# Elements Live – Chemical Elements by Research Topic

> Elements Live – Chemical Elements by Research Topic is a paid API for AI agents from www.elements-live.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-11).

Returns the chemical elements most associated with a given research topic (keyword or sector), ranked by research intensity signals.

## Facts

- Endpoint: GET https://www.elements-live.com/v1/subjects/:subject_type/:subject_id/elements?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/elements-live-chemical-elements-by-research-topic-d8d7aa99
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f02t6aYjXZx2d05PcZi7N

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-chemical-elements-by-research-topic-d8d7aa99
```

Example prompt: Which chemical elements are most associated with battery research on Elements Live? Use the keyword subject type and find the subject ID for 'battery' first, then pull its top elements.

## When to prefer this

Use this endpoint when you need to understand which chemical elements are driving research activity within a specific topic or sector — ideal for materials science intelligence, R&D prioritization, competitive analysis, or investment research. Prefer over generic search when you need element-level specificity tied to research intensity signals rather than simple keyword co-occurrence.

## Known failure modes

- Invalid subject_type enum value (must be 'keyword' or 'sector') returns a 400 error
- Unknown or unresolvable subject_id returns a 404 or empty result — use the /v1/subjects/search endpoint first to resolve a valid ID
- Missing required path parameters (subject_type or subject_id) cause a 400 bad request
- Payment not processed (x402 protocol) results in a 402 Payment Required response before any data is returned

## How this service works

The chemical elements most associated with one research topic.

## Output

A ranked list of chemical elements most associated with the specified research topic (keyword or sector), reflecting their relative research intensity linkage to that subject.

## 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": [
      "subject_type",
      "subject_id",
      "elements"
     ],
     "properties": {
      "elements": {
       "type": "array",
       "items": {
        "type": "object",
        "required": [
         "symbol",
         "name",
         "ris_in_element",
         "hri_in_element",
         "fold_target",
         "canonical_url"
        ],
        "properties": {
         "name": {
          "type": "string"
         },
         "symbol": {
          "type": "string"
         },
         "fold_target": {
          "type": "boolean"
         },
         "canonical_url": {
          "type": "string"
         }
        }
       }
      },
      "subject_id": {
       "type": "string"
      },
      "subject_type": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/elements-live-chemical-elements-by-research-topic-d8d7aa99/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)