Categories

Every category in the Gravity Index with live service counts

GET /categories

Categories

cURL

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

200

{
  "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

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
Email	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