How do I connect ChatGPT to Apple Health?

Can ChatGPT read and write Apple Health data?

Checked on 7 November 2026.

OpenAI's built-in Health in ChatGPT can read Apple Health data with your permission but cannot write back to Apple Health. OpenAI's help page lists eligible users in the US and supports web and iOS; connecting Apple Health requires the ChatGPT app on an iPhone. OpenAI says access is rolling out, so an eligible account may not have it yet. OpenAI says built-in Health is not supported in Codex at this time.

Syncky Health connects Apple Health to your own agent or server, with no Syncky account. On the agent route, client health-data envelopes are encrypted end to end through Relay. Relay sees delivery metadata and no health values; its own hub notices are plaintext. It queues sealed envelopes until acknowledgment or expiry, at most 7 days. Your agent receives plaintext, and a chosen model sees what the agent supplies.

Syncky writes only to supported types in the app's device-wide write allowance, within the connection's write scope and with iOS Health permission. Each entry records its source; see write permissions and source metadata.

Which ChatGPT clients work with Syncky today?

ChatGPT desktop on Mac or Windows and Codex CLI/IDE can use the paired local agent through npx -y @syncky/agent mcp, with Node.js 22.15 or newer. The linked guides disable syncky_send and syncky_ack for read-only use; writing requires deliberate opt-in as well as the app's permissions. Follow those guides for local stdio configuration.

chatgpt.com and the ChatGPT mobile apps are not supported by Syncky's local MCP route. Those clients need a remote MCP URL and cannot reach a local agent. This limit concerns Syncky; built-in Health has the separate web and iOS availability described above.

iOS decides background opportunities. Syncky reads and applies writes when the app runs and the iPhone is unlocked; a queued write is not an applied write.

Where should I start?

Follow the ChatGPT desktop guide or Codex guide, then use agent setup for pairing, receiving and permissions. For a direct server or other approaches, see Apple Health API options, writing to Apple Health and the Apple Health MCP comparison.