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is GoDaddy.com, LLC, a widely used domain service provider. The domain uses the common .com extension, which is not an independent safety signal.

DNS and Email

Nameservers are provided by Google Cloud DNS, indicating managed DNS hosting. MX records point to the Google Workspace email service. DNSSEC is enabled, allowing validating resolvers to authenticate signed DNS data. CAA records restrict which certificate authorities are authorized to issue certificates. SPF and DMARC are configured. DKIM status is unknown.

TLS and Certificates

The public key uses EC with 256 bits. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued by Let's Encrypt, commonly associated with automated certificate services. The certificate's total validity is about 89 days, consistent with a short renewal cycle.

HTTP and Browser Security

The response lacks these common security headers: X-Content-Type-Options, Referrer-Policy, Permissions-Policy. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. The cf-ray response header indicates a CDN or caching proxy in the delivery path. No obvious internal addresses or debug information were found in the headers. The Server header identifies cloudflare without an exact version.

Technology Stack Analysis

The public page identifies Mintlify, Next.js, Cloudflare, Vercel without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

No homepage meta description was detected, leaving snippet selection more dependent on page text. The Generator tag identifies Mintlify, making the publishing system easier to fingerprint. Open Graph is partially configured; og:description is missing. Twitter Card metadata is configured. JSON-LD includes Organization data, helping describe the organization as an entity.

Hosting and Email

DNSGoogle Cloud DNS
HostingVercel
EmailGoogle Workspace
Location United States flagUnited States 162.159.143.13

Pages, Search and Sharing

Meta descriptionNot detected
Canonical URLhttps://docs.langchain.com
LanguageEnglish (default)
Twitter Cardsummary_large_image

Social Sharing Preview

7 fields

robots.txt (opens in a new tab)

3 rules
All bots 1 allowed · 2 disallowed
  • Allow/_next/image
  • Disallow/cdn-cgi/
  • Disallow/_next/

Sitemaps

1

Registration details RDAP / WHOIS

RegistrarGoDaddy.com, LLC
Registered2019-12-03
Expires2029-12-03
Domain statusclient delete prohibited、client renew prohibited、client transfer prohibited、client update prohibited
Nameserversns-cloud-c1.googledomains.com、ns-cloud-c2.googledomains.com、ns-cloud-c3.googledomains.com、ns-cloud-c4.googledomains.com
DNSSECsigned

DNS records

TypeNameValueTTLPriority
Adocs.mintlify.builders162.159.143.13132—
Adocs.mintlify.builders172.66.3.9132—
AAAAdocs.mintlify.builders2606:4700:7::2fd218—
AAAAdocs.mintlify.builders2a06:98c1:58::2fd218—
MXlangchain.comsmtp.google.com3001
NSlangchain.comns-cloud-c1.googledomains.com21600—
NSlangchain.comns-cloud-c2.googledomains.com21600—
NSlangchain.comns-cloud-c3.googledomains.com21600—
NSlangchain.comns-cloud-c4.googledomains.com21600—
TXTlangchain.comMS=ms602026303590—
TXTlangchain.comgoogle-site-verification=MZV-DrUglhroyDj0lCk7AP5YOKy4GGEgUaIyLjCXEb83590—
TXTlangchain.comgoogle-site-verification=d192uA19ZkwkREu9NZKM9hxDB1t90uIMHp5gFbBBuzw3590—
TXTlangchain.comgoogle-site-verification=nezqC2hbpeFSFJDIKE_6_ADSKsl4j9dTvwk782NSL9E3590—
TXTlangchain.comgoogle-site-verification=wP16h2Joxep73RW-Hb8fneAizDK4FCn_6a4DnsbOdrM3590—
TXTlangchain.comgoogle-site-verification=wUPxN5SwJJSQGceU6cVjpkHI-08DZaqJSlAgg_55nj43590—
TXTlangchain.comlinkedin-site-verification=f15545d4-d50f-424a-9076-ceebd5e914243590—
TXTlangchain.comv=spf1 include:_spf.google.com include:242623570.spf06.hubspotemail.net include:servers.mcsv.net ~all3590—
TXTlangchain.comxbuvf8ogot3590—
CNAMEdocs.langchain.comdocs.mintlify.builders3600—
CAAlangchain.com0 issue "amazon.com"300—
CAAlangchain.com0 issue "digicert.com; cansignhttpexchanges=yes"300—
CAAlangchain.com0 issue "letsencrypt.org"300—
CAAlangchain.com0 issue "pki.goog; cansignhttpexchanges=yes"300—
CAAlangchain.com0 issue "sectigo.com"300—
CAAlangchain.com0 issuewild "digicert.com; cansignhttpexchanges=yes"300—
CAAlangchain.com0 issuewild "letsencrypt.org"300—
CAAlangchain.com0 issuewild "pki.goog; cansignhttpexchanges=yes"300—
CAAlangchain.com0 issuewild "sectigo.com"300—
DSlangchain.com46015 8 2 2dba2d592d013018c193153068e3b80c7f878f5ae3f5d6f3051e791b30242cc486400—
DMARC_dmarc.langchain.comv=DMARC1; p=reject; sp=reject; pct=100; adkim=r; aspf=r; rua=mailto:[email protected],mailto:[email protected]; ruf=mailto:[email protected]; fo=1300—

TLS and certificates

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subjectdocs.langchain.com
IssuerLet's Encrypt
Valid until2026-11-10T19:09 · Remaining when checked: 70 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HeaderValue
content-typetext/html; charset=utf-8
cache-controlno-store, no-cache, must-revalidate, proxy-revalidate, max-age=0
servercloudflare
strict-transport-securitymax-age=63072000
content-security-policyworker-src * blob: data: 'unsafe-eval' 'unsafe-inline'; object-src data: ; base-uri 'self'; upgrade-insecure-requests; frame-ancestors 'self' https://dashboard.mintlify.com https://app.mintlify.com; form-action 'self' https://codesandbox.io;
x-frame-optionsDENY

Identified technologies

MintlifyNext.jsCloudflareVercel

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