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Back to Integrations

LangSmith

Forward workflow runs to LangSmith for observability

LangSmith is a Observabilityintegration for Sim, the AI workspace where teams build and deploy AI agents. Sim's LangSmith integration provides 2 LangSmith tools that AI agents can use inside Sim's visual workflow builder. LangSmith connects with an API key. Free to start at sim.ai.

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Last updated June 12, 2026

Overview

Send run data to LangSmith to trace executions, attach metadata, and monitor workflow performance.

How to automate LangSmith with Sim

  1. 01

    Create a free account

    Sign up at sim.ai in seconds. No credit card required. Your workspace is ready immediately.

  2. 02

    Add a LangSmith block

    Open your workspace, drag a LangSmith block onto the workflow builder, and paste in your LangSmith API key.

  3. 03

    Configure, connect, and run

    Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your LangSmith automation is live.

Agent templates

Ready-to-use templates featuring LangSmith. Click any to build it instantly.

Supported tools

2 LangSmith tools available in Sim

Create Run

Forward a single run to LangSmith for ingestion.

Create Runs Batch

Forward multiple runs to LangSmith in a single batch.

Frequently asked questions

Sim's LangSmith integration adds 2 LangSmith tools to the AI agents you build in Sim's visual workflow builder — no code required. Forward workflow runs to LangSmith for observability. Teams often pair LangSmith with Linear and Rippling in the same agent.

You can create Run and create Runs Batch with LangSmith in Sim. Each runs as a tool inside an AI agent block, so an agent can chain LangSmith with services like Linear and Rippling and apply LLM reasoning between steps.

Connecting LangSmith takes about five minutes: (1) Create a free account at sim.ai. (2) Create an agent in your workspace. (3) Drag a LangSmith block onto the workflow builder. (4) Paste your LangSmith API key to authenticate — you can find it in your LangSmith account settings. (5) Pick a tool such as "Create Run", wire up its inputs, and click Run — your agent is live.

Add a LangSmith block to your agent and select "Create Run" as the tool. Forward a single run to LangSmith for ingestion. Fill in the required fields — inputs can reference outputs from earlier steps, such as text generated by an AI block or data fetched from another integration. No code is required.

Linear

Interact with Linear issues, projects, and more

Rippling

Manage workers, departments, custom objects, and company data in Rippling

Mailchimp

Manage audiences, campaigns, and marketing automation in Mailchimp

GitHub

Interact with GitHub or trigger workflows from GitHub events

Sim

Start automating LangSmith today

Build your first AI agent with LangSmith in minutes. Connect to every tool your team uses. Free to start, no credit card required.