| FMRS | 52 / 100 · D | 77 / 100 · B | 75 / 100 · B |
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| Reliability | 8 / 20 | 12 / 20 | 13 / 20 |
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| Security and permissions | 8 / 20 | 16 / 20 | 12 / 20 |
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| Maintenance | 11 / 20 | 16 / 20 | 16 / 20 |
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| Documentation | 13 / 20 | 18 / 20 | 17 / 20 |
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| Setup experience | 12 / 20 | 15 / 20 | 17 / 20 |
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| Best for | - Athletes who use Intervals.icu for training data.
- Users who want to query and manage Intervals.icu data through Claude Desktop or ChatGPT.
- Development or analysis workflows involving activity, wellness, event, and power data.
| - Hevy PRO users who want AI assistants to directly access their workout data
- People who prefer using MCP clients like Claude, Cursor, Codex for fitness tracking
- Anyone needing summaries and insights from their training data
| - Scenarios needing clean, structured web context fed to an AI assistant
- Users already on the Firecrawl platform who want to call its scraping capability directly via MCP
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| Not for | - Users who do not use Intervals.icu.
- Users unwilling to provide an Intervals.icu API key and athlete ID.
- Read-only scenarios where event or custom-item write and delete operations are not wanted.
| - Users without a Hevy PRO subscription (API key required)
- Users who want to use the server without an API key
- Those needing delete workflows (Hevy API does not expose delete endpoints)
| - Simple static-page scraping where you don't want to depend on a third-party API and incur call costs
- Sites that explicitly disallow automated access (robots.txt)
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| Required permissions | - Requires an Intervals.icu API key and athlete ID.
- Configuration includes INTERVALS_API_BASE_URL, ATHLETE_ID, API_KEY, and LOG_LEVEL.
- Permissions cover reading activities, wellness data, events, and custom items; events and custom items also support creation, updates, and deletion.
| - Requires HEVY_API_KEY environment variable for Hevy API authentication
- Can create, update, and replace workouts, routines, folders, templates, and body measurements via tools
- Read operations can fetch workouts, routines, folders, templates, history, and user info
| - Requires a Firecrawl API key to call; cost and quota are governed by the Firecrawl account
- firecrawl_agent/firecrawl_interact perform automated browser interaction, which may trigger login or form-submission flows on the target site
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| Risks and side effects | - The API key is sensitive and should not be exposed or committed to a repository.
- The server includes event and custom-item deletion tools, so misuse can cause data loss.
- ChatGPT SSE setup requires a public server URL or port forwarding; an unprotected public endpoint may broaden access.
- Write operations can modify workouts, races, notes, and custom items in Intervals.icu.
| - API key can be misused if leaked; do not expose in URLs, logs, or screenshots
- Create operations may produce duplicates on retry; update operations replace existing records
- The server sends data to the Hevy API and may send telemetry to external services unless disabled
| - Bulk crawl/map tools can generate significant request volume against a target site — respect the site's rate limits and terms of service
- firecrawl_agent's interactive action chain is longer — define task boundaries clearly before running it to avoid accidentally triggering actions on a sensitive site
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| Supported clients | Claude Desktop, ChatGPT | Claude Desktop, Cursor, Codex, Google Antigravity | Claude Desktop, VS Code, Cursor, Windsurf, Zed, Amp |
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| Tools | 16 | 26 | 11 |
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