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GET
/
categories
Categories
curl --request GET \
  --url https://index.trygravity.ai/categories
import requests

url = "https://index.trygravity.ai/categories"

response = requests.get(url)

print(response.text)
const options = {method: 'GET'};

fetch('https://index.trygravity.ai/categories', 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://index.trygravity.ai/categories",
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://index.trygravity.ai/categories"

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://index.trygravity.ai/categories")
.asString();
require 'uri'
require 'net/http'

url = URI("https://index.trygravity.ai/categories")

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
{
  "categories": [
    {}
  ],
  "total": 123
}

Categories

The Index is organized into 22 categories spanning the modern developer stack — from AI/LLM infrastructure to payments, auth, observability, and everything in between. Call GET /categories to get a live count of services per category — or use the gravity_index_list_categories MCP tool.

Response

categories
array
name and service_count for every category, sorted alphabetically.
total
number
Total number of services in the Index.

Example

curl https://index.trygravity.ai/categories
{
  "categories": [
    { "name": "AI",              "service_count": 87 },
    { "name": "Analytics",       "service_count": 26 },
    { "name": "Auth",            "service_count": 23 },
    { "name": "Background Jobs", "service_count": 17 },
    { "name": "Cache",           "service_count": 8  },
    { "name": "CMS",             "service_count": 14 },
    { "name": "Commerce",        "service_count": 6  },
    { "name": "CRM",             "service_count": 10 },
    { "name": "Database",        "service_count": 53 },
    { "name": "Email",           "service_count": 23 },
    { "name": "Hosting",         "service_count": 25 },
    { "name": "Infrastructure",  "service_count": 53 },
    { "name": "Monitoring",      "service_count": 39 },
    { "name": "Payments",        "service_count": 25 },
    { "name": "Productivity",    "service_count": 29 },
    { "name": "Realtime",        "service_count": 13 },
    { "name": "Search",          "service_count": 8  },
    { "name": "SMS",             "service_count": 6  },
    { "name": "Storage",         "service_count": 13 },
    { "name": "Support",         "service_count": 7  },
    { "name": "Video",           "service_count": 4  },
    { "name": "Webhooks",        "service_count": 4  }
  ],
  "total": 493
}
Counts update whenever new services are added. The snapshot above reflects the initial public catalog (493 services, April 2026).

Categories at a glance

CategoryWhat’s in it
AILLM APIs, embeddings, vector DBs, agent frameworks, model hosting
AnalyticsProduct analytics, BI, attribution, feature flags
AuthIdentity providers, SSO, MFA, authorization engines
Background JobsQueue + scheduled-task platforms (BullMQ, Inngest, Trigger, …)
CacheManaged Redis / KV / edge caches
CMSHeadless CMS, MDX, content APIs
CommerceCheckout, subscriptions, marketplaces
CRMRevenue / customer data / outbound
DatabaseSQL, NoSQL, time-series, graph, vector DBs
EmailTransactional email, marketing, verification, receiving
HostingApp hosting, PaaS, serverless runtimes
InfrastructureIaC, secrets, CI/CD, SRE tooling
MonitoringError tracking, APM, logging, uptime
PaymentsProcessors, tax, fraud, payouts
ProductivityDocs, notes, meetings, automation
RealtimeWebSockets, presence, collaborative editing
SearchFull-text + vector search APIs
SMSSMS/MMS APIs, voice, number management
StorageObject storage, image/video CDNs, file uploads
SupportHelpdesk, chat, feedback portals
VideoVideo streaming, conferencing, recording
WebhooksWebhook relays, event gateways