Attio introduces Developer Platform with App SDK and App Store publishing

On November 6, 2025, Attio introduced its Developer Platform in a changelog entry, describing it as a way to build apps, ship integrations and automate work inside the CRM. According to the entry, developers can sync and automate data at scale through REST APIs or use a new App SDK to extend Attio with React and server-side functions. Low-code users can connect Attio with Zapier, n8n, Gumloop and Pipedream. Builders can publish apps to the Attio App Store, which the company says reaches hundreds of thousands of Attio users. Attio names Slack, Linear, Granola and Pylon among teams building on the platform.

The details

• REST APIs for syncing and automating data at scale.
• A new App SDK that extends Attio with React and server-side functions.
• Low-code connections named: Zapier, n8n, Gumloop and Pipedream.
• Apps can be published to the Attio App Store for installation by Attio users.
• Builders named: Slack, Linear, Granola, Pylon and what Attio calls hundreds more.

Context

This is the earliest Attio story in our coverage. Six days later, on November 12, 2025, Attio opened the App Store as part of the Attio Ecosystem, which is where Developer Platform apps are listed. Attio later released an MCP server for AI clients on February 19, 2026, adding another route for outside tools to work with Attio data alongside the REST APIs and App SDK.

Not disclosed

• API rate limits or pricing
• Plan requirements for using the App SDK
• Review process for publishing to the App Store
• Revenue sharing terms for paid apps