Use this as the first step when you have a company name (English
or Korean) but not the six-digit KRX ticker. Pass the resulting
ticker to ``get_recent_filings`` (paid) or ``get_disclosure_summary``
(paid, when you also have a specific receipt number).

Args:
    query: Company name (English or Korean) or six-digit ticker.
        Examples: "Samsung Electronics", "삼성전자", "005930".
    limit: Max matches to return (1-50, default 20).

Returns:
    A list of company dicts with ``ticker``, ``corp_code``,
    ``name_kr``, ``name_en``, and ``market`` (KOSPI / KOSDAQ).
    Empty list when nothing matches; never raises on no-results.

Returns metadata only — no AI summaries — so an agent can decide
which filings warrant a paid call. Each entry includes ``rcpt_no``
(for ``get_disclosure_summary``) and ``ticker`` (for
``get_recent_filings``).

Args:
    limit: Max filings to return (1-100, default 20).
    since_hours: Look back this many hours (1-168, default 24).

Returns:
    A list of filing-metadata dicts.

**This tool spends real USDC from the configured wallet** — 0.005
USDC × ``limit`` per call (default 0.025 USDC). The wallet pays
only on a successful 200 response; 4xx/5xx failures do not settle.

If you only have a company name, call ``find_company`` first to
resolve the ticker.

Args:
    ticker: Six-digit KRX ticker, e.g. "005930" for Samsung Electronics.
    limit: Max filings to fetch (1-50, default 5). Each costs 0.005 USDC.

Returns:
    A dict with ``ticker``, ``count``, ``summaries`` (each summary
    carries the same shape as ``get_disclosure_summary``), and a
    ``payment`` block with the on-chain settlement tx hash.

Raises:
    RuntimeError: on payment rejection or API failure.

**This tool spends real USDC from the configured wallet** — 0.005
USDC per call as of v0.1, settled on-chain via x402. The wallet
pays only on a successful 200 response; 4xx/5xx failures do not
settle.

Args:
    rcpt_no: 14-digit DART receipt number, e.g. ``"20260424900874"``.
        You can discover receipt numbers from the DART portal at
        https://dart.fss.or.kr/ or from koreafilings.com's listing
        endpoints as they come online.

Returns:
    A dict with the summary content (``summary_en``), operational
    metadata (``importance_score`` 1–10, ``event_type``,
    ``ticker_tags``, ``sector_tags``, ``actionable_for``,
    ``generated_at``), and payment proof (``paid_tx``, ``network``,
    ``payer``). If the server served from its free-tier path the
    payment block is absent.

Raises:
    RuntimeError: when the SDK rejects the request. The message
        distinguishes payment failures (facilitator rejection,
        network mismatch, insufficient balance) from other API
        errors (404 unknown rcpt_no, 429 rate limit, 5xx upstream).