Notion API
Notion's public REST API is mature and versioned via the Notion-Version header, covering pages, databases, blocks, users, search, and native HMAC-signed webhooks. Access is self-serve with internal tokens or OAuth 2.0 for multi-workspace apps. Rate limits average 3 requests per second.
Frequently asked questions
Notion scores A on the API Report Card. Notion's public REST API is mature and versioned via the Notion-Version header, covering pages, databases, blocks, users, search, and native HMAC-signed webhooks. Access is self-serve with internal tokens or OAuth 2.0 for multi-workspace apps. Rate limits average 3 requests per second.
Notion has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Notion is an AI-first 'connected workspace' from Notion Labs, Inc. (San Francisco), founded in 2013 by Ivan Zhao and Simon Last and broadly released in its current incarnation in 2018.
Vertical: misc (horizontal docs + databases + wiki + lightweight PM + AI workspace; cuts across every Supergood vertical with no specific industry tilt). Sub-vertical: All-in-one Workspace / Docs / Wikis / Knowledge Management. Block-based pages combining rich text, headings, toggles, callouts, embeds, code, images, and database views in any structure.
High, 8/10. Notion is one of the most recognized productivity brands of the last decade, with 100M+ users globally, deep penetration in startups (>50% of YC) and tech (Fortune 100 ~62%), a massive creator/template ecosystem, and a fast-growing enterprise footprint.
Owner: Notion Labs, Inc. (privately held); HQ San Francisco, CA. Founders: Ivan Zhao (CEO), Simon Last (CTO). Founded: 2013; modern product relaunched 2018; current platform Notion 3.5 (May 2026).
Founded 2013 in San Francisco by Ivan Zhao and Simon Last; the modern product launched in 2018 after a near-complete rewrite. Now on Notion 3.5 (May 13, 2026 Developer Platform release).
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.