Get server capabilities - Baseten

GET

/

v1

/

loops

/

capabilities

cURL

curl --request GET \
--url https://api.baseten.co/v1/loops/capabilities \
--header "Authorization: Bearer $BASETEN_API_KEY"

import requests
import os
API_KEY = os.environ.get("BASETEN_API_KEY", "<YOUR_API_KEY>")
url = "https://api.baseten.co/v1/loops/capabilities"

headers = {"Authorization": f"Bearer {API_KEY}"}

response = requests.request(
    "GET",
    url,
    headers=headers,
    params={'model': 'Qwen/Qwen3-8B', 'use_case': 'rl', 'max_seq_len': 32768}
)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.baseten.co/v1/loops/capabilities', 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.baseten.co/v1/loops/capabilities",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.baseten.co/v1/loops/capabilities"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://api.baseten.co/v1/loops/capabilities")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "supported_models": [
    {
      "model_name": "<string>",
      "max_seq_len": 123,
      "max_context_length": 123,
      "supports_vision_language": true,
      "max_enabled_seq_len": 0,
      "enabled": true,
      "enablement_details": {
        "reason": "needs_approval",
        "reason_detail": "<string>",
        "remediation": "<string>"
      }
    }
  ]
}

Authorizations

Authorization

string

header

required

Send Authorization: Bearer <api_key>. The legacy Authorization: Api-Key <api_key> scheme is also accepted.

Query Parameters

model

string | null

Restrict the response to one model, identified by its HuggingFace repo id. A supported model comes back with its 'enabled' flag and, when false, its 'enablement_details'. An empty list means Baseten does not support that model. Omit to list every supported model.

Example:

"Qwen/Qwen3-8B"

use_case

enum<string>

default:rl

What the caller intends to run. Defaults to 'rl', the stricter of the two: an RL run needs both a trainer and a sampler, so anything enabled for 'rl' is also enabled for 'sft'. What the caller intends to run.

Reinforcement learning runs a trainer and a sampler; supervised fine-tuning runs a trainer alone. A model can therefore be enabled for one and not the other, and the same model can support a longer sequence length for SFT than for RL.

Available options:

rl,

sft

Example:

"rl"

max_seq_len

integer | null

The sequence length the caller intends to train at — the same value they would pass as 'max_seq_len' when creating the run. Models that cannot serve it are reported as not enabled rather than returned with a ceiling the caller cannot use. Omit for the model's highest enabled sequence length.

Required range: x >= 1

Example:

32768

Response

200 - application/json

Response for GET /v1/loops/capabilities.

A model Baseten does not support has no entry at all, so an empty list for a single-model request means exactly that.

supported_models

SupportedModelV1 · object[]

required

Models Baseten supports for this use case, each carrying an 'enabled' flag saying whether this workspace can run it now, and 'enablement_details' when it cannot. Filter on 'enabled' to get the models you can use.

Show child attributes

⌘I

cURL

curl --request GET \
--url https://api.baseten.co/v1/loops/capabilities \
--header "Authorization: Bearer $BASETEN_API_KEY"

import requests
import os
API_KEY = os.environ.get("BASETEN_API_KEY", "<YOUR_API_KEY>")
url = "https://api.baseten.co/v1/loops/capabilities"

headers = {"Authorization": f"Bearer {API_KEY}"}

response = requests.request(
    "GET",
    url,
    headers=headers,
    params={'model': 'Qwen/Qwen3-8B', 'use_case': 'rl', 'max_seq_len': 32768}
)

print(response.text)

const options = {method: 'GET', headers: {Authorization: 'Bearer <token>'}};

fetch('https://api.baseten.co/v1/loops/capabilities', 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.baseten.co/v1/loops/capabilities",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>"
  ],
]);

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

curl_close($curl);

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

package main

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

func main() {

	url := "https://api.baseten.co/v1/loops/capabilities"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("Authorization", "Bearer <token>")

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

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

	fmt.Println(string(body))

}

require 'uri'
require 'net/http'

url = URI("https://api.baseten.co/v1/loops/capabilities")

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

request = Net::HTTP::Get.new(url)
request["Authorization"] = 'Bearer <token>'

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

{
  "supported_models": [
    {
      "model_name": "<string>",
      "max_seq_len": 123,
      "max_context_length": 123,
      "supports_vision_language": true,
      "max_enabled_seq_len": 0,
      "enabled": true,
      "enablement_details": {
        "reason": "needs_approval",
        "reason_detail": "<string>",
        "remediation": "<string>"
      }
    }
  ]
}