curl --request POST \
--url https://api.antarah.dev/v1/messages \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "a1",
"messages": [
{
"role": "user",
"content": "<string>"
}
],
"max_tokens": 2,
"system": "<string>",
"tools": [
{
"name": "<string>",
"type": "<string>",
"description": "<string>",
"input_schema": {}
}
],
"temperature": 0.5,
"top_p": 0.5,
"stop_sequences": [
"<string>"
],
"tool_choice": {
"type": "auto",
"disable_parallel_tool_use": true
},
"thinking": false,
"output_config": {},
"top_k": 123,
"stream": true,
"include_reasoning": true,
"policy_ids": [
"<string>"
],
"metadata": {
"user_id": "<string>"
},
"service_tier": "<string>",
"context_management": "<unknown>"
}
'import requests
url = "https://api.antarah.dev/v1/messages"
payload = {
"model": "a1",
"messages": [
{
"role": "user",
"content": "<string>"
}
],
"max_tokens": 2,
"system": "<string>",
"tools": [
{
"name": "<string>",
"type": "<string>",
"description": "<string>",
"input_schema": {}
}
],
"temperature": 0.5,
"top_p": 0.5,
"stop_sequences": ["<string>"],
"tool_choice": {
"type": "auto",
"disable_parallel_tool_use": True
},
"thinking": False,
"output_config": {},
"top_k": 123,
"stream": True,
"include_reasoning": True,
"policy_ids": ["<string>"],
"metadata": { "user_id": "<string>" },
"service_tier": "<string>",
"context_management": "<unknown>"
}
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: 'a1',
messages: [{role: 'user', content: '<string>'}],
max_tokens: 2,
system: '<string>',
tools: [
{name: '<string>', type: '<string>', description: '<string>', input_schema: {}}
],
temperature: 0.5,
top_p: 0.5,
stop_sequences: ['<string>'],
tool_choice: {type: 'auto', disable_parallel_tool_use: true},
thinking: false,
output_config: {},
top_k: 123,
stream: true,
include_reasoning: true,
policy_ids: ['<string>'],
metadata: {user_id: '<string>'},
service_tier: '<string>',
context_management: '<unknown>'
})
};
fetch('https://api.antarah.dev/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.antarah.dev/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' => 'a1',
'messages' => [
[
'role' => 'user',
'content' => '<string>'
]
],
'max_tokens' => 2,
'system' => '<string>',
'tools' => [
[
'name' => '<string>',
'type' => '<string>',
'description' => '<string>',
'input_schema' => [
]
]
],
'temperature' => 0.5,
'top_p' => 0.5,
'stop_sequences' => [
'<string>'
],
'tool_choice' => [
'type' => 'auto',
'disable_parallel_tool_use' => true
],
'thinking' => false,
'output_config' => [
],
'top_k' => 123,
'stream' => true,
'include_reasoning' => true,
'policy_ids' => [
'<string>'
],
'metadata' => [
'user_id' => '<string>'
],
'service_tier' => '<string>',
'context_management' => '<unknown>'
]),
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.antarah.dev/v1/messages"
payload := strings.NewReader("{\n \"model\": \"a1\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"<string>\"\n }\n ],\n \"max_tokens\": 2,\n \"system\": \"<string>\",\n \"tools\": [\n {\n \"name\": \"<string>\",\n \"type\": \"<string>\",\n \"description\": \"<string>\",\n \"input_schema\": {}\n }\n ],\n \"temperature\": 0.5,\n \"top_p\": 0.5,\n \"stop_sequences\": [\n \"<string>\"\n ],\n \"tool_choice\": {\n \"type\": \"auto\",\n \"disable_parallel_tool_use\": true\n },\n \"thinking\": false,\n \"output_config\": {},\n \"top_k\": 123,\n \"stream\": true,\n \"include_reasoning\": true,\n \"policy_ids\": [\n \"<string>\"\n ],\n \"metadata\": {\n \"user_id\": \"<string>\"\n },\n \"service_tier\": \"<string>\",\n \"context_management\": \"<unknown>\"\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.antarah.dev/v1/messages")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"a1\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"<string>\"\n }\n ],\n \"max_tokens\": 2,\n \"system\": \"<string>\",\n \"tools\": [\n {\n \"name\": \"<string>\",\n \"type\": \"<string>\",\n \"description\": \"<string>\",\n \"input_schema\": {}\n }\n ],\n \"temperature\": 0.5,\n \"top_p\": 0.5,\n \"stop_sequences\": [\n \"<string>\"\n ],\n \"tool_choice\": {\n \"type\": \"auto\",\n \"disable_parallel_tool_use\": true\n },\n \"thinking\": false,\n \"output_config\": {},\n \"top_k\": 123,\n \"stream\": true,\n \"include_reasoning\": true,\n \"policy_ids\": [\n \"<string>\"\n ],\n \"metadata\": {\n \"user_id\": \"<string>\"\n },\n \"service_tier\": \"<string>\",\n \"context_management\": \"<unknown>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.antarah.dev/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\": \"a1\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"<string>\"\n }\n ],\n \"max_tokens\": 2,\n \"system\": \"<string>\",\n \"tools\": [\n {\n \"name\": \"<string>\",\n \"type\": \"<string>\",\n \"description\": \"<string>\",\n \"input_schema\": {}\n }\n ],\n \"temperature\": 0.5,\n \"top_p\": 0.5,\n \"stop_sequences\": [\n \"<string>\"\n ],\n \"tool_choice\": {\n \"type\": \"auto\",\n \"disable_parallel_tool_use\": true\n },\n \"thinking\": false,\n \"output_config\": {},\n \"top_k\": 123,\n \"stream\": true,\n \"include_reasoning\": true,\n \"policy_ids\": [\n \"<string>\"\n ],\n \"metadata\": {\n \"user_id\": \"<string>\"\n },\n \"service_tier\": \"<string>\",\n \"context_management\": \"<unknown>\"\n}"
response = http.request(request)
puts response.read_body{
"id": "msg_0193a6c2e7b47c3d9f1e2a4b5c6d7e8f",
"type": "message",
"role": "assistant",
"model": "a1",
"content": [
{
"type": "thinking",
"thinking": "<string>",
"signature": ""
}
],
"stop_reason": "end_turn",
"stop_sequence": "<string>",
"usage": {
"input_tokens": 123,
"output_tokens": 123,
"cache_read_input_tokens": 123
}
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}Create a message
curl --request POST \
--url https://api.antarah.dev/v1/messages \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"model": "a1",
"messages": [
{
"role": "user",
"content": "<string>"
}
],
"max_tokens": 2,
"system": "<string>",
"tools": [
{
"name": "<string>",
"type": "<string>",
"description": "<string>",
"input_schema": {}
}
],
"temperature": 0.5,
"top_p": 0.5,
"stop_sequences": [
"<string>"
],
"tool_choice": {
"type": "auto",
"disable_parallel_tool_use": true
},
"thinking": false,
"output_config": {},
"top_k": 123,
"stream": true,
"include_reasoning": true,
"policy_ids": [
"<string>"
],
"metadata": {
"user_id": "<string>"
},
"service_tier": "<string>",
"context_management": "<unknown>"
}
'import requests
url = "https://api.antarah.dev/v1/messages"
payload = {
"model": "a1",
"messages": [
{
"role": "user",
"content": "<string>"
}
],
"max_tokens": 2,
"system": "<string>",
"tools": [
{
"name": "<string>",
"type": "<string>",
"description": "<string>",
"input_schema": {}
}
],
"temperature": 0.5,
"top_p": 0.5,
"stop_sequences": ["<string>"],
"tool_choice": {
"type": "auto",
"disable_parallel_tool_use": True
},
"thinking": False,
"output_config": {},
"top_k": 123,
"stream": True,
"include_reasoning": True,
"policy_ids": ["<string>"],
"metadata": { "user_id": "<string>" },
"service_tier": "<string>",
"context_management": "<unknown>"
}
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: 'a1',
messages: [{role: 'user', content: '<string>'}],
max_tokens: 2,
system: '<string>',
tools: [
{name: '<string>', type: '<string>', description: '<string>', input_schema: {}}
],
temperature: 0.5,
top_p: 0.5,
stop_sequences: ['<string>'],
tool_choice: {type: 'auto', disable_parallel_tool_use: true},
thinking: false,
output_config: {},
top_k: 123,
stream: true,
include_reasoning: true,
policy_ids: ['<string>'],
metadata: {user_id: '<string>'},
service_tier: '<string>',
context_management: '<unknown>'
})
};
fetch('https://api.antarah.dev/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.antarah.dev/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' => 'a1',
'messages' => [
[
'role' => 'user',
'content' => '<string>'
]
],
'max_tokens' => 2,
'system' => '<string>',
'tools' => [
[
'name' => '<string>',
'type' => '<string>',
'description' => '<string>',
'input_schema' => [
]
]
],
'temperature' => 0.5,
'top_p' => 0.5,
'stop_sequences' => [
'<string>'
],
'tool_choice' => [
'type' => 'auto',
'disable_parallel_tool_use' => true
],
'thinking' => false,
'output_config' => [
],
'top_k' => 123,
'stream' => true,
'include_reasoning' => true,
'policy_ids' => [
'<string>'
],
'metadata' => [
'user_id' => '<string>'
],
'service_tier' => '<string>',
'context_management' => '<unknown>'
]),
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.antarah.dev/v1/messages"
payload := strings.NewReader("{\n \"model\": \"a1\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"<string>\"\n }\n ],\n \"max_tokens\": 2,\n \"system\": \"<string>\",\n \"tools\": [\n {\n \"name\": \"<string>\",\n \"type\": \"<string>\",\n \"description\": \"<string>\",\n \"input_schema\": {}\n }\n ],\n \"temperature\": 0.5,\n \"top_p\": 0.5,\n \"stop_sequences\": [\n \"<string>\"\n ],\n \"tool_choice\": {\n \"type\": \"auto\",\n \"disable_parallel_tool_use\": true\n },\n \"thinking\": false,\n \"output_config\": {},\n \"top_k\": 123,\n \"stream\": true,\n \"include_reasoning\": true,\n \"policy_ids\": [\n \"<string>\"\n ],\n \"metadata\": {\n \"user_id\": \"<string>\"\n },\n \"service_tier\": \"<string>\",\n \"context_management\": \"<unknown>\"\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.antarah.dev/v1/messages")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"a1\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"<string>\"\n }\n ],\n \"max_tokens\": 2,\n \"system\": \"<string>\",\n \"tools\": [\n {\n \"name\": \"<string>\",\n \"type\": \"<string>\",\n \"description\": \"<string>\",\n \"input_schema\": {}\n }\n ],\n \"temperature\": 0.5,\n \"top_p\": 0.5,\n \"stop_sequences\": [\n \"<string>\"\n ],\n \"tool_choice\": {\n \"type\": \"auto\",\n \"disable_parallel_tool_use\": true\n },\n \"thinking\": false,\n \"output_config\": {},\n \"top_k\": 123,\n \"stream\": true,\n \"include_reasoning\": true,\n \"policy_ids\": [\n \"<string>\"\n ],\n \"metadata\": {\n \"user_id\": \"<string>\"\n },\n \"service_tier\": \"<string>\",\n \"context_management\": \"<unknown>\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.antarah.dev/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\": \"a1\",\n \"messages\": [\n {\n \"role\": \"user\",\n \"content\": \"<string>\"\n }\n ],\n \"max_tokens\": 2,\n \"system\": \"<string>\",\n \"tools\": [\n {\n \"name\": \"<string>\",\n \"type\": \"<string>\",\n \"description\": \"<string>\",\n \"input_schema\": {}\n }\n ],\n \"temperature\": 0.5,\n \"top_p\": 0.5,\n \"stop_sequences\": [\n \"<string>\"\n ],\n \"tool_choice\": {\n \"type\": \"auto\",\n \"disable_parallel_tool_use\": true\n },\n \"thinking\": false,\n \"output_config\": {},\n \"top_k\": 123,\n \"stream\": true,\n \"include_reasoning\": true,\n \"policy_ids\": [\n \"<string>\"\n ],\n \"metadata\": {\n \"user_id\": \"<string>\"\n },\n \"service_tier\": \"<string>\",\n \"context_management\": \"<unknown>\"\n}"
response = http.request(request)
puts response.read_body{
"id": "msg_0193a6c2e7b47c3d9f1e2a4b5c6d7e8f",
"type": "message",
"role": "assistant",
"model": "a1",
"content": [
{
"type": "thinking",
"thinking": "<string>",
"signature": ""
}
],
"stop_reason": "end_turn",
"stop_sequence": "<string>",
"usage": {
"input_tokens": 123,
"output_tokens": 123,
"cache_read_input_tokens": 123
}
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}{
"type": "error",
"error": {
"type": "invalid_request_error",
"message": "<string>",
"code": "<string>"
},
"request_id": "<string>"
}Authorizations
ak_… project API key (or x-api-key)
Body
Rejected with 400 unsupported_parameter: top_k, server tools, document blocks, container, mcp_servers, and any field not listed here.
Public model ID, e.g. a1 (A-05)
1"a1"
1 - 10000 elements- Option 1
- Option 2
Show child attributes
Show child attributes
Required. 1…the model's max_output_tokens
x >= 1128Show child attributes
Show child attributes
0–1 (Anthropic's range)
0 <= x <= 10 <= x <= 14- Option 1
- Option 2
- Option 3
- Option 4
Show child attributes
Show child attributes
budget_tokens maps to a reasoning effort; output_config.effort wins
false Show child attributes
Show child attributes
Rejected: 400 unsupported_parameter
Default false
false drops thinking blocks from the output
Antara extension: published policies to add for this request
201 - 120Show child attributes
Show child attributes
Response
application/json when stream is false; otherwise text/event-stream: event: <type> + data: <MessageStreamEvent>, ending with message_stop
^msg_[0-9a-f]{32}$"msg_0193a6c2e7b47c3d9f1e2a4b5c6d7e8f"
message assistant "a1"
- Option 1
- Option 2
- Option 3
Show child attributes
Show child attributes
end_turn, max_tokens, stop_sequence, tool_use, refusal, null Show child attributes
Show child attributes
