LangSmith
LangSmith is the observability, debugging, and evaluation platform for LLM applications, built by LangChain. The LangSmith API exposes tracing, dataset management, evaluation, prompt-hub, and Fleet agent functionality for AI engineering teams.
LangSmith publishes 73 APIs on the APIs.io network, including access_policies API, ace API, agents API, and 70 more. Tagged areas include AI, LLM, Observability, Evaluations, and LangChain.
LangSmith’s developer surface includes authentication, documentation, pricing, engineering blog, and 6 more developer resources.
Kin Score
APIs 73
Individual APIs this provider publishes, each with its own machine-readable definition.
LangSmith access_policies API
The access_policies API from LangSmith — 3 operation(s) for access_policies.
LangSmith ace API
The ace API from LangSmith — 1 operation(s) for ace.
LangSmith agents API
The agents API from LangSmith — 2 operation(s) for agents.
LangSmith alert_rules API
The alert_rules API from LangSmith — 3 operation(s) for alert_rules.
LangSmith annotation-queues API
The annotation-queues API from LangSmith — 17 operation(s) for annotation-queues.
LangSmith api-key API
The api-key API from LangSmith — 4 operation(s) for api-key.
LangSmith audit-logs API
The audit-logs API from LangSmith — 1 operation(s) for audit-logs.
LangSmith auth API
The auth API from LangSmith — 7 operation(s) for auth.
LangSmith aws_marketplace API
The aws_marketplace API from LangSmith — 1 operation(s) for aws_marketplace.
LangSmith backfills API
The backfills API from LangSmith — 1 operation(s) for backfills.
LangSmith beacon API
The beacon API from LangSmith — 1 operation(s) for beacon.
LangSmith bulk-exports API
The bulk-exports API from LangSmith — 7 operation(s) for bulk-exports.
LangSmith charts API
The charts API from LangSmith — 13 operation(s) for charts.
LangSmith comments API
The comments API from LangSmith — 3 operation(s) for comments.
LangSmith commits API
The commits API from LangSmith — 2 operation(s) for commits.
LangSmith data_planes API
The data_planes API from LangSmith — 1 operation(s) for data_planes.
LangSmith datasets API
The datasets API from LangSmith — 28 operation(s) for datasets.
LangSmith directories API
The directories API from LangSmith — 2 operation(s) for directories.
LangSmith evaluators API
The evaluators API from LangSmith — 2 operation(s) for evaluators.
LangSmith examples API
The examples API from LangSmith — 9 operation(s) for examples.
LangSmith experiment-view-overrides API
The experiment-view-overrides API from LangSmith — 2 operation(s) for experiment-view-overrides.
LangSmith experiments API
The experiments API from LangSmith — 1 operation(s) for experiments.
LangSmith features API
The features API from LangSmith — 4 operation(s) for features.
LangSmith feedback API
The feedback API from LangSmith — 7 operation(s) for feedback.
LangSmith feedback-configs API
The feedback-configs API from LangSmith — 1 operation(s) for feedback-configs.
LangSmith fleet auth API
The fleet auth API from LangSmith — 10 operation(s) for fleet auth.
LangSmith fleet github-app API
The fleet github-app API from LangSmith — 9 operation(s) for fleet github-app.
LangSmith fleet integrations API
The fleet integrations API from LangSmith — 3 operation(s) for fleet integrations.
LangSmith fleet mcp API
The fleet mcp API from LangSmith — 7 operation(s) for fleet mcp.
LangSmith fleet threads API
The fleet threads API from LangSmith — 5 operation(s) for fleet threads.
LangSmith fleet usage API
The fleet usage API from LangSmith — 4 operation(s) for fleet usage.
LangSmith fleet_webhooks API
The fleet_webhooks API from LangSmith — 1 operation(s) for fleet_webhooks.
LangSmith gateway API
The gateway API from LangSmith — 4 operation(s) for gateway.
LangSmith gateway-policies API
The gateway-policies API from LangSmith — 2 operation(s) for gateway-policies.
LangSmith hub_environments API
The hub_environments API from LangSmith — 2 operation(s) for hub_environments.
LangSmith info API
The info API from LangSmith — 2 operation(s) for info.
LangSmith integrations API
The integrations API from LangSmith — 1 operation(s) for integrations.
LangSmith likes API
The likes API from LangSmith — 1 operation(s) for likes.
LangSmith mcp API
The mcp API from LangSmith — 2 operation(s) for mcp.
LangSmith mcp_vendors API
The mcp_vendors API from LangSmith — 6 operation(s) for mcp_vendors.
LangSmith me API
The me API from LangSmith — 4 operation(s) for me.
LangSmith metrics API
The metrics API from LangSmith — 1 operation(s) for metrics.
LangSmith model-price-map API
The model-price-map API from LangSmith — 2 operation(s) for model-price-map.
LangSmith nps API
The nps API from LangSmith — 1 operation(s) for nps.
LangSmith oauth API
The oauth API from LangSmith — 8 operation(s) for oauth.
LangSmith Ok API
The Ok API from LangSmith — 1 operation(s) for ok.
LangSmith optimization-jobs API
The optimization-jobs API from LangSmith — 4 operation(s) for optimization-jobs.
LangSmith Organizations API
The Organizations API from LangSmith — 1 operation(s) for organizations.
LangSmith orgs API
The orgs API from LangSmith — 39 operation(s) for orgs.
LangSmith ownerships API
The ownerships API from LangSmith — 1 operation(s) for ownerships.
LangSmith playground-settings API
The playground-settings API from LangSmith — 2 operation(s) for playground-settings.
LangSmith prompt-webhooks API
The prompt-webhooks API from LangSmith — 3 operation(s) for prompt-webhooks.
LangSmith prompts API
The prompts API from LangSmith — 2 operation(s) for prompts.
LangSmith public API
The public API from LangSmith — 20 operation(s) for public.
LangSmith repos API
The repos API from LangSmith — 5 operation(s) for repos.
LangSmith run API
The run API from LangSmith — 19 operation(s) for run.
LangSmith runs API
The runs API from LangSmith — 7 operation(s) for runs.
LangSmith sandboxes API
The sandboxes API from LangSmith — 12 operation(s) for sandboxes.
LangSmith sandboxes-internal API
The sandboxes-internal API from LangSmith — 1 operation(s) for sandboxes-internal.
LangSmith SCIM Tokens API
The SCIM Tokens API from LangSmith — 2 operation(s) for scim tokens.
LangSmith service-accounts API
The service-accounts API from LangSmith — 2 operation(s) for service-accounts.
LangSmith sessions API
The sessions API from LangSmith — 1 operation(s) for sessions.
LangSmith settings API
The settings API from LangSmith — 2 operation(s) for settings.
LangSmith skills API
The skills API from LangSmith — 2 operation(s) for skills.
LangSmith tag-transitions API
The tag-transitions API from LangSmith — 1 operation(s) for tag-transitions.
LangSmith tags API
The tags API from LangSmith — 2 operation(s) for tags.
LangSmith tenant API
The tenant API from LangSmith — 1 operation(s) for tenant.
LangSmith threads API
The threads API from LangSmith — 2 operation(s) for threads.
LangSmith tools API
The tools API from LangSmith — 3 operation(s) for tools.
LangSmith tracer-sessions API
The tracer-sessions API from LangSmith — 14 operation(s) for tracer-sessions.
LangSmith TTL Settings API
The TTL Settings API from LangSmith — 2 operation(s) for ttl settings.
LangSmith usage-limits API
The usage-limits API from LangSmith — 3 operation(s) for usage-limits.
LangSmith workspaces API
The workspaces API from LangSmith — 25 operation(s) for workspaces.
Scroll for all 73
Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
LangSmith
OPEN COLLECTIONPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Langsmith Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Langsmith Finops
FINOPSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API