SSE token viewer

Paste raw SSE logs. The viewer reconstructs token streams by content block index and concatenates deltas into final text.

Input stream

Paste a raw SSE transcript from the model.

event: message_start
data:
{
  "type": "message_start",
  "message": {
    "model": "claude-opus-4-6",
    "id": "msg_01XW1YZF5LW2ZuLG6Ufti1xL",
    "type": "message",
    "role": "assistant",
    "content": [],
    "stop_reason": null,
    "stop_sequence": null,
    "usage": {
      "input_tokens": 3,
      "output_tokens": 12
    }
  }
}

event: content_block_start
data:
{
  "type": "content_block_start",
  "index": 0,
  "content_block": {
    "type": "thinking",
    "thinking": "",
    "signature": ""
  }
}

event: content_block_delta
data:
{
  "type": "content_block_delta",
  "index": 0,
  "delta": {
    "type": "thinking_delta",
    "thinking": "The user wants all"
  }
}

event: content_block_delta
data:
{
  "type": "content_block_delta",
  "index": 0,
  "delta": {
    "type": "thinking_delta",
    "thinking": " 10 echo calls made"
  }
}

event: content_block_start
data:
{
  "type": "content_block_start",
  "index": 1,
  "content_block": {
    "type": "tool_use",
    "id": "toolu_01CfGHkuubvLFTCwYeQdXi4c",
    "name": "Bash",
    "input": {}
  }
}

event: content_block_delta
data:
{
  "type": "content_block_delta",
  "index": 1,
  "delta": {
    "type": "input_json_delta",
    "partial_json": "{"command": "echo \"ONE\""}"
  }
}

Reconstructed assistant text

No assistant text blocks found yet.

Events

Content blocks

Stop reason

Message metadata

Model

claude-opus-4-6

Role

assistant

Message ID

msg_01XW1YZF5LW2ZuLG6Ufti1xL

Output tokens

Thinking stream

The user wants all 10 echo calls made

Content blocks

#0thinking

Text

The user wants all 10 echo calls made

#1tool_useBash