curl --request POST \
--url https://api.example.com/v1/chat/completions \
--header 'Content-Type: application/json' \
--data '
{
"model": "<string>",
"messages": [
{
"content": "<string>"
}
],
"stream": false,
"temperature": 123,
"top_p": 123,
"max_tokens": 123,
"max_completion_tokens": 123,
"stop": "<string>",
"frequency_penalty": 123,
"presence_penalty": 123,
"seed": 123,
"n": 123,
"stream_options": {
"include_usage": false
},
"tools": [
"<unknown>"
],
"tool_choice": null,
"response_format": {}
}
'import requests
url = "https://api.example.com/v1/chat/completions"
payload = {
"model": "<string>",
"messages": [{ "content": "<string>" }],
"stream": False,
"temperature": 123,
"top_p": 123,
"max_tokens": 123,
"max_completion_tokens": 123,
"stop": "<string>",
"frequency_penalty": 123,
"presence_penalty": 123,
"seed": 123,
"n": 123,
"stream_options": { "include_usage": False },
"tools": ["<unknown>"],
"tool_choice": None,
"response_format": {}
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
model: '<string>',
messages: [{content: '<string>'}],
stream: false,
temperature: 123,
top_p: 123,
max_tokens: 123,
max_completion_tokens: 123,
stop: '<string>',
frequency_penalty: 123,
presence_penalty: 123,
seed: 123,
n: 123,
stream_options: {include_usage: false},
tools: ['<unknown>'],
tool_choice: null,
response_format: {}
})
};
fetch('https://api.example.com/v1/chat/completions', 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.example.com/v1/chat/completions",
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' => '<string>',
'messages' => [
[
'content' => '<string>'
]
],
'stream' => false,
'temperature' => 123,
'top_p' => 123,
'max_tokens' => 123,
'max_completion_tokens' => 123,
'stop' => '<string>',
'frequency_penalty' => 123,
'presence_penalty' => 123,
'seed' => 123,
'n' => 123,
'stream_options' => [
'include_usage' => false
],
'tools' => [
'<unknown>'
],
'tool_choice' => null,
'response_format' => [
]
]),
CURLOPT_HTTPHEADER => [
"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.example.com/v1/chat/completions"
payload := strings.NewReader("{\n \"model\": \"<string>\",\n \"messages\": [\n {\n \"content\": \"<string>\"\n }\n ],\n \"stream\": false,\n \"temperature\": 123,\n \"top_p\": 123,\n \"max_tokens\": 123,\n \"max_completion_tokens\": 123,\n \"stop\": \"<string>\",\n \"frequency_penalty\": 123,\n \"presence_penalty\": 123,\n \"seed\": 123,\n \"n\": 123,\n \"stream_options\": {\n \"include_usage\": false\n },\n \"tools\": [\n \"<unknown>\"\n ],\n \"tool_choice\": null,\n \"response_format\": {}\n}")
req, _ := http.NewRequest("POST", url, payload)
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.example.com/v1/chat/completions")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"<string>\",\n \"messages\": [\n {\n \"content\": \"<string>\"\n }\n ],\n \"stream\": false,\n \"temperature\": 123,\n \"top_p\": 123,\n \"max_tokens\": 123,\n \"max_completion_tokens\": 123,\n \"stop\": \"<string>\",\n \"frequency_penalty\": 123,\n \"presence_penalty\": 123,\n \"seed\": 123,\n \"n\": 123,\n \"stream_options\": {\n \"include_usage\": false\n },\n \"tools\": [\n \"<unknown>\"\n ],\n \"tool_choice\": null,\n \"response_format\": {}\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.example.com/v1/chat/completions")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"model\": \"<string>\",\n \"messages\": [\n {\n \"content\": \"<string>\"\n }\n ],\n \"stream\": false,\n \"temperature\": 123,\n \"top_p\": 123,\n \"max_tokens\": 123,\n \"max_completion_tokens\": 123,\n \"stop\": \"<string>\",\n \"frequency_penalty\": 123,\n \"presence_penalty\": 123,\n \"seed\": 123,\n \"n\": 123,\n \"stream_options\": {\n \"include_usage\": false\n },\n \"tools\": [\n \"<unknown>\"\n ],\n \"tool_choice\": null,\n \"response_format\": {}\n}"
response = http.request(request)
puts response.read_body{
"id": "<string>",
"created": 123,
"model": "<string>",
"choices": [
{
"message": {
"content": "<string>",
"role": "assistant"
},
"finish_reason": "<string>",
"index": 0
}
],
"usage": {
"prompt_tokens": 123,
"completion_tokens": 123,
"total_tokens": 123,
"prompt_tokens_details": {
"cached_tokens": 123
}
},
"object": "chat.completion"
}{
"error": {
"message": "<string>",
"type": "<string>",
"param": "<string>",
"code": "<string>"
}
}"<string>"{
"error": {
"message": "<string>",
"type": "<string>",
"param": "<string>",
"code": "<string>"
}
}{
"error": {
"message": "<string>",
"type": "<string>",
"param": "<string>",
"code": "<string>"
}
}OpenAI-compatible chat completions
Creates a chat completion using the OpenAI wire format, proxying to the selected provider with credentials resolved on the server (secret store first, environment second) — callers never handle provider API keys. Model must be ’:’ for a built-in provider (one of anthropic, aws, azure_openai, cerebras, deepseek, fireworks, google, groq, moonshot, ollama, openai, perplexity, together, xai) or ‘custom::’ for a stored custom provider, e.g. ‘openai:gpt-4o’ or ‘anthropic:claude-sonnet-4-5’. Set stream: true for server-sent events of chat.completion.chunk payloads terminated by data: [DONE]. Tool calling is not supported.
Phoenix is not an AI gateway. The same server also takes on trace ingestion traffic, so routing production LLM calls through it competes with ingestion. Use this endpoint only to quickly try out different models in non-production environments.
curl --request POST \
--url https://api.example.com/v1/chat/completions \
--header 'Content-Type: application/json' \
--data '
{
"model": "<string>",
"messages": [
{
"content": "<string>"
}
],
"stream": false,
"temperature": 123,
"top_p": 123,
"max_tokens": 123,
"max_completion_tokens": 123,
"stop": "<string>",
"frequency_penalty": 123,
"presence_penalty": 123,
"seed": 123,
"n": 123,
"stream_options": {
"include_usage": false
},
"tools": [
"<unknown>"
],
"tool_choice": null,
"response_format": {}
}
'import requests
url = "https://api.example.com/v1/chat/completions"
payload = {
"model": "<string>",
"messages": [{ "content": "<string>" }],
"stream": False,
"temperature": 123,
"top_p": 123,
"max_tokens": 123,
"max_completion_tokens": 123,
"stop": "<string>",
"frequency_penalty": 123,
"presence_penalty": 123,
"seed": 123,
"n": 123,
"stream_options": { "include_usage": False },
"tools": ["<unknown>"],
"tool_choice": None,
"response_format": {}
}
headers = {"Content-Type": "application/json"}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
model: '<string>',
messages: [{content: '<string>'}],
stream: false,
temperature: 123,
top_p: 123,
max_tokens: 123,
max_completion_tokens: 123,
stop: '<string>',
frequency_penalty: 123,
presence_penalty: 123,
seed: 123,
n: 123,
stream_options: {include_usage: false},
tools: ['<unknown>'],
tool_choice: null,
response_format: {}
})
};
fetch('https://api.example.com/v1/chat/completions', 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.example.com/v1/chat/completions",
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' => '<string>',
'messages' => [
[
'content' => '<string>'
]
],
'stream' => false,
'temperature' => 123,
'top_p' => 123,
'max_tokens' => 123,
'max_completion_tokens' => 123,
'stop' => '<string>',
'frequency_penalty' => 123,
'presence_penalty' => 123,
'seed' => 123,
'n' => 123,
'stream_options' => [
'include_usage' => false
],
'tools' => [
'<unknown>'
],
'tool_choice' => null,
'response_format' => [
]
]),
CURLOPT_HTTPHEADER => [
"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.example.com/v1/chat/completions"
payload := strings.NewReader("{\n \"model\": \"<string>\",\n \"messages\": [\n {\n \"content\": \"<string>\"\n }\n ],\n \"stream\": false,\n \"temperature\": 123,\n \"top_p\": 123,\n \"max_tokens\": 123,\n \"max_completion_tokens\": 123,\n \"stop\": \"<string>\",\n \"frequency_penalty\": 123,\n \"presence_penalty\": 123,\n \"seed\": 123,\n \"n\": 123,\n \"stream_options\": {\n \"include_usage\": false\n },\n \"tools\": [\n \"<unknown>\"\n ],\n \"tool_choice\": null,\n \"response_format\": {}\n}")
req, _ := http.NewRequest("POST", url, payload)
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.example.com/v1/chat/completions")
.header("Content-Type", "application/json")
.body("{\n \"model\": \"<string>\",\n \"messages\": [\n {\n \"content\": \"<string>\"\n }\n ],\n \"stream\": false,\n \"temperature\": 123,\n \"top_p\": 123,\n \"max_tokens\": 123,\n \"max_completion_tokens\": 123,\n \"stop\": \"<string>\",\n \"frequency_penalty\": 123,\n \"presence_penalty\": 123,\n \"seed\": 123,\n \"n\": 123,\n \"stream_options\": {\n \"include_usage\": false\n },\n \"tools\": [\n \"<unknown>\"\n ],\n \"tool_choice\": null,\n \"response_format\": {}\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.example.com/v1/chat/completions")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"model\": \"<string>\",\n \"messages\": [\n {\n \"content\": \"<string>\"\n }\n ],\n \"stream\": false,\n \"temperature\": 123,\n \"top_p\": 123,\n \"max_tokens\": 123,\n \"max_completion_tokens\": 123,\n \"stop\": \"<string>\",\n \"frequency_penalty\": 123,\n \"presence_penalty\": 123,\n \"seed\": 123,\n \"n\": 123,\n \"stream_options\": {\n \"include_usage\": false\n },\n \"tools\": [\n \"<unknown>\"\n ],\n \"tool_choice\": null,\n \"response_format\": {}\n}"
response = http.request(request)
puts response.read_body{
"id": "<string>",
"created": 123,
"model": "<string>",
"choices": [
{
"message": {
"content": "<string>",
"role": "assistant"
},
"finish_reason": "<string>",
"index": 0
}
],
"usage": {
"prompt_tokens": 123,
"completion_tokens": 123,
"total_tokens": 123,
"prompt_tokens_details": {
"cached_tokens": 123
}
},
"object": "chat.completion"
}{
"error": {
"message": "<string>",
"type": "<string>",
"param": "<string>",
"code": "<string>"
}
}"<string>"{
"error": {
"message": "<string>",
"type": "<string>",
"param": "<string>",
"code": "<string>"
}
}{
"error": {
"message": "<string>",
"type": "<string>",
"param": "<string>",
"code": "<string>"
}
}Body
Model must be '{provider}:{model_name}' for a built-in provider (one of anthropic, aws, azure_openai, cerebras, deepseek, fireworks, google, groq, moonshot, ollama, openai, perplexity, together, xai) or 'custom:{provider_id}:{model_name}' for a stored custom provider, e.g. 'openai:gpt-4o' or 'anthropic:claude-sonnet-4-5'.
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