reddit.com

Reddit (JSON API)

by webmcp-today · v1 · updated 8/9/2026

*://*.reddit.com/*

Read and write Reddit via its own JSON API: list subreddit posts, read threads, search, comment, and vote — executed as the logged-in user. Tier-1 API execution (no DOM selectors).

What changed in v1: `returns` projections are JMESPath, `extract`/`errorPath` are locator arrays, `sendAs` is {in, name}, and the modhash source caches for 300s instead of re-fetching before every write.

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Installing saves v1 in your browser, not on your account. The extension registers its tools whenever you're on a matching page, and you stay on v1 until you update.

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Tools (6)

reddit_meread-only
Get the logged-in Reddit user's username and total karma. Proves the session works; write tools need a logged-in session.
Show input schema and execution
```
{
  "inputSchema": {
    "type": "object",
    "properties": {},
    "additionalProperties": false
  },
  "execution": {
    "mode": "api",
    "endpoint": "me"
  }
}
```

reddit_subreddit_hotread-only

List the current hot posts in a subreddit: title, author, score, comment count, permalink, and fullname (use with reddit_comment/reddit_vote).

Show input schema and execution

{
  "inputSchema": {
    "type": "object",
    "properties": {
      "limit": {
        "type": "integer",
        "description": "Max posts to return (1-25)"
      },
      "subreddit": {
        "type": "string",
        "description": "Subreddit name, without the r/ prefix"
      }
    },
    "required": [
      "subreddit",
      "limit"
    ],
    "additionalProperties": false
  },
  "execution": {
    "mode": "api",
    "endpoint": "subredditHot"
  }
}

reddit_searchread-only

Search all of Reddit for posts matching a query, ranked by relevance: title, subreddit, author, score, comment count, permalink, and fullname.

Show input schema and execution

{
  "inputSchema": {
    "type": "object",
    "properties": {
      "limit": {
        "type": "integer",
        "description": "Max posts to return (1-25)"
      },
      "query": {
        "type": "string",
        "description": "Search query"
      }
    },
    "required": [
      "query",
      "limit"
    ],
    "additionalProperties": false
  },
  "execution": {
    "mode": "api",
    "endpoint": "search"
  }
}

reddit_read_threadread-only

Read the top comments of a Reddit post: author, score, and body per comment. Take the post ID from a permalink (/comments/<id>/).

Show input schema and execution

{
  "inputSchema": {
    "type": "object",
    "properties": {
      "depth": {
        "type": "integer",
        "description": "Reply nesting depth to include (1-10)"
      },
      "limit": {
        "type": "integer",
        "description": "Max top-level comments (1-25)"
      },
      "postId": {
        "type": "string",
        "description": "Base36 post ID from the URL, e.g. 1abc2de (no t3_ prefix)"
      }
    },
    "required": [
      "postId",
      "limit",
      "depth"
    ],
    "additionalProperties": false
  },
  "execution": {
    "mode": "api",
    "endpoint": "thread"
  }
}

reddit_comment

Post a comment on a Reddit post, or reply to a comment, as the logged-in user. Use a fullname (t3_... or t1_...) from the read tools.

Show input schema and execution

{
  "inputSchema": {
    "type": "object",
    "properties": {
      "text": {
        "type": "string",
        "description": "Comment body (Reddit markdown)"
      },
      "thingId": {
        "type": "string",
        "description": "Fullname of the target: t3_... for a post, t1_... for a comment"
      }
    },
    "required": [
      "thingId",
      "text"
    ],
    "additionalProperties": false
  },
  "execution": {
    "mode": "api",
    "endpoint": "comment"
  }
}

reddit_vote

Upvote, downvote, or clear a vote on a Reddit post or comment, as the logged-in user. Use a fullname (t3_... or t1_...) from the read tools.

Show input schema and execution

{
  "inputSchema": {
    "type": "object",
    "properties": {
      "thingId": {
        "type": "string",
        "description": "Fullname of the target: t3_... for a post, t1_... for a comment"
      },
      "direction": {
        "type": "string",
        "description": "Vote direction: 1 = upvote, 0 = clear, -1 = downvote",
        "enum": [
          "1",
          "0",
          "-1"
        ]
      }
    },
    "required": [
      "thingId",
      "direction"
    ],
    "additionalProperties": false
  },
  "execution": {
    "mode": "api",
    "endpoint": "vote"
  }
}