# 一心漫遊 ONE HEART eSIM (oneheartesim.com)

Sells prepaid eSIM data plans for travel in Asia and Europe, installed by QR code or the app.

- Atlas card: https://inite.ai/en/atlas/oneheartesim.com
- Site: https://oneheartesim.com
- For: Travelers who need mobile data abroad in Asia or Europe and want an eSIM instead of a physical SIM.
- Categories: lifestyle
- Use 0/100 · alive 100/100

## Used for

- install a travel data eSIM by scanning a QR code
- keep a backup eSIM ready for emergencies while abroad
- manage eSIM plans from a phone app

## Price

- no price printed (read 2026-10-24 on https://oneheartesim.com/Store)

## For developers

- MCP server: com.oneheartesim.mcp/esim (namespace; open on 2026-10-24, 5 tools)
- Read 2026-10-24

## MCP server, measured daily

Server: https://mcp.oneheartesim.com/, checked every day since 2026-10-25 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 3670 ms
- Sign-in: none
- Context its tool definitions take: about 808 tokens (5 tools)
- Tool definitions: B, 83/100
- Failing "annotations": 5 of 5 tools
- Warning "open_writes": create_esim_order
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-24

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Source: INITE Atlas, https://inite.ai/en/atlas/oneheartesim.com. JSON: https://inite.ai/api/atlas/oneheartesim.com. MCP: https://inite.ai/api/mcp (atlas_lookup).