bosch-flow-mcp

MCP server for Bosch eBike Flow (Smart System / BES3). Tracks battery health, charge cycles, component versions, service history, live state-of-charge, and per-ride activity data (distance, elevation, power, assist-mode, CO2).

Disclaimer

This is an unofficial, community-built project. It is not affiliated with, authorised by, or endorsed by Robert Bosch GmbH, Bosch eBike Systems, or SingleKey ID. "Bosch", "eBike Flow", and related marks belong to their owners and are used here only to describe interoperability.

• It signs in with your own Bosch eBike Flow account (via the standard SingleKey ID login) and reads only your own data. It is read-only - it never modifies your bike, battery, or account.
• It uses the same public OAuth client (one-bike-app, PKCE) that the official Bosch eBike Flow app uses. No credentials, secrets, or protection measures are extracted, bypassed, or circumvented - every identifier here is already publicly documented.
• When you supply your own EU Data Act API credentials, the official Data Act API is used. Otherwise the same app API your phone already uses is queried with your own login.
• This is an undocumented, unofficial interface that may change or stop working at any time if Bosch alters their systems.
• You are responsible for ensuring your use complies with Bosch's and SingleKey ID's terms of service in your jurisdiction.
• Provided with no warranty under GPLv3+ (see LICENSE). Use at your own risk.

Features

• Battery state snapshots over time (charge cycles, energy delivered, degradation trends)
• Components and firmware versions (drive unit, battery, ConnectModule, head unit, remote, ABS)
• Service book history and software update log (EU Data Act client only)
• Live state-of-charge from ConnectModule via mobile API
• Battery capacity tester results (EU Data Act client only)
• Per-ride activities: distance, elevation, speed, cadence, measured rider power, calories, rider-vs-motor energy share, assist-mode split, CO2, ABS events, plus a per-point GPS/speed/elevation/power track
• Auto-sync on demand - tools fetch fresh data without a cron job

Requirements

• Python 3.13+ (tested on 3.13 and 3.14, on Linux, macOS and Windows, in CI)
• uv (recommended) or pip
• A Bosch eBike Flow account (free, register at the Bosch eBike Flow app)
• A BES3 Smart System eBike registered in the app

Install

pip install bosch-flow-mcp

Or run it without installing with uvx bosch-flow-mcp. For development from a clone:

git clone https://github.com/partymola/bosch-flow-mcp
cd bosch-flow-mcp
uv venv --python 3.13 .venv
uv pip install -e .

Auth

.venv/bin/bosch-flow-mcp auth

Opens your browser to Bosch login. The auth flow uses the one-bike-app public client with PKCE - no API keys or registration needed. Just your Bosch Flow account.

Important: Open browser DevTools (F12) and switch to the Network tab before logging in. After login, the browser redirects to an iOS URI (onebikeapp-ios://) that desktop browsers can't open. Copy the full redirect URL from DevTools (right-click > Copy URL on the oauth2redirect entry) and paste it at the prompt.

Tokens are saved to config/bosch_tokens.json and auto-refresh via offline_access.

EU Data Act users: if you have registered your own euda client and placed its ID in config/bosch_config.json, auth uses that instead - it opens the browser and completes automatically through a local http://localhost:4200 callback, with no DevTools step.

Sync

.venv/bin/bosch-flow-mcp sync                     # all data types
.venv/bin/bosch-flow-mcp sync --types bikes,batteries

Data types: bikes, batteries, components, service, software_updates, capacity.

Fetches your data and stores it locally. The source depends on your sign-in:

• A standard Bosch eBike Flow account (the default) reads bikes, batteries, components, current firmware, and live state-of-charge from the mobile app API - works for any account, including non-EU.
• Service-book history, software-update history, and capacity-tester results come only from the EU Data Act API, which requires registering your own euda client at the Bosch Data Act portal. With a standard sign-in those types report unavailable (with a note) rather than a silent empty result, and the Data Act API returns nothing for accounts registered outside the EU.

You can also use the bosch_sync MCP tool, or rely on automatic sync (each get_* tool triggers a sync if data is stale).

Run bosch-flow-mcp --version to print the installed package version.

Register with Claude Code

claude mcp add -s user bosch-flow -- /full/path/to/bosch-flow-mcp/.venv/bin/bosch-flow-mcp

Then ask Claude questions like:

• "What's my bike's battery health this year?"
• "Show me charge cycle trends by month"
• "What firmware version is my drive unit on?"
• "Have there been any service records for my bike?"
• "How far and how hard were my rides this week?"

Available tools

API credits

This server uses the Bosch Mobile API (obc-rider-profile.prod.connected-biking.cloud) as the primary data source, the rider-activity API (obc-rider-activity.prod.connected-biking.cloud) for per-ride data, and optional Data Act API (api.bosch-ebike.com) support for additional endpoints.

Authentication uses the one-bike-app public client (the same OAuth client as the Bosch eBike Flow mobile app). The auth approach was documented by the marq24/ha-bosch-ebike-flow Home Assistant integration and the open-ebike/open-ebike-backend project.

Configuration

Data safety

• OAuth tokens are created at 0600 on POSIX - Windows ignores the mode and governs access by inherited ACLs; the token files and bosch_flow.db are gitignored.

• A pre-commit hook (scripts/check-no-data.sh) blocks committing database files, files under config/, and large files. It does not read file contents. Install it after cloning:

  bash

  ln -sf ../../scripts/check-no-data.sh .git/hooks/pre-commit
  

• Tests use temporary SQLite databases and fictional identifiers - no real bike or account data ever enters the repo.

Contributing

See CONTRIBUTING.md for development setup, the test workflow, and the pre-commit hook. Changes are tracked in CHANGELOG.md.

License

GPLv3+. See LICENSE.