Update wspr-mcp and pota-mcp docs — proxy fallback, nearby parks

wspr-mcp: document proxy grid fallback for sparse endpoints
pota-mcp: add pota_nearby_parks tool reference (7 tools now)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: KI7MT

docs/servers/pota.md

@@ -12,7 +12,7 @@ pip install pota-mcp
 
 ## Tools
 
-All 6 tools are **public** — no credentials needed.
+All 7 tools are **public** — no credentials needed.
 
 | Tool | Description |
 |------|-------------|
@@ -22,6 +22,7 @@ All 6 tools are **public** — no credentials needed.
 | `pota_user_stats` | Activator and hunter statistics |
 | `pota_scheduled` | Upcoming scheduled activations |
 | `pota_location_parks` | List all parks in a state/province/country |
+| `pota_nearby_parks` | Find parks near a point — great for 2-fer planning |
 
 ---
 
@@ -86,6 +87,20 @@ List all POTA parks in a state, province, or country.
 
 Returns list of parks with reference, name, coordinates, grid, type, and activation/contact counts.
 
+### pota_nearby_parks
+
+Find POTA parks near a geographic point. Useful for 2-fer activation planning.
+
+| Parameter | Type | Required | Description |
+|-----------|------|:--------:|-------------|
+| `location` | str | Yes | Location code to scope the search (e.g., "US-ID") |
+| `latitude` | float | Yes | Center point latitude (e.g., 43.617) |
+| `longitude` | float | Yes | Center point longitude (e.g., -115.993) |
+| `radius_km` | float | No | Search radius in km. Default: 50, max: 500 |
+| `limit` | int | No | Maximum parks to return. Default: 25, max: 100 |
+
+Returns parks within radius, sorted by distance, with `distance_km` field added to each park.
+
 ---
 
 ## No Credential Setup Needed

docs/servers/wspr.md

@@ -22,7 +22,7 @@ All 8 tools are **public** — no credentials needed.
 | `wspr_band_activity` | Per-band activity — spots, stations, distances, SNR |
 | `wspr_top_beacons` | Top transmitters ranked by spot count or distance |
 | `wspr_top_spotters` | Top receivers ranked by spot count or distance |
-| `wspr_propagation` | Propagation between two locations (callsign or grid) |
+| `wspr_propagation` | Propagation between two locations — proxy grid fallback for sparse endpoints |
 | `wspr_grid_activity` | All WSPR activity in/out of a Maidenhead grid square |
 | `wspr_longest_paths` | Longest distance paths in a time window |
 | `wspr_snr_trend` | Hourly SNR trend for a specific path over time |
@@ -80,6 +80,8 @@ Top WSPR receivers ranked by spot count or maximum distance.
 
 Propagation between two locations. Accepts callsigns, grid squares, or a mix. Searches both directions automatically.
 
+**Proxy grid fallback**: When an exact 4-char grid pair returns no results (e.g., DN13↔JD15 — no WSPR beacons on Bouvet), automatically widens to 2-char Maidenhead fields (DN↔JD) and retries. Proxy results are flagged with `proxy: true`.
+
 | Parameter | Type | Required | Description |
 |-----------|------|:--------:|-------------|
 | `tx` | str | Yes | First endpoint — callsign (e.g., KI7MT) or grid (e.g., DN13) |