LangSmith API

AI · Operational · 30d uptime 100%
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Take agents from prototype to production. LangSmith gives you the tools to build, debug, evaluate, and ship reliable agents.

Trust signals

Pricing
FREEMIUM
Auth
API_KEY
CORS
No
Rate limit
Plan-based ingest limits
Health
201ms
Trust score
89 (B)

Last checked Oct 19, 2026 · uptime 24h 100% / 7d 100% / 30d 100%

Strong candidate; weakest signal is CORS.

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Integration checklist

  • Auth is API_KEY— no credit card required
  • No CORS — route calls through your backend.
  • Rate limit: Plan-based ingest limits
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LangSmith API — pricing, auth, CORS & health | Reqistry