# LangChain **Canonical:** https://apis.io/providers/langchain/ **Website:** https://www.langchain.com/ **APIs profiled:** 66 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. ## Kin Score — 37.9 / 100 (thin) Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 37.9). | Facet | Score | |---|---| | Discoverability | 75.9 | | Contract Quality | 56.8 | | Governance | 0.0 | | Contract Governance | 0.0 | | Operational Transparency | 28.9 | | Developer Ergonomics | 35.7 | | Commercial Clarity | 26.3 | | Access Clarity | 26.3 | ## Agent readiness — 43.2 (agent-ready) | Dimension | Value | |---|---| | Spec Presence | yes | | Agentic Access | derived | | Reversibility Documented | no | | MCP Server | no | | Auth Clarity | yes | | Idempotency | no | | Error Semantics | verified | | OpenAPI Examples | partial | | Rate Limit Signal | documented | | Event Surface Described | no | | Agent Skills | yes | | Well Known Catalog | no | | Consent Identity | no | | Agent Card | no | | Dry Run Mode | no | ## Access Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high). ## APIs (66) - **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. - …and 26 more, listed in full on the page. ## Agentic access (1) - **Langchain Agentic Access** — 506 operations · 309 acting · 8 human-in-the-loop ## Security (2) - **Langchain Authentication** — apiKey/http · 4 schemes - **Langchain Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC ## Plans (1) - **Langchain Plans Pricing** ## Tags Agents, Artificial Intelligence, Large Language Models, LLM Observability, Tracing, Evaluation --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/langchain/). Scores are computed from the provider's own public artifacts under a published rubric.