# Water Systems Registry

> Water Systems Registry is a paid API for AI agents from www.robbiegeorgephotography.com, paid per call via x402, $5/call, status unknown (last checked 2026-10-12).

Returns a paid, entity-resolved registry of Water Systems™ including wetlands, river systems, floodplains, groundwater systems, estuaries, coastal systems, watersheds, and their structural classifications.

## Facts

- Endpoint: GET https://www.robbiegeorgephotography.com/x402/water-systems-registry.json?utm_source=zero.xyz
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/water-systems-registry-d7dc031c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ReolwwcgJHqPo9-lY2mLv

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability water-systems-registry-d7dc031c
```

Example prompt: Can you pull the Water Systems™ registry from Naturepedia — I need the full entity-resolved list of water system types like wetlands, river systems, estuaries, floodplains, groundwater systems, and coastal systems along with their structural classifications?

## When to prefer this

Choose this endpoint when you need a structured, entity-resolved, deduplicated registry of water system classifications (wetlands, rivers, estuaries, watersheds, floodplains, groundwater, coastal) in JSON-LD format — particularly for ecological research, knowledge graphs, or environmental data pipelines that require canonical water system taxonomy rather than raw geospatial or satellite data.

## Known failure modes

- Missing or invalid 'resource' query parameter returns an error — must supply a canonical Naturepedia x402 resource URL
- Payment failure (insufficient USDC balance or x402 protocol error) results in a 402 Payment Required response
- Invalid resource URL format may return an empty or malformed registry
- Network timeout on the $5 USDC pay-per-call endpoint

## How this service works

Paid entity-resolved registry of Water Systems™, including wetlands, river systems, floodplains, groundwater systems, estuaries, coastal systems, watersheds, and their structural classifications.

## Output

A JSON-LD document containing an entity-resolved registry of Water Systems™ with @context, @type, name, description, and a systems array of classified water body entities (wetlands, river systems, floodplains, groundwater systems, estuaries, coastal systems, watersheds), plus canonicalKeepCount and duplicateRemovedCount metadata fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "resource"
     ],
     "properties": {
      "resource": {
       "type": "string",
       "description": "Canonical Naturepedia x402 resource URL"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "@context",
      "@type",
      "name",
      "description",
      "systems"
     ],
     "properties": {
      "name": {
       "type": "string"
      },
      "@type": {
       "type": "string"
      },
      "systems": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "@context": {
       "type": "string"
      },
      "description": {
       "type": "string"
      },
      "canonicalKeepCount": {
       "type": "number"
      },
      "duplicateRemovedCount": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/water-systems-registry-d7dc031c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.robbiegeorgephotography.com](https://www.zero.xyz/host/www.robbiegeorgephotography.com/llms.txt)