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Compare scores, permissions, risks, and fit in one decision-focused table.

DimensionTwelve Data MCP ServerConnect AI assistants to Twelve Data financial market dataHevy MCPManage your Hevy workout data from AI assistants via MCP.
FMRS52 / 100 · D77 / 100 · B
Reliability8 / 2012 / 20
Security and permissions13 / 2016 / 20
Maintenance7 / 2016 / 20
Documentation11 / 2018 / 20
Setup experience13 / 2015 / 20
Best for
  • Individuals or teams with a Twelve Data account who want market data inside their AI assistant
  • Users who want a no-install setup via the hosted cloud connector
  • Developers who prefer to self-host with their own API key
  • 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
Not for
  • Users without a Twelve Data account who don't want to sign up or authorize access
  • Fully offline scenarios with no third-party data dependency
  • General tasks unrelated to financial market data
  • 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)
Required permissions
  • Cloud option: browser-based OAuth login linking your account to the Twelve Data hosted service
  • Local option: reads TWELVE_DATA_API_KEY from a .env file and uses it to call the Twelve Data API
  • Makes outbound network requests to fetch market data (to mcp.twelvedata.com for the cloud option, or directly to the Twelve Data API locally)
  • 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
Risks and side effects
  • The cloud server is hosted by Twelve Data, requiring account authorization to a third-party service
  • In local mode, the API key is stored in plaintext in the .env file and must be kept secure
  • Data access and rate limits are bound by your Twelve Data subscription plan
  • The repository does not specify an open-source license, leaving usage and redistribution terms unclear
  • 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
Supported clientsClaude Desktop, ChatGPTClaude Desktop, Cursor, Codex, Antigravity
Tools026