# DeepSearch Theme Evidence – Korean Listed Companies by Investment Theme

> DeepSearch Theme Evidence – Korean Listed Companies by Investment Theme is a paid API for AI agents from x402.deepsearch.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-12).

Returns Korean KRX-listed companies linked to a given investment theme (e.g. HBM, 유리기판, 원전, robotics) with evidence graded as confirmed/circumstantial/expectation, including DART filing snippets, earnings headlines, regional revenue data, and price context.

## Facts

- Endpoint: GET https://x402.deepsearch.com/v1/context/theme-evidence?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/deepsearch-theme-evidence-korean-listed-companies-by-investment-theme-794daf29
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0yFTUXRIaTSK6JlrBerP9

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 deepsearch-theme-evidence-korean-listed-companies-by-investment-theme-794daf29
```

Example prompt: Which Korean listed companies are actually tied to the HBM theme — show me up to 10, graded by whether they have confirmed DART filing evidence, circumstantial links, or just market expectation hype.

## When to prefer this

Choose this endpoint when you need to evaluate Korean KRX-listed stocks by their actual, evidenced connection to a specific investment theme — particularly when distinguishing confirmed DART-filing revenue from speculative thematic association. Prefer this over generic stock screeners or news endpoints when thematic evidence grading and regulatory filing snippets are needed. Ideal for investment research workflows focused on Korean equity markets and named investment themes like HBM, 유리기판, 원전, or robotics.

## Known failure modes

- Unknown or misspelled theme keyword returns empty company array
- Limit parameter outside 1-15 range may be clamped or rejected
- Theme with no DART filing evidence returns companies with only expectation-grade entries
- Non-Korean themes may have limited or no KRX company matches
- Network or payment (x402) failure returns no data

## How this service works

For an investment theme (e.g. HBM, 유리기판, 원전, robotics), the Korean listed companies linked to it with evidence graded confirmed / circumstantial / expectation: DART filing snippets with receipt numbers, regional revenue, earnings and order headlines, and price context since the signal. Separates real revenue from theme hype.

## Output

A JSON response containing the queried theme name and an array of matched KRX-listed companies, each with: company code and name, an evidence grade (confirmed/circumstantial/expectation in Korean: 확인/정황/기대), DART regulatory filing snippets with receipt numbers, earnings and order-related headlines, and price context since the theme signal emerged. This separates companies with real revenue from those only speculatively associated with the theme.

## 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": [
      "theme"
     ],
     "properties": {
      "limit": {
       "type": "string",
       "description": "Max companies, 1-15 (default 8)"
      },
      "theme": {
       "type": "string",
       "description": "Theme or keyword, Korean or English (e.g. HBM, 유리기판, 원전)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "theme": "HBM",
   "companies": [
    {
     "code": "000660",
     "name": "SK하이닉스",
     "grade": "확인",
     "filing_snippets": [
      {
       "text": "…",
       "rcept_no": "2026…"
      }
     ],
     "earnings_headlines": [
      "…"
     ]
    }
   ]
  },
  "packType": "theme-evidence"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/deepsearch-theme-evidence-korean-listed-companies-by-investment-theme-794daf29/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.deepsearch.com](https://www.zero.xyz/host/x402.deepsearch.com/llms.txt)