Messages (Anthropic)

Send messages using the Anthropic-compatible Genesis Messages API and return generated content.

POST https://token.moi.matrixorigin.cn/v1/messages

Before you call

Prepare credentials with Genesis access and a model ID that supports the Messages request shape.

Request body

Replace $GENESIS_ACCESS_TOKEN with an access token or service-account API key, and $MODEL_ID with the model ID to call.

Request example

curl -X POST \
  "https://token.moi.matrixorigin.cn/v1/messages" \
  -H "Authorization: Bearer $GENESIS_ACCESS_TOKEN" \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "'"$MODEL_ID"'",
    "max_tokens": 256,
    "messages": [{"role":"user","content":"Explain data lineage in one sentence."}],
    "stream": false
  }'

Parameter description

Parameters

Field	Type	Required	Description
model	string	Yes	Anthropic Messages model ID to call.
max_tokens	integer	Yes	Maximum tokens to generate.
messages	array of object	Yes	Ordered list of messages to submit.
stream	boolean	No	Set to true to return Anthropic Messages SSE events.

Message item

Field	Type	Required	Description
role	string	Yes	Message role.
content	string	Yes	Text content of the message.

Successful response

The service returns generated content in the content array.

Response example

{
  "id": "<MESSAGE_ID>",
  "type": "message",
  "role": "assistant",
  "model": "<MODEL_ID>",
  "content": [{"type":"text","text":"A transaction executes a group of operations as a whole to preserve data consistency."}],
  "stop_reason": "end_turn"
}

Field description

Common fields

Field	Type	Description
id	string	Identifier for this Message.
type	string	Response type; the example is message.
role	string	Role of the generated message.
model	string	Model ID that processed the request.
content	array of object	Generated content items.
stop_reason	string or null	Reason the current generation stopped.

Content item

Field	Type	Description
type	string	Content type; the example is text.
text	string	Generated text when the content type is text.
thinking	string	Reasoning content when the content type is thinking.

Error response

Response example

{"error":{"message":"<human-readable error message>","type":"<error type; may be omitted>","code":"<error code; may be omitted>"}}

Field description

Common fields

Field	Type	Description
error	object	Error object.

Error object

Field	Type	Description
message	string	Human-readable error message.
type	string	Error category returned by the model service; it may be omitted.
code	string or null	Error code returned by the model service; it may be omitted.

Last updated on Sep 3, 2026