Resolve a DOI, URL, or title query into a normalized paper candidate.

Fetch one paper as structured article, Markdown, and/or metadata with provenance, quality, trace, and token estimates. Defaults are modes=article+markdown, provider-default assets, metadata-only fallback enabled, include_refs=null, max_tokens=full_text, prefer_cache=false, no_download=false, artifact_mode=markdown-assets and save_markdown=false. The call may access remote services and write provider artifacts, assets, and an MCP cache sidecar. no_download=true suppresses those writes; save_markdown=true is an explicit separate write and returns a path instead of inline full text. artifact_mode=none suppresses provider artifacts but retains MCP cache semantics. asset_profile=none|body|all controls local assets; body/all may return bounded ImageContent. Use prefer_cache=true only with matching request semantics. Current provider/source/runtime/asset-default facts are at resource://paper-fetch/provider-catalog. Access controls and manual-auth boundaries are never bypassed.

List DOI-proven cached downloads from the current cache index without touching the network or scanning loose files.

Look up DOI-proven cached files within one download_dir without touching the network. detail=compact returns preferred entries plus request-sensitive acceptance/asset summaries; preferred_only omits non-preferred entry arrays.

Resolve multiple DOI, URL, or title queries with shared transport reuse and optional cross-host concurrency.

Fetch 1..50 papers with bounded concurrency and input-ordered compact manifest/acceptance results. It may access remote services and write the same cache, artifacts, or Markdown as fetch_paper. detail=bounded returns only a batch-wide bounded text sample. batch_results atomically writes the final input-ordered JSONL result; overwrite defaults false. Browser routes automatically prepare/update managed Camoufox before browser launch.

Probe one or more papers using cheap metadata and landing-page signals, with optional cross-host concurrency. mode defaults to metadata and accepts only metadata; article mode and the standalone has_fulltext tool are removed. Read probe_state, evidence, and errors from input-ordered results (results[0] for one query). Never fetches full bodies or writes downloads. Use batch_fetch for real fetching and judge results by acceptance.

Live-check the shared browser HTML path for one provider or all browser providers. This prepares managed Camoufox before launch, opens publisher pages, and may update filtered storage-state; it never runs PDF fallback or automatic authentication.

Inspect filtered static provider configuration and local dependency readiness. This never opens Camoufox or publisher pages; use browser_preflight for live health.