Windmill
Windmill is an open-source developer platform that turns scripts (Python, TypeScript, Go, Bash, SQL, and more) into internal tools, UIs, workflows, and cron jobs. It runs as Windmill Cloud (app.windmill.dev) or self-hosted, with a distributed worker fleet executing jobs. Everything in a workspace - scripts, flows, apps, schedules, variables, resources, triggers - is addressable over a single REST API (base https://app.windmill.dev/api on Cloud, or /api self-hosted), authenticated with a Bearer token, and is the same surface the Windmill CLI and web UI use.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles Windmill the way a machine reads it — 22 machine-readable artifacts across 15 APIs, 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 — Windmill scores 41.0/100 (thin), with a separate agent-readiness read of 48/100 (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.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile Windmill
Each block below is one kind of artifact we hold for Windmill. 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 15
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.
Windmill Apps API
Low-code UIs backed by scripts and flows.
Windmill Audit API
Audit log entries (Enterprise Edition).
Windmill Flows API
DAG workflows composing scripts with branches, loops, and approvals.
Windmill Folders API
Ownership and permission boundaries for workspace assets.
Windmill Groups API
User groups for role-based access control.
Windmill Jobs API
Execution of scripts and flows - run, inspect, and cancel jobs.
Windmill OIDC API
Short-lived OIDC token issuance (Enterprise Edition).
Windmill Resources API
Typed connection objects and resource types.
Windmill Schedules API
Cron schedules attached to runnables.
Windmill Scripts API
Code runnables in Python, TypeScript, Go, Bash, SQL, and more.
Windmill Triggers API
Event triggers - HTTP, WebSocket, Kafka, NATS, Postgres, SQS, MQTT.
Windmill Users API
Users, authentication, tokens, and service accounts.
Windmill Variables API
Encrypted, path-scoped variables and secrets.
Windmill Workers API
The distributed worker fleet executing jobs.
Windmill Workspaces API
Isolated tenants and their settings.
Scroll within the panel for all 15 ·
Open Collections 1
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).
Windmill API
OPEN COLLECTIONPricing 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 six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
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.
Windmill Dev Rate Limits
RATE LIMITSFinOps 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.
Windmill Dev Finops
FINOPSSecurity 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.
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.
Resources
Every other property we hold for Windmill — 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 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/windmill-dev · machine-readable index on apis.io