Categories
curl --request GET \
--url https://index.trygravity.ai/categoriesimport 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
}Explore
Categories
Every category in the Gravity Index with live service counts
GET
/
categories
Categories
curl --request GET \
--url https://index.trygravity.ai/categoriesimport 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
}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.
Authentication
Send your publisher key as theX-API-Key header or as a platform_api_key query parameter. One of
the two is required; requests without a valid key are rejected with 403.
string
Publisher API key. Alternative to the
platform_api_key query parameter.string
Publisher API key. Alternative to the
X-API-Key header.Response
array
name and service_count for every category, sorted alphabetically.number
Total number of services in the Index.
Example
curl -H "X-API-Key: $GRAVITY_PUBLISHER_KEY" 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
| Category | What’s in it |
|---|---|
| AI | LLM APIs, embeddings, vector DBs, agent frameworks, model hosting |
| Analytics | Product analytics, BI, attribution, feature flags |
| Auth | Identity providers, SSO, MFA, authorization engines |
| Background Jobs | Queue + scheduled-task platforms (BullMQ, Inngest, Trigger, …) |
| Cache | Managed Redis / KV / edge caches |
| CMS | Headless CMS, MDX, content APIs |
| Commerce | Checkout, subscriptions, marketplaces |
| CRM | Revenue / customer data / outbound |
| Database | SQL, NoSQL, time-series, graph, vector DBs |
| Transactional email, marketing, verification, receiving | |
| Hosting | App hosting, PaaS, serverless runtimes |
| Infrastructure | IaC, secrets, CI/CD, SRE tooling |
| Monitoring | Error tracking, APM, logging, uptime |
| Payments | Processors, tax, fraud, payouts |
| Productivity | Docs, notes, meetings, automation |
| Realtime | WebSockets, presence, collaborative editing |
| Search | Full-text + vector search APIs |
| SMS | SMS/MMS APIs, voice, number management |
| Storage | Object storage, image/video CDNs, file uploads |
| Support | Helpdesk, chat, feedback portals |
| Video | Video streaming, conferencing, recording |
| Webhooks | Webhook relays, event gateways |

