Open WebUI website screenshot

Open WebUI

Open WebUI is a self-hosted, open-source web UI for LLMs (notably Ollama and OpenAI-compatible backends). It exposes a REST API for chats, models, prompts, knowledge (RAG), users, and tools. Distributed under a modified BSD-3-Clause license; primarily run via Docker or pip on your own infrastructure.

Open WebUI publishes 3 APIs on the APIs.io network: Anthropic API, Chat API, and Ollama API. Tagged areas include LLM, Open Source, Self-Hosted, Ollama, and Chat UI.

Open WebUI’s developer surface includes authentication, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
32.1/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessSelf serve
4 APIs
LLMOpen SourceSelf-HostedOllamaChat UIRAG

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 32.1/100 · thin
Contract Quality 12.8 / 25
Developer Ergonomics 4.3 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 6.5 / 10
Agent readiness — 31/100 · agent aware
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 0 / 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/open-webui: 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 4

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

Open WebUI API

REST API exposed by a self-hosted Open WebUI instance. Endpoints cover chat completions (proxying upstream backends like Ollama or OpenAI-compatible servers), models, prompts, k...

Open WebUI Anthropic API

The Anthropic API from Open WebUI — 1 operation(s) for anthropic.

Open WebUI Chat API

The Chat API from Open WebUI — 1 operation(s) for chat.

Open WebUI Ollama API

The Ollama API from Open WebUI — 3 operation(s) for ollama.

Open Collections 1

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

Open WebUI API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Open Webui Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Open Webui Rate Limits

2 limits

RATE LIMITS

FinOps 1

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

Open Webui Finops

FINOPS

Security Posture 2

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

Open Webui Authentication

http · 1 scheme

SECURITY

Open Webui Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Open Webui Agentic Access

5 operations · 4 acting

5 operations · 4 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

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 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

OpenSource
OpenSource

Source (apis.yml)

apis.yml Raw ↑ 
aid: open-webui
url: https://raw.githubusercontent.com/api-evangelist/open-webui/refs/heads/main/apis.yml
name: Open WebUI
kind: company
description: Open WebUI is a self-hosted, open-source web UI for LLMs (notably Ollama and OpenAI-compatible backends). It
  exposes a REST API for chats, models, prompts, knowledge (RAG), users, and tools. Distributed under a modified BSD-3-Clause
  license; primarily run via Docker or pip on your own infrastructure.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/open-webui.png
tags:
- LLM
- Open Source
- Self-Hosted
- Ollama
- Chat UI
- RAG
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- aid: open-webui:platform
  name: Open WebUI API
  description: REST API exposed by a self-hosted Open WebUI instance. Endpoints cover chat completions (proxying upstream
    backends like Ollama or OpenAI-compatible servers), models, prompts, knowledge bases, files, RAG, users, auth, and tools.
    Authentication uses the Open WebUI session token or per-user API keys. The base URL is wherever you deploy Open WebUI
    (commonly http://localhost:3000/api/v1).
  humanURL: https://docs.openwebui.com/getting-started/api-endpoints
  baseURL: http://localhost:3000/api/v1
  tags:
  - Chat
  - Models
  - Prompts
  - RAG
  - Knowledge
  - Tools
  properties:
  - type: Documentation
    url: https://docs.openwebui.com/
  - type: GitHub
    url: https://github.com/open-webui/open-webui
  - type: Reference
    url: https://docs.openwebui.com/getting-started/api-endpoints
- aid: open-webui:open-webui-anthropic-api
  name: Open WebUI Anthropic API
  description: The Anthropic API from Open WebUI — 1 operation(s) for anthropic.
  humanURL: https://docs.openwebui.com/getting-started/api-endpoints
  baseURL: http://localhost:3000/api/v1
  tags:
  - Anthropic
  properties:
  - type: OpenAPI
    url: openapi/open-webui-anthropic-api-openapi.yml
- aid: open-webui:open-webui-chat-api
  name: Open WebUI Chat API
  description: The Chat API from Open WebUI — 1 operation(s) for chat.
  humanURL: https://docs.openwebui.com/getting-started/api-endpoints
  baseURL: http://localhost:3000/api/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/open-webui-chat-api-openapi.yml
- aid: open-webui:open-webui-ollama-api
  name: Open WebUI Ollama API
  description: The Ollama API from Open WebUI — 3 operation(s) for ollama.
  humanURL: https://docs.openwebui.com/getting-started/api-endpoints
  baseURL: http://localhost:3000/api/v1
  tags:
  - Ollama
  properties:
  - type: OpenAPI
    url: openapi/open-webui-ollama-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/open-webui-agentic-access.yml
- type: DomainSecurity
  url: security/open-webui-domain-security.yml
- type: Authentication
  url: authentication/open-webui-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/open-webui
- type: Website
  url: https://openwebui.com/
- type: DeveloperPortal
  url: https://docs.openwebui.com/
- type: OpenSource
  url: https://github.com/open-webui/open-webui
- type: Plans
  url: plans/open-webui-plans-pricing.yml
- type: RateLimits
  url: rate-limits/open-webui-rate-limits.yml
- type: FinOps
  url: finops/open-webui-finops.yml
- url: https://openwebui.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com