PASAR API

🇲🇾 LangSmith LLM Observability & Evals

← directory
LangChainBackend & devtoolstier: commercialauth: API keypricing: freemiumverified 2026-06-15

LLM observability and evaluation platform for tracing, testing and debugging AI agent applications. REST API at api.smith.langchain.com. Free Developer: 5k traces/month.

View docs ↗ More Backend & devtools APIs

Get started

# LangSmith LLM Observability & Evals needs an API key.
# No single public base URL ~ start from the docs:
# https://docs.langchain.com/langsmith

AI prompt

I'm integrating a Malaysia API into my app.

API: LangSmith LLM Observability & Evals
Provider: LangChain
Auth: requires an API key (sign up: https://docs.langchain.com/langsmith)
Pricing: freemium
Important note: LLM observability and evaluation platform for tracing, testing and debugging AI agent applications. REST API at api.smith.langchain.com. Free Developer: 5k traces/month.

Source: LangChain (https://docs.langchain.com/langsmith)
Source type: Provider API or developer docs
Endpoint type: Docs-first integration
Integration difficulty: Needs API key
Last checked: 2026-06-15
Production caveat: Keep credentials server-side and confirm current limits, pricing, and webhook/error behaviour in the provider docs.

Help me set up the correct onboarding/authentication path and make the first valid request ~ explain exactly where credentials go and what must happen before production.

Related Backend & devtools APIs

Calendarific ~ Malaysia public holidays APISupabaseFirebaseCloudflare WorkersVercelNeonUpstashPlanetScaleTursoAppwrite