# Elements Live – Research Topic History (RIS/HRI)

> Elements Live – Research Topic History (RIS/HRI) is a paid API for AI agents from www.elements-live.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).

Returns yearly or monthly Research Intensity Score (RIS) and Hype-Relative Intensity (HRI) history for a keyword or sector research topic.

## Facts

- Endpoint: GET https://www.elements-live.com/v1/subjects/:subject_type/:subject_id/history?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/elements-live-research-topic-history-ris-hri-e55f9b04
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TOrbYo6ekjXpNYJ22iNjF

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 elements-live-research-topic-history-ris-hri-e55f9b04
```

Example prompt: Can you pull up the yearly RIS and HRI history on Elements Live for the keyword topic with ID 'graphene-001' so I can see how research interest has trended over time?

## When to prefer this

Use this endpoint when you need historical time-series data (yearly or monthly) for RIS/HRI metrics on a specific research topic. Choose this over the current-snapshot endpoint when trend analysis, momentum tracking, or longitudinal comparison is needed. Use it after resolving a free-text topic to a subject_id via the search endpoint.

## Known failure modes

- Invalid subject_type enum value (not 'keyword' or 'sector') returns a 400 error
- Unknown or invalid subject_id returns a 404 not found
- Payment failure or missing x402 payment header returns a 402 Payment Required
- No history available for a newly indexed subject may return an empty array
- Rate limiting may return a 429 response

## How this service works

Yearly or monthly RIS/HRI history for one research topic.

## Output

Returns a time series of RIS (Research Intensity Score) and HRI (Hype-Relative Intensity) values indexed by year or month for the specified research topic. Enables trend analysis and comparison of research momentum over time.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "subject_type",
      "subject_id"
     ],
     "properties": {
      "subject_id": {
       "type": "string",
       "description": "From /v1/subjects/search"
      },
      "subject_type": {
       "enum": [
        "keyword",
        "sector"
       ],
       "type": "string"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "entity",
      "resolution",
      "labels",
      "metrics",
      "notes",
      "canonical_url"
     ],
     "properties": {
      "notes": {
       "type": "object"
      },
      "entity": {
       "type": "object",
       "required": [
        "type",
        "id",
        "name"
       ],
       "properties": {
        "id": {
         "type": "string"
        },
        "name": {
         "type": "string"
        },
        "type": {
         "type": "string"
        }
       }
      },
      "labels": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "metrics": {
       "type": "object",
       "required": [
        "ris",
        "hri"
       ],
       "properties": {
        "hri": {
         "type": "array"
        },
        "ris": {
         "type": "array"
        }
       }
      },
      "resolution": {
       "type": "string"
      },
      "canonical_url": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/elements-live-research-topic-history-ris-hri-e55f9b04/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.elements-live.com](https://www.zero.xyz/host/www.elements-live.com/llms.txt)