> ## Documentation Index
> Fetch the complete documentation index at: https://docs.leadlex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Email Thread

> Retrieve a single email thread with its full message list

## Request

### Path Parameters

<ParamField path="id" type="string" required>
  Thread identifier, as returned by `GET /v1/email/threads`.
</ParamField>

### Query Parameters

<ParamField query="include_body" type="boolean" default="true">
  When `true`, the full HTML and text body of each message is returned. Set to `false` for a lightweight summary response.
</ParamField>

### Headers

```
Authorization: Bearer wbk_your_api_key_here
```

## Response

<ResponseField name="data" type="object">
  <Expandable title="properties">
    <ResponseField name="id" type="string">Thread identifier</ResponseField>
    <ResponseField name="subject" type="string">Thread subject</ResponseField>
    <ResponseField name="participants" type="array">Email addresses involved in the thread</ResponseField>
    <ResponseField name="contact_ids" type="array">Linked contact UUIDs</ResponseField>
    <ResponseField name="deal_id" type="string">Linked deal UUID, if any</ResponseField>

    <ResponseField name="messages" type="array">
      Ordered array of messages, oldest first

      <Expandable title="Message object">
        <ResponseField name="id" type="string">Message identifier</ResponseField>
        <ResponseField name="from" type="string">Sender address</ResponseField>
        <ResponseField name="to" type="array">Recipient addresses</ResponseField>
        <ResponseField name="cc" type="array">CC addresses</ResponseField>
        <ResponseField name="sent_at" type="string">ISO 8601 timestamp</ResponseField>
        <ResponseField name="direction" type="string">`inbound` or `outbound`</ResponseField>
        <ResponseField name="body_text" type="string">Plain-text body, when `include_body=true`</ResponseField>
        <ResponseField name="body_html" type="string">HTML body, when `include_body=true`</ResponseField>
        <ResponseField name="attachments" type="array">Metadata for each attachment (filename, mime\_type, size\_bytes)</ResponseField>
      </Expandable>
    </ResponseField>
  </Expandable>
</ResponseField>

Every response returns `X-RateLimit-Limit`, `X-RateLimit-Remaining`, `X-RateLimit-Reset`, and `X-Request-ID` headers.

<CodeGroup>
  ```bash cURL theme={null}
  curl https://data.leadlex.com/functions/v1/api-gateway/v1/email/threads/18c9a4b2e7ff21aa \
    -H "Authorization: Bearer wbk_your_api_key_here"
  ```

  ```python Python theme={null}
  import requests

  API_KEY = "wbk_your_api_key_here"
  thread_id = "18c9a4b2e7ff21aa"

  r = requests.get(
      f"https://data.leadlex.com/functions/v1/api-gateway/v1/email/threads/{thread_id}",
      headers={"Authorization": f"Bearer {API_KEY}"},
  )
  thread = r.json()["data"]
  print(thread["subject"], len(thread["messages"]))
  ```

  ```javascript JavaScript theme={null}
  const threadId = '18c9a4b2e7ff21aa';
  const res = await fetch(
    `https://data.leadlex.com/functions/v1/api-gateway/v1/email/threads/${threadId}`,
    { headers: { Authorization: 'Bearer wbk_your_api_key_here' } },
  );
  const { data } = await res.json();
  console.log(data.messages.length);
  ```
</CodeGroup>

### Example Response

```json theme={null}
{
  "data": {
    "id": "18c9a4b2e7ff21aa",
    "subject": "Proposal for Series B counsel",
    "participants": ["jane@example.com", "team@emasex.de"],
    "contact_ids": ["123e4567-e89b-12d3-a456-426614174000"],
    "deal_id": null,
    "messages": [
      {
        "id": "m1",
        "from": "jane@example.com",
        "to": ["team@emasex.de"],
        "cc": [],
        "sent_at": "2026-04-15T09:01:00Z",
        "direction": "inbound",
        "body_text": "Can you send over your standard engagement letter?",
        "body_html": "<p>Can you send over your standard engagement letter?</p>",
        "attachments": []
      }
    ]
  }
}
```

## Errors

| Status | Code                       | Description                                          |
| ------ | -------------------------- | ---------------------------------------------------- |
| 401    | `invalid_key`              | Invalid or expired API key                           |
| 403    | `insufficient_permissions` | Missing `read:email` permission                      |
| 404    | `not_found`                | No thread with the given ID exists in this workspace |
| 429    | `rate_limited`             | Rate limit exceeded                                  |