Update an existing participant in the conversation

POST /v1/Services/{ChatServiceSid}/Conversations/{ConversationSid}/Participants/{Sid}

A Service Participant resource represents a member of the conversation within a specific service.

Headers

X-Twilio-Webhook-Enabled string

The X-Twilio-Webhook-Enabled HTTP request header

Values are true or false.

Path parameters

ChatServiceSid string Required

The SID of the Conversation Service the Participant resource is associated with.
ConversationSid string Required

The unique ID of the Conversation for this participant.
Sid string Required

A 34 character string that uniquely identifies this resource.

Body

Attributes string

An optional string metadata field you can use to store any data you wish. The string value must contain structurally valid JSON if specified. Note that if the attributes are not set "{}" will be returned.
DateCreated string(date-time)

The date that this resource was created.
DateUpdated string(date-time)

The date that this resource was last updated.
Identity string

A unique string identifier for the conversation participant as Conversation User. This parameter is non-null if (and only if) the participant is using the Conversation SDK to communicate. Limited to 256 characters.
LastReadMessageIndex integer | null

Index of last “read” message in the Conversation for the Participant.
LastReadTimestamp string

Timestamp of last “read” message in the Conversation for the Participant.
MessagingBinding.ProjectedAddress string

The address of the Twilio phone number that is used in Group MMS. 'null' value will remove it.
MessagingBinding.ProxyAddress string

The address of the Twilio phone number that the participant is in contact with. 'null' value will remove it.
RoleSid string

The SID of a conversation-level Role to assign to the participant.

Minimum length is 34, maximum length is 34. Format should match the following pattern: ^RL[0-9a-fA-F]{32}$.

Responses

200

OK
Hide response attributes Show response attributes object
- account_sid string | null
  
  The unique ID of the Account responsible for this participant.
  
  Minimum length is 34, maximum length is 34. Format should match the following pattern: ^AC[0-9a-fA-F]{32}$.
- attributes string | null
  
  An optional string metadata field you can use to store any data you wish.
- chat_service_sid string | null
  
  The SID of the Conversation Service that the resource is associated with.
  
  Minimum length is 34, maximum length is 34. Format should match the following pattern: ^IS[0-9a-fA-F]{32}$.
- conversation_sid string | null
  
  The unique ID of the Conversation for this participant.
  
  Minimum length is 34, maximum length is 34. Format should match the following pattern: ^CH[0-9a-fA-F]{32}$.
- date_created string(date-time) | null
  
  The date that this resource was created.
- date_updated string(date-time) | null
  
  The date that this resource was last updated.
- identity string | null
  
  A unique string identifier for the conversation participant as Conversation User.
- last_read_message_index integer | null
  
  Index of last “read” message in the Conversation for the Participant.
- last_read_timestamp string | null
  
  Timestamp of last “read” message in the Conversation for the Participant.
- messaging_binding
  
  Information about how this participant exchanges messages with the conversation.
- role_sid string | null
  
  The SID of a conversation-level Role to assign to the participant
  
  Minimum length is 34, maximum length is 34. Format should match the following pattern: ^RL[0-9a-fA-F]{32}$.
- sid string | null
  
  A 34 character string that uniquely identifies this resource.
  
  Minimum length is 34, maximum length is 34. Format should match the following pattern: ^MB[0-9a-fA-F]{32}$.
- url string(uri) | null
  
  An absolute URL for this participant.

POST /v1/Services/{ChatServiceSid}/Conversations/{ConversationSid}/Participants/{Sid}

curl \
 -X POST https://conversations.twilio.com/v1/Services/{ChatServiceSid}/Conversations/{ConversationSid}/Participants/{Sid} \
 --user "username:password" \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -H "X-Twilio-Webhook-Enabled: true" \
 -d 'Attributes=string&DateCreated=2023-05-04T09%3A42%3A00%2B00%3A00&DateUpdated=2023-05-04T09%3A42%3A00%2B00%3A00&Identity=string&LastReadMessageIndex=42&LastReadTimestamp=string&MessagingBinding.ProjectedAddress=string&MessagingBinding.ProxyAddress=string&RoleSid=string'

Request example

# Headers
X-Twilio-Webhook-Enabled: true

# Payload
{
  "Attributes": "string",
  "DateCreated": "2023-05-04T09:42:00+00:00",
  "DateUpdated": "2023-05-04T09:42:00+00:00",
  "Identity": "string",
  "LastReadMessageIndex": 42,
  "LastReadTimestamp": "string",
  "MessagingBinding.ProjectedAddress": "string",
  "MessagingBinding.ProxyAddress": "string",
  "RoleSid": "string"
}

Request examples

# Headers
X-Twilio-Webhook-Enabled: true

# Payload
{
  "Attributes": "string",
  "DateCreated": "2025-05-04T09:42:00Z",
  "DateUpdated": "2025-05-04T09:42:00Z",
  "Identity": "string",
  "LastReadMessageIndex": 42,
  "LastReadTimestamp": "string",
  "MessagingBinding.ProjectedAddress": "string",
  "MessagingBinding.ProxyAddress": "string",
  "RoleSid": "string"
}

Response examples (200)

{
  "account_sid": "string",
  "attributes": "string",
  "chat_service_sid": "string",
  "conversation_sid": "string",
  "date_created": "2023-05-04T09:42:00+00:00",
  "date_updated": "2023-05-04T09:42:00+00:00",
  "identity": "string",
  "last_read_message_index": 42,
  "last_read_timestamp": "string",
  "role_sid": "string",
  "sid": "string",
  "url": "https://example.com"
}

Response examples (200)

{
  "account_sid": "string",
  "attributes": "string",
  "chat_service_sid": "string",
  "conversation_sid": "string",
  "date_created": "2025-05-04T09:42:00Z",
  "date_updated": "2025-05-04T09:42:00Z",
  "identity": "string",
  "last_read_message_index": 42,
  "last_read_timestamp": "string",
  "role_sid": "string",
  "sid": "string",
  "url": "https://example.com"
}