Claude messages | Linkinfra API Docs

POST/v1/messages

Base URLhttps://api.linkinfra.ai

Authorization Body Response

Authorization

Bearer Token

AuthorizationBearer <token>

Authenticate requests with your API key in the request header:

Authorization: Bearer sk-your-api-key

Need a key? Create one in the console

anthropic-version2023-06-01

This endpoint accepts Authorization: Bearer and x-api-key. When using the Anthropic SDK, set base_url to the API root without /v1.

Request body

application/json

modelstringrequired

Model ID from the model catalog. Availability depends on your account group and configured channels.

messagesarray<object>required

A list of user and assistant messages. Put the system prompt in system.

max_tokensintegerrequired

Maximum number of generated tokens.

systemstring | array

System prompt text or content blocks.

streamboolean

Set to true to receive incremental Server-Sent Events. Defaults to false.

Streaming

Streaming follows Anthropic SSE events, including message_start, content_block_delta, and message_stop.

Response

application/json

200Successful response

contentarray<object>

Generated content blocks. Text blocks have type text.

stop_reasonstring

Stop reason, such as end_turn, max_tokens, or tool_use.

usageobject

Token usage for this request. Check usage logs in the console for actual charges.

Request failed? Read the error handling guide

curl --request POST 'https://api.linkinfra.ai/v1/messages' \ --header "Authorization: Bearer $LINKINFRA_API_KEY" \ --header 'anthropic-version: 2023-06-01' \ --header "Content-Type: application/json" \ --data '{ "model": "claude-sonnet-4-20250514", "max_tokens": 1024, "messages": [ { "role": "user", "content": "Hello, Claude!" } ] }'

{ "id": "msg_example", "type": "message", "role": "assistant", "model": "claude-sonnet-4-20250514", "content": [ { "type": "text", "text": "Hello! How can I help you today?" } ], "stop_reason": "end_turn", "usage": { "input_tokens": 11, "output_tokens": 12 } }