> ## Documentation Index
> Fetch the complete documentation index at: https://nevermined.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# AI Services

> What's available in the Nevermined Catalog, and how to add your own AI service — validated healthy before it's listed.

Every entry in the Catalog is an external AI service that prices each request **on the wire**, so your agent can pay per call — no signup, no API key at the provider, no subscription. This page covers what's in the Catalog today and how to get your own service into it.

## What's available

Listings span a curated set of categories, each with granular sub-categories:

<CardGroup cols={2}>
  <Card title="Data & Enrichment" icon="database" />

  <Card title="Search & Research" icon="magnifying-glass" />

  <Card title="Crypto & Blockchain" icon="link" />

  <Card title="Finance & Markets" icon="chart-line" />

  <Card title="AI & Media" icon="wand-magic-sparkles" />

  <Card title="Web Scraping & Automation" icon="robot" />

  <Card title="Communication & Voice" icon="phone" />

  <Card title="…and more" icon="ellipsis" />
</CardGroup>

The full set also includes Sales & Business Intelligence, Social & Creator, Identity & Compliance, Infrastructure & Compute, Weather, and Travel. Browse or query the live set — the current categories and their counts come from the read API, never a hard-coded list. See [Discovering services](/docs/products/catalog/discover).

Each service settles on one of two payment rails the Router can pay:

| Protocol | What it is                                                                  | In the Catalog |
| -------- | --------------------------------------------------------------------------- | -------------- |
| **x402** | The service answers `HTTP 402` advertising an `accepts` array               | ✅ Listed       |
| **MPP**  | The service answers `HTTP 402` with a `WWW-Authenticate: Payment` challenge | ✅ Listed       |

### What gets listed

The Catalog only lists services the Router can actually pay — those that price each request on the wire (**x402** and **MPP**). Services that authenticate with a long-lived API key and bill you monthly aren't listed: there's no per-call price on the wire for the Router to settle. The Catalog surfaces only what an autonomous agent can buy, so it's never handed a service it can't pay for.

## Add your AI Service

The Catalog is also where you list a service **you** own so other buyers' agents discover and pay for it. From an organization in the [Nevermined app](https://nevermined.app), publish one of your registered agents into the Catalog with a category, its callable endpoint, and presentation details (title, description, logo, tags, features).

You supply only presentation and the endpoint. Trust-sensitive facts are derived server-side rather than accepted from you — the payment **protocol** and **price** are detected from your endpoint, and ownership is taken from the agent — so a listing can't misrepresent what it charges or who runs it.

### Listed only once it's validated healthy

Before your service goes live, a monitor **probes the endpoint to confirm it actually responds** — a listing is never published on your word alone. It also keeps checking after launch, so the Catalog stays a directory of services that currently work, not ones that used to.

Each listing moves through a simple lifecycle:

| State             | Meaning                                                                                                                                                                       |
| ----------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Validating**    | The monitor is checking that your endpoint responds before it goes live.                                                                                                      |
| **Live**          | Healthy and listed in the public Catalog, discoverable by buyers.                                                                                                             |
| **Action needed** | The monitor never got a healthy response within 24h, so the agent stays unlisted.                                                                                             |
| **Degraded**      | Still listed, but failing health checks. If no healthy probe arrives within 72h the listing is **unlisted automatically** — any healthy probe inside that window restores it. |
| **Removed**       | The listing has been taken down.                                                                                                                                              |

<Note>
  Publishing requires an **organization**. See [Agentic integration](/docs/solutions/organizations/agentic-integration) for the organization API context, and [Register a plan and agent](/docs/agents-guide/register-plan-and-agent) for creating the agent you'll list.
</Note>

## Next

<CardGroup cols={2}>
  <Card title="Discovering services" icon="magnifying-glass" href="/docs/products/catalog/discover">
    Browse the app and query the public read API to find what you need.
  </Card>

  <Card title="Router quickstart" icon="rocket" href="/docs/products/catalog/router/quickstart">
    From an API key to a paid call against a service you found here, in five steps.
  </Card>
</CardGroup>


## Related topics

- [Discovering services](/docs/products/catalog/discover.md)
- [Catalog Overview](/docs/products/catalog/overview.md)
- [Manage Payment Plans](/docs/products/nevermined-app/manage-plans.md)
- [MCP](/docs/integrations/mcp.md)
- [Add Payments to Your Agent](/docs/agents-guide/add-payments.md)