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
25.8/100 emerging ▬ flat Agent 20/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0
AccessSelf serve
4 APIs
LLMOpen-SourceSelf-HostedOllamaChat UIRAG

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0
Composite quality — 25.8/100 · emerging
Contract Quality 11.2 / 25
Developer Ergonomics 4.8 / 20
Access Clarity 2.6 / 20
Operational Transparency 0.7 / 13
Contract Governance 0.0 / 12
Discoverability 6.5 / 10
Agent readiness — 20/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
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
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Surface 0 / 5
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 5

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

API Collection

OPEN COLLECTION

Open WebUI Anthropic API

OPEN COLLECTION

Open WebUI Anthropic Chat API

OPEN COLLECTION

Open WebUI Anthropic Ollama API

OPEN COLLECTION

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
tags_raw:
- LLM
- Open Source
- Self-Hosted
- Ollama
- Chat UI
- RAG
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.23'
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

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