LangDB website screenshot

LangDB

LangDB is an AI gateway and governance platform that routes requests across 250+ models from providers such as OpenAI, Anthropic, Google, Meta, Mistral, and DeepSeek through a single project-scoped, OpenAI-compatible REST API. It layers routing, guardrails, tracing, cost control, and an MCP (Model Context Protocol) gateway on top of that unified interface.

LangDB publishes 6 APIs on the APIs.io network, including Analytics API, Chat API, Embeddings API, and 3 more. Tagged areas include AI, LLM, AI Gateway, Routing, and Governance.

The LangDB catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

LangDB’s developer surface includes authentication, documentation, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
46.6/100 developing ▬ flat Agent 36/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemiumOpen⚡ Free to try
6 APIs
AILLMAI GatewayRoutingGovernanceMCP

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 46.6/100 · developing
Contract Quality 17.6 / 25
Developer Ergonomics 3.9 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 5.0 / 12
Discoverability 7.4 / 10
Agent readiness — 36/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/langdb: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 6

Individual APIs this provider publishes, each with its own machine-readable definition.

LangDB Analytics API

Usage analytics and cost summaries.

LangDB Chat API

OpenAI-compatible chat completions and model routing.

LangDB Embeddings API

Vector embeddings for input text.

LangDB Images API

Image generation.

LangDB Models API

Catalog of models available through the gateway.

LangDB Threads API

Conversation threads, their messages, and per-thread cost.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

LangDB AI Gateway API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Langdb Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Langdb Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Langdb Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

LangDB Chat Completions Streaming (HTTP + SSE)

AsyncAPI 2.6 description of LangDB's **chat completion streaming** surface. LangDB does not publish a WebSocket API for chat. The asynchronous / event-style transport documented...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

LangDB API Rules

5 rules · 1 errors 4 warnings

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Langdb Authentication

http · 1 scheme

SECURITY

Langdb Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Langdb Agentic Access

10 operations · 7 acting

10 operations · 7 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps

Company 2

The organization behind the API

LinkedIn
LinkedIn
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: langdb
url: https://raw.githubusercontent.com/api-evangelist/langdb/refs/heads/main/apis.yml
name: LangDB
kind: company
description: LangDB is an AI gateway and governance platform that routes requests across 250+ models from providers such as
  OpenAI, Anthropic, Google, Meta, Mistral, and DeepSeek through a single project-scoped, OpenAI-compatible REST API. It layers
  routing, guardrails, tracing, cost control, and an MCP (Model Context Protocol) gateway on top of that unified interface.
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Freemium · Open access
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/langdb.png
tags:
- AI
- LLM
- AI Gateway
- Routing
- Governance
- MCP
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.19'
apis:
- aid: langdb:langdb-analytics-api
  name: LangDB Analytics API
  description: Usage analytics and cost summaries.
  humanURL: https://docs.langdb.ai/api-reference/ai-gateway-api/
  baseURL: https://api.us-east-1.langdb.ai/{project_id}/v1
  tags:
  - Analytics
  properties:
  - type: OpenAPI
    url: openapi/langdb-analytics-api-openapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/getting-started/working-with-api/
  - type: APIReference
    url: https://docs.langdb.ai/api-reference/ai-gateway-api/
  - type: Postman
    url: collections/langdb.postman_collection.json
  - type: AsyncAPI
    url: asyncapi/langdb-asyncapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/concepts/thread
  - type: Documentation
    url: https://docs.langdb.ai/features/usage
  - type: Documentation
    url: https://docs.langdb.ai/features/mcp-support
  - type: Documentation
    url: https://docs.langdb.ai/concepts/virtual-mcp-servers/
- aid: langdb:langdb-chat-api
  name: LangDB Chat API
  description: OpenAI-compatible chat completions and model routing.
  humanURL: https://docs.langdb.ai/api-reference/ai-gateway-api/
  baseURL: https://api.us-east-1.langdb.ai/{project_id}/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/langdb-chat-api-openapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/getting-started/working-with-api/
  - type: APIReference
    url: https://docs.langdb.ai/api-reference/ai-gateway-api/
  - type: Postman
    url: collections/langdb.postman_collection.json
  - type: AsyncAPI
    url: asyncapi/langdb-asyncapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/concepts/thread
  - type: Documentation
    url: https://docs.langdb.ai/features/usage
  - type: Documentation
    url: https://docs.langdb.ai/features/mcp-support
  - type: Documentation
    url: https://docs.langdb.ai/concepts/virtual-mcp-servers/
- aid: langdb:langdb-embeddings-api
  name: LangDB Embeddings API
  description: Vector embeddings for input text.
  humanURL: https://docs.langdb.ai/api-reference/ai-gateway-api/
  baseURL: https://api.us-east-1.langdb.ai/{project_id}/v1
  tags:
  - Embeddings
  properties:
  - type: OpenAPI
    url: openapi/langdb-embeddings-api-openapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/getting-started/working-with-api/
  - type: APIReference
    url: https://docs.langdb.ai/api-reference/ai-gateway-api/
  - type: Postman
    url: collections/langdb.postman_collection.json
  - type: AsyncAPI
    url: asyncapi/langdb-asyncapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/concepts/thread
  - type: Documentation
    url: https://docs.langdb.ai/features/usage
  - type: Documentation
    url: https://docs.langdb.ai/features/mcp-support
  - type: Documentation
    url: https://docs.langdb.ai/concepts/virtual-mcp-servers/
- aid: langdb:langdb-images-api
  name: LangDB Images API
  description: Image generation.
  humanURL: https://docs.langdb.ai/api-reference/ai-gateway-api/
  baseURL: https://api.us-east-1.langdb.ai/{project_id}/v1
  tags:
  - Images
  properties:
  - type: OpenAPI
    url: openapi/langdb-images-api-openapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/getting-started/working-with-api/
  - type: APIReference
    url: https://docs.langdb.ai/api-reference/ai-gateway-api/
  - type: Postman
    url: collections/langdb.postman_collection.json
  - type: AsyncAPI
    url: asyncapi/langdb-asyncapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/concepts/thread
  - type: Documentation
    url: https://docs.langdb.ai/features/usage
  - type: Documentation
    url: https://docs.langdb.ai/features/mcp-support
  - type: Documentation
    url: https://docs.langdb.ai/concepts/virtual-mcp-servers/
- aid: langdb:langdb-models-api
  name: LangDB Models API
  description: Catalog of models available through the gateway.
  humanURL: https://docs.langdb.ai/api-reference/ai-gateway-api/
  baseURL: https://api.us-east-1.langdb.ai/{project_id}/v1
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/langdb-models-api-openapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/getting-started/working-with-api/
  - type: APIReference
    url: https://docs.langdb.ai/api-reference/ai-gateway-api/
  - type: Postman
    url: collections/langdb.postman_collection.json
  - type: AsyncAPI
    url: asyncapi/langdb-asyncapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/concepts/thread
  - type: Documentation
    url: https://docs.langdb.ai/features/usage
  - type: Documentation
    url: https://docs.langdb.ai/features/mcp-support
  - type: Documentation
    url: https://docs.langdb.ai/concepts/virtual-mcp-servers/
- aid: langdb:langdb-threads-api
  name: LangDB Threads API
  description: Conversation threads, their messages, and per-thread cost.
  humanURL: https://docs.langdb.ai/api-reference/ai-gateway-api/
  baseURL: https://api.us-east-1.langdb.ai/{project_id}/v1
  tags:
  - Threads
  properties:
  - type: OpenAPI
    url: openapi/langdb-threads-api-openapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/getting-started/working-with-api/
  - type: APIReference
    url: https://docs.langdb.ai/api-reference/ai-gateway-api/
  - type: Postman
    url: collections/langdb.postman_collection.json
  - type: AsyncAPI
    url: asyncapi/langdb-asyncapi.yml
  - type: Documentation
    url: https://docs.langdb.ai/concepts/thread
  - type: Documentation
    url: https://docs.langdb.ai/features/usage
  - type: Documentation
    url: https://docs.langdb.ai/features/mcp-support
  - type: Documentation
    url: https://docs.langdb.ai/concepts/virtual-mcp-servers/
common:
- type: AgenticAccess
  url: agentic-access/langdb-agentic-access.yml
- type: DomainSecurity
  url: security/langdb-domain-security.yml
- type: Authentication
  url: authentication/langdb-authentication.yml
- type: GitHubOrganization
  url: https://github.com/langdb
- type: LinkedIn
  url: https://www.linkedin.com/company/langdb
- type: Website
  url: https://langdb.ai
- type: Documentation
  url: https://docs.langdb.ai
- type: Plans
  url: plans/langdb-plans-pricing.yml
- type: RateLimits
  url: rate-limits/langdb-rate-limits.yml
- type: FinOps
  url: finops/langdb-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com