Lemmy data API

10 endpoints for Lemmy: profile, profile posts, post, post comments, search, trending, community, community posts, community comments, communities. One API key, one JSON schema, as MCP tools or REST.

Endpoints

Call any of them over MCP with call_endpoint and its path, or over REST.

Endpoint	Returns	Credits	Cache
profileGET /v1/lemmy/profile	A Lemmy user by name@instance: display name, bio, join date, post and comment counts, and their scores.	1	15 min
profile/postsGET /v1/lemmy/profile/posts	A Lemmy user's newest posts, with the community, score, comment count and any linked page.	1	10 min
postGET /v1/lemmy/post	One Lemmy post by URL, with its engagement counts.	1	10 min
post/commentsGET /v1/lemmy/post/comments	Comments on one Lemmy post, replies included.	1	5 min
searchGET /v1/lemmy/search	Posts, comments, communities and users on lemmy.ml matching a keyword.	1	2 min
trendingGET /v1/lemmy/trending	Top posts of the day on lemmy.ml.	1	30 min
communityGET /v1/lemmy/community	One Lemmy community: description, icon, subscriber count and the day, week and month active user counts.	1	15 min
community/postsGET /v1/lemmy/community/posts	Posts one Lemmy community ranked for the chosen window, with score and vote split.	5	30 min
community/commentsGET /v1/lemmy/community/comments	Comments posted in one Lemmy community, newest or highest scoring first.	5	30 min
communitiesGET /v1/lemmy/communities	Top Lemmy communities across the federation, ranked by all-time activity.	5	30 min

Connect your agent over MCP

Remote MCP server: https://data.openkrill.app/mcp with your key in the x-api-key header.

Claude Code · Run in a terminal

claude mcp add --transport http krilldata \
  https://data.openkrill.app/mcp \
  --header "x-api-key: YOUR_API_KEY"

Cursor · Add to ~/.cursor/mcp.json

{
  "mcpServers": {
    "krilldata": {
      "url": "https://data.openkrill.app/mcp",
      "headers": {
        "x-api-key": "YOUR_API_KEY"
      }
    }
  }
}

Claude Desktop · Add to claude_desktop_config.json

{
  "mcpServers": {
    "krilldata": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://data.openkrill.app/mcp",
        "--header",
        "x-api-key:${API_KEY}"
      ],
      "env": {
        "API_KEY": "YOUR_API_KEY"
      }
    }
  }
}