Find all users within a thread of gmail API - google-api

Question

I am using the gmail API to get recent hangouts messages/threads. But I can't find a way to view the recipient address. The only field in payload.headers is 'From'
code:
curl -H 'Authorization: Bearer **accessToken**' 'https://www.googleapis.com/gmail/v1/users/me/threads/**threadId**?q=is%3Achat'
response:
{
"id": "xxx",
"historyId": "1008967",
"messages": [{
"id": "xxx",
"threadId": "xxx",
"labelIds": [
"CHAT"
],
"snippet": "+Harry Howard",
"historyId": "1008953",
"internalDate": "1481641738948",
"payload": {
"partId": "",
"mimeType": "text/html",
"filename": "",
"headers": [{
"name": "From",
"value": "xxx"
}],
"body": {
"size": 13,
"data": "K0hhcnJ5IEhvd2FyZA=="
}
},
"sizeEstimate": 100
}]
}
In the case of emails, there is a 'To' field ( and sometimes cc etc).
FYI: I am using node-gmail-api npm module but just testing this with curl

Answer 1

Use Users.threads:list to find all users within a thread. See an example here.
HTTP request
GET https://www.googleapis.com/gmail/v1/users/userId/threads
This request requires authorization with at least one of the following scopes
https://mail.google.com/
https://www.googleapis.com/auth/gmail.modify
https://www.googleapis.com/auth/gmail.readonly
https://www.googleapis.com/auth/gmail.metadata
Response
If successful, this method returns a response body with the following structure:
{
"threads": [
users.threads Resource
],
"nextPageToken": string,
"resultSizeEstimate": unsigned integer
}