Polymarket provides a Typescript client for interacting with this streaming service. Download and view it’s documentation here

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Overview

The comments subscription provides real-time updates for comment-related events on the Polymarket platform. This includes new comments being created, as well as other comment interactions like reactions and replies.

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Subscription Details

  • Topic: comments
  • Type: comment_created (and potentially other comment event types like reaction_created)
  • Authentication: May require Gamma authentication for user-specific data
  • Filters: Optional (can filter by specific comment IDs, users, or events)

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Subscription Message

{
  "action": "subscribe",
  "subscriptions": [
    {
      "topic": "comments", 
      "type": "comment_created"
    }
  ]
}

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Message Format

When subscribed to comments, you’ll receive messages with the following structure: 
{
  "topic": "comments",
  "type": "comment_created",
  "timestamp": 1753454975808,
  "payload": {
    "body": "do you know what the term encircle means? it means to surround from all sides, Russia has present on only 1 side, that's the opposite of an encirclement",
    "createdAt": "2025-07-25T14:49:35.801298Z",
    "id": "1763355",
    "parentCommentID": "1763325",
    "parentEntityID": 18396,
    "parentEntityType": "Event",
    "profile": {
      "baseAddress": "0xce533188d53a16ed580fd5121dedf166d3482677",
      "displayUsernamePublic": true,
      "name": "salted.caramel",
      "proxyWallet": "0x4ca749dcfa93c87e5ee23e2d21ff4422c7a4c1ee",
      "pseudonym": "Adored-Disparity"
    },
    "reactionCount": 0,
    "replyAddress": "0x0bda5d16f76cd1d3485bcc7a44bc6fa7db004cdd",
    "reportCount": 0,
    "userAddress": "0xce533188d53a16ed580fd5121dedf166d3482677"
  }
}

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Message Types

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comment_created

Triggered when a user creates a new comment on an event or in reply to another comment.

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comment_removed

Triggered when a comment is removed or deleted.

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reaction_created

Triggered when a user adds a reaction to an existing comment.

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reaction_removed

Triggered when a reaction is removed from a comment.

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Payload Fields

FieldTypeDescription
bodystringThe text content of the comment
createdAtstringISO 8601 timestamp when the comment was created
idstringUnique identifier for this comment
parentCommentIDstringID of the parent comment if this is a reply (null for top-level comments)
parentEntityIDnumberID of the parent entity (event, market, etc.)
parentEntityTypestringType of parent entity (e.g., “Event”, “Market”)
profileobjectProfile information of the user who created the comment
reactionCountnumberCurrent number of reactions on this comment
replyAddressstringPolygon address for replies (may be different from userAddress)
reportCountnumberCurrent number of reports on this comment
userAddressstringPolygon address of the user who created the comment

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Profile Object Fields

FieldTypeDescription
baseAddressstringUser profile address
displayUsernamePublicbooleanWhether the username should be displayed publicly
namestringUser’s display name
proxyWalletstringProxy wallet address used for transactions
pseudonymstringGenerated pseudonym for the user

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Parent Entity Types

The following parent entity types are supported:
  • Event - Comments on prediction events
  • Market - Comments on specific markets
  • Additional entity types may be available

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Example Messages

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New Comment Created

{
  "topic": "comments",
  "type": "comment_created",
  "timestamp": 1753454975808,
  "payload": {
    "body": "do you know what the term encircle means? it means to surround from all sides, Russia has present on only 1 side, that's the opposite of an encirclement",
    "createdAt": "2025-07-25T14:49:35.801298Z",
    "id": "1763355",
    "parentCommentID": "1763325",
    "parentEntityID": 18396,
    "parentEntityType": "Event",
    "profile": {
      "baseAddress": "0xce533188d53a16ed580fd5121dedf166d3482677",
      "displayUsernamePublic": true,
      "name": "salted.caramel",
      "proxyWallet": "0x4ca749dcfa93c87e5ee23e2d21ff4422c7a4c1ee",
      "pseudonym": "Adored-Disparity"
    },
    "reactionCount": 0,
    "replyAddress": "0x0bda5d16f76cd1d3485bcc7a44bc6fa7db004cdd",
    "reportCount": 0,
    "userAddress": "0xce533188d53a16ed580fd5121dedf166d3482677"
  }
}

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Reply to Existing Comment

{
  "topic": "comments",
  "type": "comment_created",
  "timestamp": 1753454985123,
  "payload": {
    "body": "That's a good point about the definition of encirclement.",
    "createdAt": "2025-07-25T14:49:45.120000Z",
    "id": "1763356",
    "parentCommentID": "1763355",
    "parentEntityID": 18396,
    "parentEntityType": "Event",
    "profile": {
      "baseAddress": "0x1234567890abcdef1234567890abcdef12345678",
      "displayUsernamePublic": true,
      "name": "trader",
      "proxyWallet": "0x9876543210fedcba9876543210fedcba98765432",
      "pseudonym": "Bright-Analysis"
    },
    "reactionCount": 0,
    "replyAddress": "0x0bda5d16f76cd1d3485bcc7a44bc6fa7db004cdd",
    "reportCount": 0,
    "userAddress": "0x1234567890abcdef1234567890abcdef12345678"
  }
}

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Comment Hierarchy

Comments support nested threading:
  • Top-level comments: parentCommentID is null or empty
  • Reply comments: parentCommentID contains the ID of the parent comment
  • All comments are associated with a parentEntityID and parentEntityType

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Use Cases

  • Real-time comment feed displays
  • Discussion thread monitoring
  • Community sentiment analysis

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Content

  • Comments include reactionCount and reportCount
  • Comment body contains the full text content

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Notes

  • The createdAt timestamp uses ISO 8601 format with timezone information
  • The outer timestamp field represents when the WebSocket message was sent
  • User profiles include both primary addresses and proxy wallet addresses