Whimsical API
Whimsical's REST API is an invitation-only beta: OAuth 2.1, read-only, five endpoints covering users, teams, comments, and file lists. Approval runs through the support team and acceptance is not guaranteed. There are no webhooks, no SDKs, and rate limits are undocumented.
Frequently asked questions
Whimsical scores A on the API Report Card. Whimsical's REST API is an invitation-only beta: OAuth 2.1, read-only, five endpoints covering users, teams, comments, and file lists. Approval runs through the support team and acceptance is not guaranteed. There are no webhooks, no SDKs, and rate limits are undocumented.
Whimsical has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Whimsical is a cloud-based visual collaboration platform that bundles flowcharts, wireframes, mind maps, sticky-note boards, sequence diagrams and lightweight docs onto a single shared 'whiteboard' canvas, with a strong recent push into AI-generated diagrams and mind maps and an explicit 2025/2026 repositioning as 'a purpose-built whiteboard for technical teams and agents.' The company was founded in 2017 by Kaspars Dancis (CEO) and Steve Schoeffel and is headquartered in Denver, Colorado.
Vertical: misc / horizontal SaaS, visual collaboration and diagramming. Not aligned to any single Supergood vertical (not Legal, Healthcare, Real Estate, Compliance, or Financial Services). Product/engineering flowcharts for system design, user flows and state machines. Wireframes for early-stage product exploration and design reviews. Mind maps for ideation, OKR breakdowns and project decomposition.
Mid-tier.
Files (flowcharts, wireframes, mind maps, sticky-note boards, sequence diagrams, docs) with their canvas geometry, shapes, connectors, text, and embedded media. Folders, sections and teams that organize files within a workspace.
Founded 2017; first major external funding 2021.
API is in limited beta and gated behind manual support approval; not generally available. Read-only, no write/mutate endpoints, so the API cannot be used to programmatically create or edit boards, comments, files or teams. Full sourced list under Sources below.
Common alternatives include Miro, FigJam (Figma), Lucidchart / Lucid Visual Collaboration Suite, Microsoft Visio, Mural, draw.io / diagrams.net. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.