AstroWay Astrology API (full catalogue)

Full Chart (computed)

astroway_ziwei_chart

Read-onlyIdempotent

Real star placement: soul and body palaces, the five-element class, all 14 main stars plus auxiliaries, the twelve stages, the 12 decade limits and the 四化 marked on the stars that carry them.

[Group: Zi Wei Dou Shu (Purple Star)] [Endpoint: POST /v1/ziwei/chart] [Required: date, time, gender] [Cost: 20 credits (Tier 2)]

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "date": "<date>",
      "time": "<time>",
      "gender": "<gender>"
    },
    "name": "astroway_ziwei_chart"
  }
}

Input Schema

Name	Required	Description
`age`	No
`date`	Yes
`time`	Yes
`fields`	No	Compact mode: comma-separated dotted paths to keep, relative to `data`, e.g. "planets.name,planets.longitude,houses.cusp". Omit for the whole response.
`gender`	Yes
`school`	No
`fixLeap`	No
`language`	No
`timezone`	No	IANA zone name such as Europe/Kyiv, or auto to look the zone up from latitude and longitude. The server takes the offset that zone kept at this local date and time, summer time included, and uses it in place of timezoneOffset. A clock time that happened twice takes the first occurrence; one skipped when clocks went forward takes the offset from before the change. Abbreviations such as EST are refused. Before 1970 the tz database is not reliable for every place, so send timezoneOffset when the local clock is known.
`dayDivide`	No
`longitude`	No
`precision`	No	Compact mode: round fractional numbers to this many decimals. Longitudes carry 14 by default; 2 is finer than any chart is drawn.
`yearDivide`	No
`tianmaSchool`	No
`trueSolarTime`	No
`timezoneOffset`	No	Ignored when timezone is sent.

Output Schema

Name	Required	Description	Default
`lunar`	No
`ziwei`	No
`palaces`	No
`computed`	No
`soulPalace`	No
`fiveElementClass`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed7 schema fields changedNov 7, 2026

removedOutput schema / properties / computed / anyOf

Removed value: -[
-  {
-    "type": "boolean"
-  },
-  {
-    "type": "null"
-  }
-]

addedOutput schema / properties / computed / type
```
Added value: +[
+  "boolean",
+  "null"
+]
```

changedOutput schema / properties / fiveElementClass / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "chinese": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "key": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "value": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "chinese": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "key": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "value": {
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / lunar / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "day": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "isLeapMonth": {
-        "anyOf": [
-          {
-            "type": "boolean"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "month": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "monthStart": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "day": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "isLeapMonth": {
+        "type": [
+          "boolean",
+          "null"
+        ]
+      },
+      "month": {
+        "type": [
+          "number",
+          "null"
+        ]
+      },
+      "monthStart": {
+        "type": [
+          "string",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / palaces / anyOf

Previous value: -[
-  {
-    "items": {
-      "anyOf": [
-        {
-          "additionalProperties": {},
-          "properties": {
-            "branch": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "decade": {
-              "anyOf": [
-                {
-                  "additionalProperties": {},
-                  "properties": {
-                    "fromAge": {
-                      "anyOf": [
-                        {
-                          "type": "number"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "index": {
-                      "anyOf": [
-                        {
-                          "type": "number"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "toAge": {
-                      "anyOf": [
-                        {
-                          "type": "number"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "lifeStage": {
-              "anyOf": [
-                {
-                  "additionalProperties": {},
-                  "properties": {
-                    "chinese": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "name": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "type": "object"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "majorStars": {
-              "anyOf": [
-                {
-                  "items": {
-                    "anyOf": [
-                      {
-                        "additionalProperties": {},
-                        "properties": {
-                          "chinese": {
-                            "anyOf": [
-                              {
-                                "type": "string"
-                              },
-                              {
-                                "type": "null"
-                              }
-                            ]
-                          },
-                          "name": {
-                            "anyOf": [
-                              {
-                                "type": "string"
-                              },
-                              {
-                                "type": "null"
-                              }
-                            ]
-                          }
-                        },
-                        "type": "object"
-                      },
-                      {
-                        "type": "null"
-                      }
-                    ]
-                  },
-                  "type": "array"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "palace": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "pillar": {
-              "anyOf": [
-                {
-                  "type": "string"
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            }
-          },
-          "type": "object"
-        },
-        {
-          "type": "null"
-        }
-      ]
-    },
-    "type": "array"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "items": {
+      "anyOf": [
+        {
+          "additionalProperties": {},
+          "properties": {
+            "branch": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "decade": {
+              "anyOf": [
+                {
+                  "additionalProperties": {},
+                  "properties": {
+                    "fromAge": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "index": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    },
+                    "toAge": {
+                      "type": [
+                        "number",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "lifeStage": {
+              "anyOf": [
+                {
+                  "additionalProperties": {},
+                  "properties": {
+                    "chinese": {
+                      "type": [
+                        "string",
+                        "null"
+                      ]
+                    },
+                    "name": {
+                      "type": [
+                        "string",
+                        "null"
+                      ]
+                    }
+                  },
+                  "type": "object"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "majorStars": {
+              "anyOf": [
+                {
+                  "items": {
+                    "anyOf": [
+                      {
+                        "additionalProperties": {},
+                        "properties": {
+                          "chinese": {
+                            "type": [
+                              "string",
+                              "null"
+                            ]
+                          },
+                          "name": {
+                            "type": [
+                              "string",
+                              "null"
+                            ]
+                          }
+                        },
+                        "type": "object"
+                      },
+                      {
+                        "type": "null"
+                      }
+                    ]
+                  },
+                  "type": "array"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "palace": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
+            "pillar": {
+              "type": [
+                "string",
+                "null"
+              ]
+            }
+          },
+          "type": "object"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "type": "array"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / soulPalace / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "branch": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "index": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "branch": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "index": {
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

changedOutput schema / properties / ziwei / anyOf

Previous value: -[
-  {
-    "additionalProperties": {},
-    "properties": {
-      "branch": {
-        "anyOf": [
-          {
-            "type": "string"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      },
-      "index": {
-        "anyOf": [
-          {
-            "type": "number"
-          },
-          {
-            "type": "null"
-          }
-        ]
-      }
-    },
-    "type": "object"
-  },
-  {
-    "type": "null"
-  }
-]New value: +[
+  {
+    "additionalProperties": {},
+    "properties": {
+      "branch": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "index": {
+        "type": [
+          "number",
+          "null"
+        ]
+      }
+    },
+    "type": "object"
+  },
+  {
+    "type": "null"
+  }
+]

Changed2 schema fields changedOct 13, 2026
- addedInput schema / properties / longitude
```
Added value: +{
+  "maximum": 180,
+  "minimum": -180,
+  "type": "number"
+}
```
- addedInput schema / properties / trueSolarTime
```
Added value: +{
+  "type": "boolean"
+}
```
First observedOct 5, 2026

TDQS

B3.2/5.0

Behavior4/5

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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower, and the description adds genuinely useful operational context beyond them: the POST endpoint, the mandatory date/time/gender inputs, and a 20-credit Tier 2 cost per call. 'Real star placement' also hints the values are computed rather than cached, though no caveats about computation determinism or latency are 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?

The single sentence front-loads the substantive content list with no filler, and the bracketed metadata block is compact and scannable. The dense enumeration of chart components is efficient, though it would read better split from the operational metadata.

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

Completeness3/5

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

Return values need not be explained since an output schema exists, and the safety/cost profile is covered, so the definition is callable. For a 16-parameter tool with a low schema coverage of 25%, however, the unexplained convention parameters (school, yearDivide, dayDivide) and the unresolved overlap with astroway_ziwei_full_chart leave real gaps an agent cannot fill from structured fields alone.

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

Parameters2/5

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

Schema description coverage is only 25% across 16 parameters, so the description must compensate and it does not — it only restates the three required fields already marked required in the schema. The five enum parameters (school, yearDivide, dayDivide, tianmaSchool, gender) and booleans (fixLeap, trueSolarTime) receive no explanation of their effect on the resulting chart, leaving an agent to guess which convention to pick.

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?

The description names a specific resource and enumerates its contents concretely (soul and body palaces, five-element class, 14 main stars plus auxiliaries, twelve stages, 12 decade limits, 四化 markings), so an agent knows exactly what data comes back. It does not, however, distinguish itself from the near-identical sibling astroway_ziwei_full_chart, which is the one sibling an agent most needs disambiguated.

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

Usage Guidelines2/5

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

There is no when-to-use guidance: nothing says whether to call this for a complete reading versus the cheaper per-palace or main-stars siblings, or when astroway_ziwei_full_chart should be preferred. The only routing information is the required-parameter and cost line, which is metadata rather than usage advice.

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

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