GET langchain.com HTTP 200114 ms15.7 KB$0.000352 captured Aug 7, 2026
langchain.com, as data
One API turns any langchain.com page into markdown, structured JSON, its link graph or a screenshot, and crawls the whole site the same way. The panel shows the real response we captured.
- Render mode
- Plain HTTP, no browser needed
- Response
- HTTP 200 in 114 ms
- Page size
- 15.7 KB of markdown, 227 lines
- Fields
- Component name, Description, Code example, Parameters and 3 more
- Captured
- Aug 7, 2026
Free balance on signup, no card. This langchain.com page cost $0.000352 to fetch.
Observe, evaluate, and deploy agents with LangSmith.LangSmith is framework-agnostic: trace your preferred framework or integrate LangSmith with any agent stack using our Python, TypeScript, Go, or Java SDKs.LangSmith EngineObservabilityEvaluationDeploymentFleet#### Improve agents faster with LangSmith EngineSurface and diagnose undetected issues autonomously to improve agents faster. LangSmith Engine clusters production failures into prioritized issues, finds the root cause in your traces and code, and proposes the fix for your review.#### Understand exactly what your agent is doingAgents can be hard to debug and understand. Long context, branching logic, and many tools make it difficult to pinpoint where things went wrong. Tracing breaks each run into a structured timeline of steps so you can see exactly what happened, in what order, and why.* *Native tracing for popular agent frameworks and OpenTelemetry** *SDKs for Python, TypeScript, Go, and Java** *Message threading for multi-turn chat interactions** *Analytics and AI-driven insights to uncover patterns across traces*#### Use real-world usage for iterative improvementCapture production traces, turn them into test cases, and score agents with a mix of human review and automated evals. Each iteration makes your agent measurably better.* *Reusable LLM-as-judge and multi-turn evals** *Eval calibration with human feedback** *Human feedback annotations*#### Ship and scale agents in productionUnlike traditional web apps, agents work for long durations and need to handle async collaboration with humans and other agents. The agent server provides memory, conversational threads, and durable checkpointing out of the box - on infrastructure that’s fault-tolerant and scales to handle any workload.* *Supports human-in-the-loop interactions, input concurrency, and background agents*What Spider does on langchain.com
Same key, five endpoints. The numbers under a cell were measured on this page.
Page to markdown
Clean text for RAG and LLM context, boilerplate removed. The lane that runs without a key.
114 ms · $0.000352Page to JSON
Spider reads the page and names the fields. Pass your own schema when you need exact keys.
Rendered capture
Real Chromium, full-page PNG. The same call also returns the rendered HTML.
The call behind the panel
This request produced the response above. Paste it with your key and you get the same bytes.
curl -X POST https://api.spider.cloud/scrape \
-H "Authorization: Bearer $SPIDER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"url": "https://langchain.com/", "return_format": "markdown"}'from spider import Spider
app = Spider()
params = {"return_format": "markdown"}
page = app.scrape_url("https://langchain.com/", params=params)
print(page[0]["content"])import { Spider } from "@spider-cloud/spider-client";
const app = new Spider();
const [page] = await app.scrapeUrl("https://langchain.com/", {
return_format: "markdown",
});
console.log(page.content);What langchain.com costs
Multiplied from the measured 15.7 KB page. Estimates round to the cent.
1 GB of transfer costs $1, plus $0.001 per CPU minute, and failed requests cost $0. Crawling daily? The Unlimited plan is a flat monthly rate.
Point this at the rest of langchain.com.
The capture above took 114 ms and cost $0.000352. The same call takes any URL on langchain.com.