Mastodon data API

8 endpoints for Mastodon: profile, profile posts, post, post comments, hashtag, trending, trending posts, trending links. 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/mastodon/profile	A Mastodon account by user@instance: display name, bio, profile fields, and follower, following and post counts.	1	15 min
profile/postsGET /v1/mastodon/profile/posts	A Mastodon account's latest posts, boosts included, newest first, with like, reply and boost counts.	1	10 min
postGET /v1/mastodon/post	One Mastodon post by URL, with its engagement counts.	1	10 min
post/commentsGET /v1/mastodon/post/comments	Comments on one Mastodon post, replies included.	1	5 min
hashtagGET /v1/mastodon/hashtag	Posts under a Mastodon hashtag.	1	2 min
trendingGET /v1/mastodon/trending	Hashtags trending on mastodon.social.	1	30 min
trending/postsGET /v1/mastodon/trending/posts	Posts the Mastodon server ranks as trending right now, with author, boosts and media.	1	30 min
trending/linksGET /v1/mastodon/trending/links	News links shared across Mastodon most in the last days, with publisher and share totals.	1	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"
      }
    }
  }
}