Return NDS database metadata: data versions, nuclide counts, DB file hash.

Catalog installed libraries and query entrypoints (what exists, where to query, and which tools to use).

Inspect SQLite schema for an installed NDS database library (tables/columns/foreign keys, optional indexes).

Safe structured query builder over SQLite tables (filter/sort/paginate; no raw SQL input).

List embedded upstream ENDF-6 zip archive metadata for FENDL/IRDFF (never returns BLOB payloads).

Check npm registry for newer nds-mcp version. Does not perform updates.

Find nuclides by element symbol, Z (atomic number), and/or A (mass number). Returns basic properties from NUBASE2020.

Get atomic mass data for a nuclide (Z, A) from AME2020: mass excess, binding energy/A, beta-decay energy, atomic mass.

Get nucleon separation energies from AME2020: Sn, Sp, S2n, S2p.

Get Q-values from AME2020: Qα, Q(2β⁻), Q(εp), Q(β⁻n), Q(4β⁻), Q(d,α), Q(p,α), Q(n,α).

Get decay information from NUBASE2020: half-life, spin/parity, decay modes with branching ratios, isomers.

Get nuclear charge radius (rms) with source-aware comparison across IAEA, laser spectroscopy, and CODATA (when available). mode=best|all|compare controls recommendation vs full source list.

Search nuclides by property range (half_life_seconds, mass_excess_keV). Returns ground-state nuclides matching criteria.

Query nuclear energy levels from ENSDF and TUNL. Returns level energies, spin-parity, half-lives. For A ≤ 20, automatically includes TUNL resonance data (widths, isospin, decay modes, table_label for TUNL publication provenance). Each result has a "source" field ("ENSDF" or "TUNL").

Query gamma-ray transitions from ENSDF. Returns energies, intensities, multipolarities, conversion coefficients for a nuclide.

Query beta/EC decay feeding patterns from ENSDF. Returns branching ratios, log(ft) values, endpoint energies for parent nuclide decays.

Look up ENSDF/NSR bibliographic references by keynumber or mass number.

Get decay radiation spectra from JENDL-5 Decay (gamma/beta/alpha/X-ray discrete lines and continuous-spectrum summaries).

List available JENDL-5 XS targets (A/state) for a given Z and projectile.

Return available JENDL-5 reaction channels for a target: mt, reaction, e_min_eV, e_max_eV, n_points.

Get JENDL-5 pointwise cross-section tables. mode=raw returns tabulated points; mode=sampled interpolates onto a log grid with ENDF-6 NBT/INT rules.

Interpolate JENDL-5 cross section at a specific energy using ENDF-6 NBT/INT segmented interpolation rules.

Search EXFOR experimental reaction data points by target/projectile/reaction/quantity (including MACS).

Get one EXFOR entry (all subentries + points) by entry number.

Get one CODATA fundamental constant by name (case-insensitive by default).

List CODATA fundamental constants with optional keyword filtering and pagination.