Western Astrology MCP Server by RoxyAPI

Calculate planetary transits - Current transits with natal chart comparison

post_astrology_transits

Read-only

Calculate current or future planetary transits (positions of all bodies now). Optionally compare transits to natal chart to find transit-to-natal aspects. Returns all 14 celestial bodies (the 10 classical planets, the lunar nodes, Chiron, and Black Moon Lilith) with signs, degrees, and speeds. When natal chart provided, includes transit aspects (transiting Sun conjunct natal Mars, etc.) with orbs and applying/separating status. Perfect for daily transit forecasts, aspect alerts, and personalized transit reports.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`date`	No	Transit date in YYYY-MM-DD format (defaults to current date)
`lang`	No	Response language (BCP 47). Supported: en, tr, de, es, hi, pt, fr, ru, zh-Hans, zh-Hant. Defaults to en. Coverage varies by domain, and a field with no translation in the requested language returns English.	en
`time`	No	Transit time in HH:MM:SS format (defaults to current time)
`compact`	No	Set true for the same data in a compact shape: arrays of same-shaped objects arrive columnar as {"__cols":[names],"__rows":[[values]]}. Lossless, typically 40 to 52 percent fewer tokens.
`nodeType`	No	Lunar node convention. "mean" is the smoothed average node, which always moves retrograde; "true" is the osculating node, which tracks the real perturbed node, oscillates up to about 1.5 degrees either side of the mean on a 173-day cycle, and can briefly turn direct. Neither is more correct and they almost always fall in the same sign. Applies to the North and South Node. True is the osculating node and the default, because it is what most Western chart software reports; mean is the smoothed node preferred by several evolutionary schools, so pass "mean" to match one. Nothing else in the chart changes, and the two agree on the sign except when the node sits within about 1.8 degrees of a cusp. Defaults to "true".	true
`timezone`	No	Transit timezone: decimal hours from UTC OR IANA name (e.g. "America/New_York"). IANA resolved to the DST-correct offset for the transit date. Defaults to 0 (UTC).
`natalChart`	No	Optional natal chart data to compare transits against

Output Schema

TableJSON Schema

Name	Required	Description	Default
`summary`	No
`timezone`	Yes
`transitDate`	Yes
`transitTime`	Yes
`transitAspects`	No
`transitPlanets`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 4, 2026
- changedInput schema / properties / natalChart / properties / timezone / example
```
Previous value: --5New value: +"America/New_York"
```

Changed1 schema field changedSep 30, 2026

changedInput schema / properties / natalChart / properties / date / description

Previous value: -"Date in YYYY-MM-DD format. A single-digit month or day is accepted and zero-padded (2026-3-5 becomes 2026-03-05). Impossible calendar dates are rejected. Calculations that read planetary positions support 1550-01-01 to 2650-01-25; outside that span they answer 400 with code date_out_of_range."New value: +"Date in YYYY-MM-DD format. A single-digit month or day is accepted and zero-padded (2026-3-5 becomes 2026-03-05). Impossible calendar dates are rejected. Calculations that read planetary positions support 1550-01-02 to 2650-01-22; outside that span they answer 400 with code date_out_of_range, and a calculation that reads a window around the date (a sunrise search, a run of days) may answer the same 400 for a date within a few days of either end."

Changed1 schema field changedSep 29, 2026

changedInput schema / properties / natalChart / properties / date / description

Previous value: -"Date in YYYY-MM-DD format. A single-digit month or day is accepted and zero-padded (2026-3-5 becomes 2026-03-05). Impossible calendar dates are rejected."New value: +"Date in YYYY-MM-DD format. A single-digit month or day is accepted and zero-padded (2026-3-5 becomes 2026-03-05). Impossible calendar dates are rejected. Calculations that read planetary positions support 1550-01-01 to 2650-01-25; outside that span they answer 400 with code date_out_of_range."

Changed1 schema field changedSep 20, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "properties": {
+    "summary": {
+      "properties": {
+        "challenging": {
+          "type": "number"
+        },
+        "harmonious": {
+          "type": "number"
+        },
+        "neutral": {
+          "type": "number"
+        },
+        "totalAspects": {
+          "type": "number"
+        }
+      },
+      "required": [
+        "totalAspects",
+        "harmonious",
+        "challenging",
+        "neutral"
+      ],
+      "type": "object"
+    },
+    "timezone": {
+      "type": "number"
+    },
+    "transitAspects": {
+      "items": {
+        "properties": {
+          "angle": {
+            "type": "number"
+          },
+          "interpretation": {
+            "properties": {
+              "guidance": {
+                "type": "string"
+              },
+              "impact": {
+                "type": "string"
+              },
+              "keywords": {
+                "items": {
+                  "type": "string"
+                },
+                "type": "array"
+              },
+              "summary": {
+                "type": "string"
+              },
+              "timing": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "summary",
+              "timing",
+              "impact",
+              "guidance",
+              "keywords"
+            ],
+            "type": "object"
+          },
+          "isApplying": {
+            "type": "boolean"
+          },
+          "natalPlanet": {
+            "type": "string"
+          },
+          "natalPlanetLocalized": {
+            "type": "string"
+          },
+          "nature": {
+            "type": "string"
+          },
+          "orb": {
+            "type": "number"
+          },
+          "strength": {
+            "type": "number"
+          },
+          "transitPlanet": {
+            "type": "string"
+          },
+          "transitPlanetLocalized": {
+            "type": "string"
+          },
+          "type": {
+            "type": "string"
+          },
+          "typeLocalized": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "transitPlanet",
+          "natalPlanet",
+          "type",
+          "angle",
+          "orb",
+          "isApplying",
+          "strength",
+          "nature",
+          "interpretation"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "transitDate": {
+      "type": "string"
+    },
+    "transitPlanets": {
+      "items": {
+        "properties": {
+          "degree": {
+            "type": "number"
+          },
+          "isRetrograde": {
+            "type": "boolean"
+          },
+          "latitude": {
+            "type": "number"
+          },
+          "longitude": {
+            "type": "number"
+          },
+          "name": {
+            "type": "string"
+          },
+          "nameLocalized": {
+            "type": "string"
+          },
+          "sign": {
+            "type": "string"
+          },
+          "signLocalized": {
+            "type": "string"
+          },
+          "speed": {
+            "type": "number"
+          }
+        },
+        "required": [
+          "name",
+          "longitude",
+          "latitude",
+          "sign",
+          "degree",
+          "speed",
+          "isRetrograde"
+        ],
+        "type": "object"
+      },
+      "type": "array"
+    },
+    "transitTime": {
+      "type": "string"
+    }
+  },
+  "required": [
+    "transitDate",
+    "transitTime",
+    "timezone",
+    "transitPlanets"
+  ],
+  "type": "object"
+}

Changed2 schema fields changedAug 25, 2026

changedInput schema / properties / lang / description

Previous value: -"Response language (ISO 639-1). Supported: en, tr, de, es, hi, pt, fr, ru. Defaults to en. Languages without translations yet return English."New value: +"Response language (BCP 47). Supported: en, tr, de, es, hi, pt, fr, ru, zh-Hans, zh-Hant. Defaults to en. Coverage varies by domain, and a field with no translation in the requested language returns English."

changedInput schema / properties / lang / enum

Previous value: -[
-  "en",
-  "tr",
-  "de",
-  "es",
-  "hi",
-  "pt",
-  "fr",
-  "ru"
-]New value: +[
+  "en",
+  "tr",
+  "de",
+  "es",
+  "hi",
+  "pt",
+  "fr",
+  "ru",
+  "zh-Hans",
+  "zh-Hant"
+]

Changed3 schema fields changedAug 17, 2026

addedInput schema / examples
```
Added value: +[
+  {}
+]
```

changedInput schema / properties / compact / description

Previous value: -"Set true to receive the exact same data in a token-optimized shape that is cheaper for you to read: whitespace is stripped and every array of same-shaped objects is encoded columnar as {\"__cols\":[field names],\"__rows\":[[values]]}, so each field name is sent once instead of once per row. Fully lossless (no field or value is dropped or changed) and typically 40 to 52 percent fewer tokens on large results. Prefer true whenever token or inference cost matters. Default false returns standard indented JSON."New value: +"Set true for the same data in a compact shape: arrays of same-shaped objects arrive columnar as {\"__cols\":[names],\"__rows\":[[values]]}. Lossless, typically 40 to 52 percent fewer tokens."

changedInput schema / properties / nodeType / description

Previous value: -"Lunar node convention. \"mean\" is the smoothed average node, which always moves retrograde; \"true\" is the osculating node, which tracks the real perturbed node, oscillates up to about 1.5 degrees either side of the mean on a 173-day cycle, and can briefly turn direct. Neither is more correct and they almost always fall in the same sign. Applies to the North and South Node. True is what most Western software reports (Astrolabe, Cafe Astrology, TimePassages), which is why it is the default here; astro-seek and the Steven Forrest evolutionary school use mean, so pass \"mean\" to match those. Nothing else in the chart changes, and the two agree on the sign except when the node sits within about 1.8 degrees of a cusp. Defaults to \"true\"."New value: +"Lunar node convention. \"mean\" is the smoothed average node, which always moves retrograde; \"true\" is the osculating node, which tracks the real perturbed node, oscillates up to about 1.5 degrees either side of the mean on a 173-day cycle, and can briefly turn direct. Neither is more correct and they almost always fall in the same sign. Applies to the North and South Node. True is the osculating node and the default, because it is what most Western chart software reports; mean is the smoothed node preferred by several evolutionary schools, so pass \"mean\" to match one. Nothing else in the chart changes, and the two agree on the sign except when the node sits within about 1.8 degrees of a cusp. Defaults to \"true\"."

Changed1 schema field changedAug 10, 2026

addedInput schema / properties / nodeType

Added value: +{
+  "default": "true",
+  "description": "Lunar node convention. \"mean\" is the smoothed average node, which always moves retrograde; \"true\" is the osculating node, which tracks the real perturbed node, oscillates up to about 1.5 degrees either side of the mean on a 173-day cycle, and can briefly turn direct. Neither is more correct and they almost always fall in the same sign. Applies to the North and South Node. True is what most Western software reports (Astrolabe, Cafe Astrology, TimePassages), which is why it is the default here; astro-seek and the Steven Forrest evolutionary school use mean, so pass \"mean\" to match those. Nothing else in the chart changes, and the two agree on the sign except when the node sits within about 1.8 degrees of a cusp. Defaults to \"true\".",
+  "enum": [
+    "mean",
+    "true"
+  ],
+  "example": "true",
+  "type": "string"
+}

Changed2 schema fields changedAug 2, 2026

addedInput schema / properties / natalChart / properties / latitude / description

Added value: +"Natal birth latitude in decimal degrees, positive north. Sets the local sidereal time behind the natal Ascendant and house cusps that the transits are measured against."

addedInput schema / properties / natalChart / properties / longitude / description

Added value: +"Natal birth longitude in decimal degrees, positive east and negative west. Example: New York -74.0060, London -0.1276, Sydney 151.2093."

Changed1 schema field changedJul 22, 2026

changedInput schema / properties / compact / description

Previous value: -"Return the same data in a token-optimized compact shape (minified, with same-shaped arrays encoded columnar) to reduce LLM token cost. Lossless: no fields are dropped. Default false."New value: +"Set true to receive the exact same data in a token-optimized shape that is cheaper for you to read: whitespace is stripped and every array of same-shaped objects is encoded columnar as {\"__cols\":[field names],\"__rows\":[[values]]}, so each field name is sent once instead of once per row. Fully lossless (no field or value is dropped or changed) and typically 40 to 52 percent fewer tokens on large results. Prefer true whenever token or inference cost matters. Default false returns standard indented JSON."

Changed1 schema field changedJul 22, 2026

addedInput schema / properties / compact

Added value: +{
+  "default": false,
+  "description": "Return the same data in a token-optimized compact shape (minified, with same-shaped arrays encoded columnar) to reduce LLM token cost. Lossless: no fields are dropped. Default false.",
+  "type": "boolean"
+}

Changed2 schema fields changedJul 12, 2026

changedInput schema / properties / natalChart / properties / timezone / anyOf

Previous value: -[
-  {
-    "maximum": 14,
-    "minimum": -14,
-    "type": "number"
-  },
-  {
-    "pattern": "^[A-Za-z_]+(?:\\/[A-Za-z0-9_+-]+){0,2}$",
-    "type": "string"
-  }
-]New value: +[
+  {
+    "maximum": 14,
+    "minimum": -14,
+    "type": "number"
+  },
+  {
+    "type": "string"
+  }
+]

changedInput schema / properties / timezone / anyOf

Previous value: -[
-  {
-    "maximum": 14,
-    "minimum": -14,
-    "type": "number"
-  },
-  {
-    "pattern": "^[A-Za-z_]+(?:\\/[A-Za-z0-9_+-]+){0,2}$",
-    "type": "string"
-  }
-]New value: +[
+  {
+    "maximum": 14,
+    "minimum": -14,
+    "type": "number"
+  },
+  {
+    "type": "string"
+  }
+]

First observedJul 8, 2026

TDQS

A3.5/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered by structured data. The description adds conditional behavior ('when natal chart provided, includes transit aspects with orbs and applying/separating status') and the body set returned, but since an output schema exists these return details are partly redundant and no auth/rate-limit context is given.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Four sentences, front-loaded with the core verb+resource, then output contents, then the conditional natal-chart behavior, then use cases. Mostly earns its place, though the enumeration of the 14 celestial bodies is slightly verbose given the output schema already lists them.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given read-only annotations plus a full output schema and 100% schema coverage, the description is complete enough to invoke correctly: it clarifies scope (all bodies), the optional natal comparison, and the aspect output. Only the sibling differentiation is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% (date, time, timezone, lang, nodeType, compact, natalChart all documented in-schema), so the baseline is 3. The description adds no further parameter meaning, wording, or format details beyond what the schema already provides.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb+resource ('Calculate current or future planetary transits') and names the optional natal-chart comparison, so the agent knows exactly what the tool produces. However, it does not distinguish itself from close siblings like post_astrology_transit_aspects (aspect-only) or post_astrology_transits_monthly (date-range variant), which is the main ambiguity it leaves.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It offers scenario hints ('Perfect for daily transit forecasts, aspect alerts, and personalized transit reports'), which imply when the tool is useful, but gives no explicit when-to-use vs alternatives guidance and no exclusions against the many transit/aspect siblings. Usage is implied rather than directed.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

All Western Astrology MCP Server by RoxyAPI tools Inspect

Try in Browser

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Glama MCP Gateway

Add one secure layer between your agents and this server.

Resources

Need Help?