Get the host-compat catalog

The versioned host-compatibility catalog backing mcpjam compat verdicts. Public and unauthenticated: static host facts and creation config with no project or user scope. Always returns a catalog — source is live when the backend publish was reachable and bundled when serving the SDK’s built-in fallback.

GET /host-catalog

Get the host-compat catalog

cURL

curl --request GET \
  --url https://app.mcpjam.com/api/v1/host-catalog

import requests

url = "https://app.mcpjam.com/api/v1/host-catalog"

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://app.mcpjam.com/api/v1/host-catalog', 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://app.mcpjam.com/api/v1/host-catalog",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($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://app.mcpjam.com/api/v1/host-catalog"

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

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

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

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://app.mcpjam.com/api/v1/host-catalog")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.mcpjam.com/api/v1/host-catalog")

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

request = Net::HTTP::Get.new(url)

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

200

{
  "schemaVersion": 123,
  "version": 123,
  "contentHash": "<string>",
  "publishedAt": 123,
  "catalog": {
    "hostsById": {}
  }
}

Response

200 - application/json

The latest catalog envelope.

schemaVersion · integer · required

Catalog document schema version (currently 2).

version · integer · required

Monotonic backend publish version; 0 when source is bundled.

contentHash · string · required

SHA-256 of the canonical catalog JSON; empty when source is bundled.

publishedAt · integer · required

Publish time (ms epoch); 0 when source is bundled.

source · enum<string> · required

Whether this envelope came from the backend publish or the SDK's bundled fallback.

Available options: live, bundled

catalog · object · required

Show child attributes