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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.

agent ready

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score
travel_explore apis.io index code GitHub sourcepublic Website

API Evangelist profiles LangChain the way a machine reads it — 141 machine-readable artifacts across 1 API, 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 40.6/100 (developing), with a separate agent-readiness read of 33/100 (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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 40.6/100 · developing
Contract Quality 14.0 / 25
Developer Ergonomics 7.1 / 20
Access Clarity 7.9 / 20
Operational Transparency 3.8 / 13
Contract Governance 0.0 / 12
Discoverability 5.2 / 10
Agent readiness — 33/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract derived 2.5 / 10
Documented Reversibility documented 2.4 / 6
MCP Server 0 / 12
Machine-Readable Auth bearer 3.5 / 10
Idempotency 0 / 9
Stable Error Semantics 8.0 / 8
Request/Response Examples partial 3.5 / 7
Rate-Limit Signaling documented 3.5 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
LangChain Kin Score — API readiness rating by API Evangelist

Put this on your own site. The badge is drawn live from LangChain's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.

<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/langchain/"
   title="LangChain on API Evangelist — API profile and Kin Score">
  <img src="https://apis.io/badge/langchain.svg"
       alt="LangChain Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>

More shapes, themes and sizes → · Score as JSON · How badges work

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 68

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).

API Collection

OPEN COLLECTION

LangSmith access_policies API

OPEN COLLECTION

LangSmith access_policies ace API

OPEN COLLECTION

LangSmith access_policies alert_rules API

OPEN COLLECTION

LangSmith access_policies annotation-queues API

OPEN COLLECTION

LangSmith access_policies api-key API

OPEN COLLECTION

LangSmith access_policies audit-logs API

OPEN COLLECTION

LangSmith access_policies auth API

OPEN COLLECTION

LangSmith access_policies aws_marketplace API

OPEN COLLECTION

LangSmith access_policies backfills API

OPEN COLLECTION

LangSmith access_policies beacon API

OPEN COLLECTION

LangSmith access_policies bulk-exports API

OPEN COLLECTION

LangSmith access_policies charts API

OPEN COLLECTION

LangSmith access_policies comments API

OPEN COLLECTION

LangSmith access_policies commits API

OPEN COLLECTION

LangSmith access_policies data_planes API

OPEN COLLECTION

LangSmith access_policies datasets API

OPEN COLLECTION

LangSmith access_policies evaluators API

OPEN COLLECTION

LangSmith access_policies examples API

OPEN COLLECTION

LangSmith access_policies experiment-view-overrides API

OPEN COLLECTION

LangSmith access_policies experiments API

OPEN COLLECTION

LangSmith access_policies features API

OPEN COLLECTION

LangSmith access_policies feedback API

OPEN COLLECTION

LangSmith access_policies feedback-configs API

OPEN COLLECTION

LangSmith access_policies fleet github-app API

OPEN COLLECTION

LangSmith access_policies fleet integrations API

OPEN COLLECTION

LangSmith access_policies fleet mcp API

OPEN COLLECTION

LangSmith access_policies fleet usage API

OPEN COLLECTION

LangSmith access_policies fleet_webhooks API

OPEN COLLECTION

LangSmith access_policies hub_environments API

OPEN COLLECTION

LangSmith access_policies info API

OPEN COLLECTION

LangSmith access_policies integrations API

OPEN COLLECTION

LangSmith access_policies likes API

OPEN COLLECTION

LangSmith access_policies mcp API

OPEN COLLECTION

LangSmith access_policies mcp_vendors API

OPEN COLLECTION

LangSmith access_policies me API

OPEN COLLECTION

LangSmith access_policies metrics API

OPEN COLLECTION

LangSmith access_policies model-price-map API

OPEN COLLECTION

LangSmith access_policies nps API

OPEN COLLECTION

LangSmith access_policies oauth API

OPEN COLLECTION

LangSmith access_policies Ok API

OPEN COLLECTION

LangSmith access_policies optimization-jobs API

OPEN COLLECTION

LangSmith access_policies Organizations API

OPEN COLLECTION

LangSmith access_policies orgs API

OPEN COLLECTION

LangSmith access_policies ownerships API

OPEN COLLECTION

LangSmith access_policies playground-settings API

OPEN COLLECTION

LangSmith access_policies prompt-webhooks API

OPEN COLLECTION

LangSmith access_policies prompts API

OPEN COLLECTION

LangSmith access_policies public API

OPEN COLLECTION

LangSmith access_policies repos API

OPEN COLLECTION

LangSmith access_policies run API

OPEN COLLECTION

LangSmith access_policies runs API

OPEN COLLECTION

LangSmith access_policies sandboxes API

OPEN COLLECTION

LangSmith access_policies sandboxes-internal API

OPEN COLLECTION

LangSmith access_policies SCIM Tokens API

OPEN COLLECTION

LangSmith access_policies service-accounts API

OPEN COLLECTION

LangSmith access_policies sessions API

OPEN COLLECTION

LangSmith access_policies settings API

OPEN COLLECTION

LangSmith access_policies tag-transitions API

OPEN COLLECTION

LangSmith access_policies tags API

OPEN COLLECTION

LangSmith access_policies tenant API

OPEN COLLECTION

LangSmith access_policies threads API

OPEN COLLECTION

LangSmith access_policies tools API

OPEN COLLECTION

LangSmith access_policies tracer-sessions API

OPEN COLLECTION

LangSmith access_policies TTL Settings API

OPEN COLLECTION

LangSmith access_policies usage-limits API

OPEN COLLECTION

LangSmith access_policies workspaces API

OPEN COLLECTION

LangSmith

OPEN COLLECTION

Scroll within the panel for all 68 ·

GraphQL 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...

GRAPHQL

Pricing 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 things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.

Published pricing tiers and plan structures.

Langchain Plans Pricing

3 plans

PLANS

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

5 limits

RATE LIMITS

FinOps 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

FINOPS

Security 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.

Langchain Authentication

apiKey/http · 4 schemes

SECURITY

Langchain Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

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.

Langchain Agentic Access

506 operations · 309 acting · 8 human-in-the-loop

506 operations · 309 acting

AGENTIC

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

Documentation
Documentation
 Guide
Guide

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 AgentSkills
AgentSkills
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

ChangeLog
ChangeLog
 Support
Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 2

Properties that don't map to a standard resource type

CapabilityMap
CapabilityMap
 CaseStudies
CaseStudies

← All providers · Data indexed from github.com/api-evangelist/langchain · machine-readable index on apis.io

Where this information came from

This is an independent, third-party profile of LangChain, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

info@apievangelist.com · Read the full data-sourcing policy →
On a security or compliance team? Put security in the subject line and you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.