Claude Messages

Create a message

POST https://api.aisa.one/v1/messages

Create a message

cURL

curl --request POST \
  --url https://api.aisa.one/v1/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "claude-sonnet-4-6",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello, Claude"
    }
  ],
  "system": "<string>",
  "temperature": 1,
  "top_p": 123,
  "top_k": 123,
  "stop_sequences": [
    "<string>"
  ],
  "stream": false,
  "tools": [
    {
      "name": "<string>",
      "input_schema": {},
      "description": "<string>",
      "type": "custom"
    }
  ],
  "tool_choice": {
    "name": "<string>",
    "disable_parallel_tool_use": false
  },
  "thinking": {
    "type": "enabled",
    "budget_tokens": 10000
  },
  "metadata": {
    "user_id": "<string>"
  },
  "service_tier": "auto"
}
'

import requests

url = "https://api.aisa.one/v1/messages"

payload = {
    "model": "claude-sonnet-4-6",
    "max_tokens": 1024,
    "messages": [
        {
            "role": "user",
            "content": "Hello, Claude"
        }
    ],
    "system": "<string>",
    "temperature": 1,
    "top_p": 123,
    "top_k": 123,
    "stop_sequences": ["<string>"],
    "stream": False,
    "tools": [
        {
            "name": "<string>",
            "input_schema": {},
            "description": "<string>",
            "type": "custom"
        }
    ],
    "tool_choice": {
        "name": "<string>",
        "disable_parallel_tool_use": False
    },
    "thinking": {
        "type": "enabled",
        "budget_tokens": 10000
    },
    "metadata": { "user_id": "<string>" },
    "service_tier": "auto"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    model: 'claude-sonnet-4-6',
    max_tokens: 1024,
    messages: [{role: 'user', content: 'Hello, Claude'}],
    system: '<string>',
    temperature: 1,
    top_p: 123,
    top_k: 123,
    stop_sequences: ['<string>'],
    stream: false,
    tools: [{name: '<string>', input_schema: {}, description: '<string>', type: 'custom'}],
    tool_choice: {name: '<string>', disable_parallel_tool_use: false},
    thinking: {type: 'enabled', budget_tokens: 10000},
    metadata: {user_id: '<string>'},
    service_tier: 'auto'
  })
};

fetch('https://api.aisa.one/v1/messages', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.aisa.one/v1/messages",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'model' => 'claude-sonnet-4-6',
    'max_tokens' => 1024,
    'messages' => [
        [
                'role' => 'user',
                'content' => 'Hello, Claude'
        ]
    ],
    'system' => '<string>',
    'temperature' => 1,
    'top_p' => 123,
    'top_k' => 123,
    'stop_sequences' => [
        '<string>'
    ],
    'stream' => false,
    'tools' => [
        [
                'name' => '<string>',
                'input_schema' => [
                                
                ],
                'description' => '<string>',
                'type' => 'custom'
        ]
    ],
    'tool_choice' => [
        'name' => '<string>',
        'disable_parallel_tool_use' => false
    ],
    'thinking' => [
        'type' => 'enabled',
        'budget_tokens' => 10000
    ],
    'metadata' => [
        'user_id' => '<string>'
    ],
    'service_tier' => 'auto'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.aisa.one/v1/messages"

	payload := strings.NewReader("{\n  \"model\": \"claude-sonnet-4-6\",\n  \"max_tokens\": 1024,\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude\"\n    }\n  ],\n  \"system\": \"<string>\",\n  \"temperature\": 1,\n  \"top_p\": 123,\n  \"top_k\": 123,\n  \"stop_sequences\": [\n    \"<string>\"\n  ],\n  \"stream\": false,\n  \"tools\": [\n    {\n      \"name\": \"<string>\",\n      \"input_schema\": {},\n      \"description\": \"<string>\",\n      \"type\": \"custom\"\n    }\n  ],\n  \"tool_choice\": {\n    \"name\": \"<string>\",\n    \"disable_parallel_tool_use\": false\n  },\n  \"thinking\": {\n    \"type\": \"enabled\",\n    \"budget_tokens\": 10000\n  },\n  \"metadata\": {\n    \"user_id\": \"<string>\"\n  },\n  \"service_tier\": \"auto\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.aisa.one/v1/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"model\": \"claude-sonnet-4-6\",\n  \"max_tokens\": 1024,\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude\"\n    }\n  ],\n  \"system\": \"<string>\",\n  \"temperature\": 1,\n  \"top_p\": 123,\n  \"top_k\": 123,\n  \"stop_sequences\": [\n    \"<string>\"\n  ],\n  \"stream\": false,\n  \"tools\": [\n    {\n      \"name\": \"<string>\",\n      \"input_schema\": {},\n      \"description\": \"<string>\",\n      \"type\": \"custom\"\n    }\n  ],\n  \"tool_choice\": {\n    \"name\": \"<string>\",\n    \"disable_parallel_tool_use\": false\n  },\n  \"thinking\": {\n    \"type\": \"enabled\",\n    \"budget_tokens\": 10000\n  },\n  \"metadata\": {\n    \"user_id\": \"<string>\"\n  },\n  \"service_tier\": \"auto\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.aisa.one/v1/messages")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"model\": \"claude-sonnet-4-6\",\n  \"max_tokens\": 1024,\n  \"messages\": [\n    {\n      \"role\": \"user\",\n      \"content\": \"Hello, Claude\"\n    }\n  ],\n  \"system\": \"<string>\",\n  \"temperature\": 1,\n  \"top_p\": 123,\n  \"top_k\": 123,\n  \"stop_sequences\": [\n    \"<string>\"\n  ],\n  \"stream\": false,\n  \"tools\": [\n    {\n      \"name\": \"<string>\",\n      \"input_schema\": {},\n      \"description\": \"<string>\",\n      \"type\": \"custom\"\n    }\n  ],\n  \"tool_choice\": {\n    \"name\": \"<string>\",\n    \"disable_parallel_tool_use\": false\n  },\n  \"thinking\": {\n    \"type\": \"enabled\",\n    \"budget_tokens\": 10000\n  },\n  \"metadata\": {\n    \"user_id\": \"<string>\"\n  },\n  \"service_tier\": \"auto\"\n}"

response = http.request(request)
puts response.read_body

200

{
  "id": "msg_024e7cf42f5d47cfa6982b5ff8b55642",
  "type": "message",
  "role": "assistant",
  "content": [
    {}
  ],
  "model": "claude-sonnet-4-6",
  "stop_sequence": "<string>",
  "usage": {
    "input_tokens": 123,
    "output_tokens": 123,
    "cache_creation_input_tokens": 123,
    "cache_read_input_tokens": 123
  }
}

Creates a Claude model response using the Anthropic-compatible Messages API. This endpoint mirrors the Anthropic /v1/messages specification, routed through the AIsa gateway at https://api.aisa.one/v1/messages.

Use this endpoint when you want to call Claude models (claude-opus-4-7, claude-sonnet-4-6, claude-haiku-4-5-20251001, etc.) with Anthropic’s native request format — including extended thinking, tool use, and prompt caching. If you prefer OpenAI-style chat completions, the same Claude models are also available via the OpenAI Chat endpoint.

Authentication uses your AIsa API key as a Bearer token. See the model catalog for the full list of supported Claude variants and context windows, and pricing for per-token rates.

Authorizations

Authorization · string · header · required

Your AIsa API key as a Bearer token.

Body

application/json

model · string · required

Claude model identifier. Examples: claude-opus-4-7, claude-sonnet-4-6, claude-haiku-4-5-20251001.

Example:

"claude-sonnet-4-6"

max_tokens · integer · required

Maximum number of tokens to generate before stopping.

Example:

1024

messages · object[] · required

Conversation turns.

Show child attributes

Example:

[
  {
    "role": "user",
    "content": "Hello, Claude"
  }
]

system · string object[]

System prompt. String or array of text blocks.

temperature · number<float> · default: 1

Randomness. 0 = deterministic, 1 = creative.

Required range: 0 <= x <= 1

top_p · number<float>

Nucleus sampling. Use instead of temperature.

top_k · integer

Only sample from the top K options for each token.

stop_sequences · string[]

Custom sequences that stop generation.

stream · boolean · default: false

Enable SSE streaming.

tools · object[]

Tools the model may use.

Show child attributes

tool_choice · object

How the model uses tools.

Show child attributes

thinking · object

Enable extended thinking for complex reasoning.

Show child attributes

metadata · object

Show child attributes

service_tier · enum<string> · default: auto

Available options: auto, standard_only

Response

200

application/json

Successful response

id · string

Example:

"msg_024e7cf42f5d47cfa6982b5ff8b55642"

type · string

Example:

"message"

role · string

Example:

"assistant"

content · object[]

Response content blocks (text, tool_use, thinking, etc.).

model · string

Example:

"claude-sonnet-4-6"

stop_reason · enum<string>

Available options: end_turn, stop_sequence, max_tokens, tool_use

stop_sequence · string | null

usage · object

Show child attributes