# Darkly Energized: List x402 Series Catalog

> Darkly Energized: List x402 Series Catalog is a paid API for AI agents from darklyenergized.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-29).

Returns the catalog of macroeconomic and central bank data series available via the Darkly Energized x402 API, with metadata like category, frequency, source, and data range.

## Facts

- Endpoint: GET https://darklyenergized.com/api/v1/x402/series?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/darkly-energized-list-x402-series-catalog-35c85973
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aB3XeaG2W1VuISq0b_yaz

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 darkly-energized-list-x402-series-catalog-35c85973
```

Example prompt: Show me all the macroeconomic series available on Darkly Energized — I want to see which central bank and FRED data series I can pull, maybe filter by the Central Bank category.

## When to prefer this

Use this endpoint first when building an integration with Darkly Energized to discover which series IDs and categories are available before querying specific data. Prefer this over direct series queries when you don't yet know the exact series ID, when you want to explore available data coverage by source or category, or when building a dynamic UI that lets users pick from available series.

## Known failure modes

- No series match the provided search/source/category filters — returns empty data array
- Invalid query parameter type — returns validation error
- Payment not included or insufficient — returns 402 Payment Required
- Service temporarily unavailable — returns 5xx error

## How this service works

Catalog of the macro liquidity series x402 serves (Fed net liquidity, global central bank balance sheets), with unit, source and update frequency ($0.01). Daily readings, not weekly: the Fed's weekly H.4.1 balance sheet is merged with the daily Treasury General Account and overnight reverse repo data, so the aggregate liquidity series update each business day instead of once a week.

## Output

An array of series objects, each containing the series ID, name, category, frequency (daily/weekly/monthly/continuous), source (e.g. FRED), and unit. Also includes metadata: total count, data date range (from/to), freshness info (last observation date, staleness flag, frequency), pagination cursor, and a response timestamp.

## 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",
     "properties": {
      "search": {
       "type": "string",
       "description": "Only series whose name or id contains this"
      },
      "source": {
       "type": "string",
       "description": "Only series from this source"
      },
      "category": {
       "type": "string",
       "description": "Only series in this category"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "data",
      "meta"
     ],
     "properties": {
      "data": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "id",
         "name",
         "category",
         "frequency",
         "source"
        ],
        "properties": {
         "id": {
          "type": "string",
          "example": "WALCL"
         },
         "name": {
          "type": "string",
          "example": "Federal Reserve Total Assets"
         },
         "unit": {
          "type": "string",
          "example": "USD"
         },
         "source": {
          "type": "string",
          "example": "FRED"
         },
         "category": {
          "type": "string",
          "example": "Central Bank"
         },
         "frequency": {
          "enum": [
           "daily",
           "weekly",
           "monthly",
           "continuous"
          ],
          "type": "string",
          "example": "weekly"
         }
        }
       }
      },
      "meta": {
       "type": "object",
       "required": [
        "timestamp"
       ],
       "properties": {
        "count": {
         "type": "integer"
        },
        "dataRange": {
         "type": "object",
         "properties": {
          "to": {
           "type": "string",
           "format": "date"
          },
          "from": {
           "type": "string",
           "format": "date"
          }
         }
        },
        "freshness": {
         "type
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/darkly-energized-list-x402-series-catalog-35c85973/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from darklyenergized.com](https://www.zero.xyz/host/darklyenergized.com/llms.txt)