LangChain
LangChain is a comprehensive ecosystem for building and deploying AI agents, consisting of open-source frameworks and an agent engineering platform called LangSmith. The company offers two main frameworks: LangChain, which enables rapid development with pre-built agent architectures and model integrations, and LangGraph, which provides low-level primitives for building custom agent workflows with greater control.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles LangChain the way a machine reads it — 74 machine-readable artifacts across 66 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — LangChain scores 44.7/100 (thin), with a separate agent-readiness read of 48/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile LangChain
Each block below is one kind of artifact we hold for LangChain. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 66
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
LangChain access_policies API
The access_policies API from LangChain — 3 operation(s) for access_policies.
LangChain ace API
The ace API from LangChain — 1 operation(s) for ace.
LangChain alert_rules API
The alert_rules API from LangChain — 3 operation(s) for alert_rules.
LangChain annotation-queues API
The annotation-queues API from LangChain — 17 operation(s) for annotation-queues.
LangChain api-key API
The api-key API from LangChain — 4 operation(s) for api-key.
LangChain audit-logs API
The audit-logs API from LangChain — 1 operation(s) for audit-logs.
LangChain auth API
The auth API from LangChain — 7 operation(s) for auth.
LangChain aws_marketplace API
The aws_marketplace API from LangChain — 1 operation(s) for aws_marketplace.
LangChain backfills API
The backfills API from LangChain — 1 operation(s) for backfills.
LangChain beacon API
The beacon API from LangChain — 1 operation(s) for beacon.
LangChain bulk-exports API
The bulk-exports API from LangChain — 7 operation(s) for bulk-exports.
LangChain charts API
The charts API from LangChain — 13 operation(s) for charts.
LangChain comments API
The comments API from LangChain — 3 operation(s) for comments.
LangChain commits API
The commits API from LangChain — 2 operation(s) for commits.
LangChain data_planes API
The data_planes API from LangChain — 1 operation(s) for data_planes.
LangChain datasets API
The datasets API from LangChain — 28 operation(s) for datasets.
LangChain evaluators API
The evaluators API from LangChain — 2 operation(s) for evaluators.
LangChain examples API
The examples API from LangChain — 9 operation(s) for examples.
LangChain experiment-view-overrides API
The experiment-view-overrides API from LangChain — 2 operation(s) for experiment-view-overrides.
LangChain experiments API
The experiments API from LangChain — 1 operation(s) for experiments.
LangChain features API
The features API from LangChain — 4 operation(s) for features.
LangChain feedback API
The feedback API from LangChain — 7 operation(s) for feedback.
LangChain feedback-configs API
The feedback-configs API from LangChain — 1 operation(s) for feedback-configs.
LangChain fleet github-app API
The fleet github-app API from LangChain — 9 operation(s) for fleet github-app.
LangChain fleet integrations API
The fleet integrations API from LangChain — 3 operation(s) for fleet integrations.
LangChain fleet mcp API
The fleet mcp API from LangChain — 4 operation(s) for fleet mcp.
LangChain fleet usage API
The fleet usage API from LangChain — 4 operation(s) for fleet usage.
LangChain fleet_webhooks API
The fleet_webhooks API from LangChain — 1 operation(s) for fleet_webhooks.
LangChain hub_environments API
The hub_environments API from LangChain — 2 operation(s) for hub_environments.
LangChain info API
The info API from LangChain — 2 operation(s) for info.
LangChain integrations API
The integrations API from LangChain — 1 operation(s) for integrations.
LangChain likes API
The likes API from LangChain — 1 operation(s) for likes.
LangChain mcp API
The mcp API from LangChain — 2 operation(s) for mcp.
LangChain mcp_vendors API
The mcp_vendors API from LangChain — 6 operation(s) for mcp_vendors.
LangChain me API
The me API from LangChain — 4 operation(s) for me.
LangChain metrics API
The metrics API from LangChain — 1 operation(s) for metrics.
LangChain model-price-map API
The model-price-map API from LangChain — 2 operation(s) for model-price-map.
LangChain nps API
The nps API from LangChain — 1 operation(s) for nps.
LangChain oauth API
The oauth API from LangChain — 7 operation(s) for oauth.
LangChain Ok API
The Ok API from LangChain — 1 operation(s) for ok.
LangChain optimization-jobs API
The optimization-jobs API from LangChain — 4 operation(s) for optimization-jobs.
LangChain Organizations API
The Organizations API from LangChain — 1 operation(s) for organizations.
LangChain orgs API
The orgs API from LangChain — 39 operation(s) for orgs.
LangChain ownerships API
The ownerships API from LangChain — 1 operation(s) for ownerships.
LangChain playground-settings API
The playground-settings API from LangChain — 2 operation(s) for playground-settings.
LangChain prompt-webhooks API
The prompt-webhooks API from LangChain — 3 operation(s) for prompt-webhooks.
LangChain prompts API
The prompts API from LangChain — 2 operation(s) for prompts.
LangChain public API
The public API from LangChain — 20 operation(s) for public.
LangChain repos API
The repos API from LangChain — 5 operation(s) for repos.
LangChain run API
The run API from LangChain — 19 operation(s) for run.
LangChain runs API
The runs API from LangChain — 7 operation(s) for runs.
LangChain sandboxes API
The sandboxes API from LangChain — 11 operation(s) for sandboxes.
LangChain sandboxes-internal API
The sandboxes-internal API from LangChain — 1 operation(s) for sandboxes-internal.
LangChain SCIM Tokens API
The SCIM Tokens API from LangChain — 2 operation(s) for scim tokens.
LangChain service-accounts API
The service-accounts API from LangChain — 2 operation(s) for service-accounts.
LangChain sessions API
The sessions API from LangChain — 1 operation(s) for sessions.
LangChain settings API
The settings API from LangChain — 2 operation(s) for settings.
LangChain tag-transitions API
The tag-transitions API from LangChain — 1 operation(s) for tag-transitions.
LangChain tags API
The tags API from LangChain — 2 operation(s) for tags.
LangChain tenant API
The tenant API from LangChain — 1 operation(s) for tenant.
LangChain threads API
The threads API from LangChain — 2 operation(s) for threads.
LangChain tools API
The tools API from LangChain — 3 operation(s) for tools.
LangChain tracer-sessions API
The tracer-sessions API from LangChain — 14 operation(s) for tracer-sessions.
LangChain TTL Settings API
The TTL Settings API from LangChain — 2 operation(s) for ttl settings.
LangChain usage-limits API
The usage-limits API from LangChain — 3 operation(s) for usage-limits.
LangChain workspaces API
The workspaces API from LangChain — 25 operation(s) for workspaces.
Scroll within the panel for all 66 ·
Open Collections 1
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
LangSmith
OPEN COLLECTIONGraphQL 1
Where a provider ships GraphQL, the schema is the contract. We profile it alongside the REST surface so the whole interface is legible in one place.
GraphQL schemas published by this provider.
LangChain GraphQL API
LangChain is a framework for building LLM applications. The LangSmith API (the hosted platform) covers trace management, feedback collection, dataset management, evaluation runs...
GRAPHQLPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Langchain Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Langchain Finops
FINOPSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for LangChain — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 3
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 1
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/langchain · machine-readable index on apis.io