RunDida MCP is an MCP server provided by RunDida (跑滴答), giving AI agents capabilities in the running domain. Through it, Claude, Cursor, or any MCP client can calculate pace, heart rate zones, race predictions, and marathon countdowns in real time, and query RunDida's complete resource library.
Main capabilities and uses This MCP server includes ten tools, divided into two categories:
- Calculation tools: run locally, zero latency, no API calls required. Used to calculate running pace, Karvonen method heart rate training zones, race performance predictions based on the Riegel formula, and more.
- Data tools: fetch data from the RunDida API, with a 30-minute cache. Can query 99 running calculators, 56 training guides, and information on more than 300 marathon races (course, weather, and registration data), supporting English, Chinese, and Japanese.
Available tools The official documentation does not list the specific names and parameters of the ten tools one by one; it only states that they cover the calculation and data query capabilities described above.
How to use Install and run: npx @rundida/mcp-server Integrate with Claude Desktop: add the configuration to claude_desktop_config.json. Integrate with Cursor / Windsurf: add it to the corresponding MCP configuration. No API key required, free and zero-configuration.
Example questions you can ask the AI assistant
- "If I want to finish in 3:30, what is my marathon pace?"
- "Based on my 10K time of 45 minutes, predict my marathon time"
- "What are my heart rate zones? I am 32 years old with a resting heart rate of 52"
- "How many days until the Tokyo Marathon?"
- "Show all nutrition-related running calculators"
- "What training guides do you have about marathon training?"
- "Introduce the couch to 5K guide"
Use cases Suitable for running enthusiasts, marathon participants, and coaches, using the AI assistant to quickly obtain pace, heart rate zones, performance predictions, and race information, and to retrieve running calculators and training guides.
Limitations and notes
- Using data tools requires an internet connection to fetch data from rundida.com.
- Calculation tools run locally and do not depend on the network.
- Official materials do not provide information such as fees or pricing; they describe it as free and requiring no account.
- Official materials do not explain the tentool names and parameters one by one.
RunDida (跑滴答) is a free running tool platform for runners of all levels, offering more than 90 interactive calculators (pace, heart rate zones, VO2max, race predictions, nutrition, gear sizing, weather effects, etc.), 29 marathon countdowns (including race-day weather forecasts, course overviews, and training tools), a free JSON API (no authentication required, CORS enabled, OpenAPI 3.0 documentation), multilingual support (English, Chinese), and embeddable Widgets (embed any calculator with a one-line iframe). All tools are free, no account required, and available at rundida.com.
