Muslim Prayer Reminder MCP

Get Upcoming Prayer and Countdown

get_next_prayer

Read-onlyIdempotent

Returns the immediate next prayer name, scheduled time, authority calculation method, and remaining countdown in minutes. MANDATORY: The LLM must always explicitly disclose to the user which calculation authority method was used and why it was selected (see authorityNotice in response).

Input Schema

TableJSON Schema

Name	Required	Description
`city`	No	Supported cities: makkah, madinah, riyadh, cairo, gaza, jerusalem, alquds, ramallah, hebron, nablus, rafah, khanyunis, dubai, abudhabi, kuwait, doha, amman, istanbul, london, paris, newyork, toronto, jakarta, singapore, karachi, kualalumpur, tehran, sydney, tromso. Aliases: gazacity, nyc, kuwaitcity. Case, spaces and punctuation are ignored.
`madhab`	No	Optional Asr shadow jurisprudence override (Shafi or Hanafi)
`userId`	No	Nonblank user identifier; at most 256 UTF-8 bytes and 256 characters. Whitespace in nonblank identifiers is preserved.
`latitude`	No	Optional explicit latitude override
`timezone`	No	IANA timezone; required in the same request when latitude/longitude are supplied. Must agree with the city or be compatible with the coordinate timezone lookup.
`longitude`	No	Optional explicit longitude override
`calculationMethod`	No	Optional calculation authority override (auto-resolved from location by default)

Output Schema

TableJSON Schema

Name	Required	Description
`madhab`	Yes	Active Asr jurisprudence
`timezone`	Yes	Resolved IANA timezone
`nextPrayer`	Yes	Name of the upcoming prayer
`authorityNotice`	No
`nextPrayerAtUtc`	Yes	UTC timestamp of the upcoming prayer
`selectionReason`	No
`currentLocalDate`	Yes	Current local date YYYY-MM-DD
`remainingMinutes`	Yes	Minutes remaining until prayer start
`calculationMethod`	Yes	Active calculation authority
`minuteAdjustments`	No
`calculationDetails`	No
`nextPrayerLocalTime`	Yes	Formatted local time HH:mm
`authorityDescription`	No
`highLatitudeAdjustment`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed4 schema fields changedOct 9, 2026

addedInput schema / dependencies

Added value: +{
+  "latitude": [
+    "longitude",
+    "timezone"
+  ],
+  "longitude": [
+    "latitude",
+    "timezone"
+  ]
+}

removedInput schema / dependentRequired

Removed value: -{
-  "latitude": [
-    "longitude",
-    "timezone"
-  ],
-  "longitude": [
-    "latitude",
-    "timezone"
-  ]
-}

changed

Output schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneValidation / description

Previous value: -"Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure"New value: +"Validation basis; ocean locations require the matching nautical timezone or an adjacent coastal civil timezone; mathematical poles allow an explicit civil timezone with disclosure"

changedOutput schema / properties / calculationDetails / properties / timezoneValidation / description

Previous value: -"Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure"New value: +"Validation basis; ocean locations require the matching nautical timezone or an adjacent coastal civil timezone; mathematical poles allow an explicit civil timezone with disclosure"

Changed10 schema fields changedOct 3, 2026

addedInput schema / allOf

Added value: +[
+  {
+    "not": {
+      "required": [
+        "city",
+        "latitude"
+      ]
+    }
+  },
+  {
+    "not": {
+      "required": [
+        "city",
+        "longitude"
+      ]
+    }
+  }
+]

addedInput schema / dependentRequired

Added value: +{
+  "latitude": [
+    "longitude",
+    "timezone"
+  ],
+  "longitude": [
+    "latitude",
+    "timezone"
+  ]
+}

changedInput schema / properties / timezone / description

Previous value: -"IANA timezone; required in the same request when latitude/longitude are supplied. Explicit overrides select the display timezone."New value: +"IANA timezone; required in the same request when latitude/longitude are supplied. Must agree with the city or be compatible with the coordinate timezone lookup."

addedInput schema / properties / userId / pattern
```
Added value: +"\\S"
```

addedOutput schema / properties / authorityNotice / properties / calculationDetails / properties / expectedTimezone

Added value: +{
+  "description": "Timezone from city registry or approximate coordinate lookup",
+  "type": "string"
+}

changed

Output schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneSource / description

Previous value: -"Source of the display timezone; caller-selected overrides are not geographically validated."New value: +"Source of the validated timezone or disclosed ocean/pole choice"

addedOutput schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneValidation

Added value: +{
+  "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
+  "enum": [
+    "coordinate_lookup",
+    "nearby_boundary",
+    "city_registry",
+    "polar_choice",
+    "ocean_choice"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / calculationDetails / properties / expectedTimezone

Added value: +{
+  "description": "Timezone from city registry or approximate coordinate lookup",
+  "type": "string"
+}

changedOutput schema / properties / calculationDetails / properties / timezoneSource / description

Previous value: -"Source of the display timezone; caller-selected overrides are not geographically validated."New value: +"Source of the validated timezone or disclosed ocean/pole choice"

addedOutput schema / properties / calculationDetails / properties / timezoneValidation

Added value: +{
+  "description": "Validation basis; ocean and mathematical-pole locations retain caller-selected civil timezone with explicit disclosure",
+  "enum": [
+    "coordinate_lookup",
+    "nearby_boundary",
+    "city_registry",
+    "polar_choice",
+    "ocean_choice"
+  ],
+  "type": "string"
+}

Changed6 schema fields changedOct 3, 2026

changedInput schema / properties / city / description

Previous value: -"Supported predefined city. Supply city or coordinates with an IANA timezone; connector/IP geolocation is never used."New value: +"Supported cities: makkah, madinah, riyadh, cairo, gaza, jerusalem, alquds, ramallah, hebron, nablus, rafah, khanyunis, dubai, abudhabi, kuwait, doha, amman, istanbul, london, paris, newyork, toronto, jakarta, singapore, karachi, kualalumpur, tehran, sydney, tromso. Aliases: gazacity, nyc, kuwaitcity. Case, spaces and punctuation are ignored."

changedInput schema / properties / timezone / description

Previous value: -"Optional IANA timezone override"New value: +"IANA timezone; required in the same request when latitude/longitude are supplied. Explicit overrides select the display timezone."

changedInput schema / properties / userId / description

Previous value: -"Optional unique user identifier to load stored preferences. If omitted, pure geographic auto-resolution is applied."New value: +"Nonblank user identifier; at most 256 UTF-8 bytes and 256 characters. Whitespace in nonblank identifiers is preserved."

addedInput schema / properties / userId / maxLength
```
Added value: +256
```

addedOutput schema / properties / authorityNotice / properties / calculationDetails / properties / timezoneSource

Added value: +{
+  "description": "Source of the display timezone; caller-selected overrides are not geographically validated.",
+  "enum": [
+    "explicit_override",
+    "stored_preference",
+    "city_default",
+    "host_header"
+  ],
+  "type": "string"
+}

addedOutput schema / properties / calculationDetails / properties / timezoneSource

Added value: +{
+  "description": "Source of the display timezone; caller-selected overrides are not geographically validated.",
+  "enum": [
+    "explicit_override",
+    "stored_preference",
+    "city_default",
+    "host_header"
+  ],
+  "type": "string"
+}

Changed5 schema fields changedOct 2, 2026

addedInput schema / properties / city

Added value: +{
+  "description": "Supported predefined city. Supply city or coordinates with an IANA timezone; connector/IP geolocation is never used.",
+  "type": "string"
+}

addedOutput schema / properties / authorityNotice / properties / calculationDetails

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "appliedMinuteAdjustments": {
+      "additionalProperties": {
+        "type": "number"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "calendarAlignmentAdjusted": {
+      "type": "boolean"
+    },
+    "customMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "fallbackLocationUsed": {
+      "type": "boolean"
+    },
+    "highLatitudeRuleSource": {
+      "enum": [
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "locationBasis": {
+      "enum": [
+        "explicit_coordinates",
+        "explicit_city",
+        "stored_fixed_coordinates",
+        "stored_fixed_city",
+        "host_coordinates",
+        "host_city",
+        "network_geolocation",
+        "default_location"
+      ],
+      "type": "string"
+    },
+    "locationIsApproximate": {
+      "type": "boolean"
+    },
+    "madhabSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "methodMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "methodSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "regionalMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / authorityNotice / properties / highLatitudeAdjustment

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "adjustedPrayers": {
+      "items": {
+        "enum": [
+          "Fajr",
+          "Sunrise",
+          "Dhuhr",
+          "Asr",
+          "Maghrib",
+          "Isha"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "applied": {
+      "type": "boolean"
+    },
+    "astronomicalLatitudeClamped": {
+      "type": "boolean"
+    },
+    "effectiveLatitude": {
+      "anyOf": [
+        {
+          "const": 48,
+          "type": "number"
+        },
+        {
+          "const": -48,
+          "type": "number"
+        }
+      ],
+      "description": "Substitute latitude only; never the user coordinate"
+    },
+    "explanation": {
+      "type": "string"
+    },
+    "methodSpecificTwilightRule": {
+      "const": "MoonsightingCommittee",
+      "type": "string"
+    },
+    "rule": {
+      "enum": [
+        "MiddleOfTheNight",
+        "SeventhOfTheNight",
+        "TwilightAngle"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "applied",
+    "rule",
+    "astronomicalLatitudeClamped",
+    "adjustedPrayers",
+    "explanation"
+  ],
+  "type": "object"
+}

addedOutput schema / properties / calculationDetails

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "appliedMinuteAdjustments": {
+      "additionalProperties": {
+        "type": "number"
+      },
+      "propertyNames": {
+        "type": "string"
+      },
+      "type": "object"
+    },
+    "calendarAlignmentAdjusted": {
+      "type": "boolean"
+    },
+    "customMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "fallbackLocationUsed": {
+      "type": "boolean"
+    },
+    "highLatitudeRuleSource": {
+      "enum": [
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "locationBasis": {
+      "enum": [
+        "explicit_coordinates",
+        "explicit_city",
+        "stored_fixed_coordinates",
+        "stored_fixed_city",
+        "host_coordinates",
+        "host_city",
+        "network_geolocation",
+        "default_location"
+      ],
+      "type": "string"
+    },
+    "locationIsApproximate": {
+      "type": "boolean"
+    },
+    "madhabSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "methodMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    },
+    "methodSource": {
+      "enum": [
+        "explicit_override",
+        "stored_preference",
+        "geographic_default"
+      ],
+      "type": "string"
+    },
+    "regionalMinuteAdjustments": {
+      "additionalProperties": false,
+      "properties": {
+        "asr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "dhuhr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "fajr": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "isha": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "maghrib": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        },
+        "sunrise": {
+          "maximum": 60,
+          "minimum": -60,
+          "type": "integer"
+        }
+      },
+      "type": "object"
+    }
+  },
+  "type": "object"
+}

addedOutput schema / properties / highLatitudeAdjustment

Added value: +{
+  "additionalProperties": false,
+  "properties": {
+    "adjustedPrayers": {
+      "items": {
+        "enum": [
+          "Fajr",
+          "Sunrise",
+          "Dhuhr",
+          "Asr",
+          "Maghrib",
+          "Isha"
+        ],
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "applied": {
+      "type": "boolean"
+    },
+    "astronomicalLatitudeClamped": {
+      "type": "boolean"
+    },
+    "effectiveLatitude": {
+      "anyOf": [
+        {
+          "const": 48,
+          "type": "number"
+        },
+        {
+          "const": -48,
+          "type": "number"
+        }
+      ],
+      "description": "Substitute latitude only; never the user coordinate"
+    },
+    "explanation": {
+      "type": "string"
+    },
+    "methodSpecificTwilightRule": {
+      "const": "MoonsightingCommittee",
+      "type": "string"
+    },
+    "rule": {
+      "enum": [
+        "MiddleOfTheNight",
+        "SeventhOfTheNight",
+        "TwilightAngle"
+      ],
+      "type": "string"
+    }
+  },
+  "required": [
+    "applied",
+    "rule",
+    "astronomicalLatitudeClamped",
+    "adjustedPrayers",
+    "explanation"
+  ],
+  "type": "object"
+}

Changed1 schema field changedOct 1, 2026
- addedInput schema / properties / userId / minLength
```
Added value: +1
```

Changed1 schema field changedOct 1, 2026

addedInput schema / properties / userId

Added value: +{
+  "description": "Optional unique user identifier to load stored preferences. If omitted, pure geographic auto-resolution is applied.",
+  "type": "string"
+}

Changed3 schema fields changedSep 18, 2026

removedInput schema / properties / userId

Removed value: -{
-  "description": "Unique user or device ID",
-  "type": "string"
-}

removedOutput schema / properties / locationSource

Removed value: -{
-  "description": "Source of location resolution",
-  "type": "string"
-}

changedOutput schema / required

Previous value: -[
-  "currentLocalDate",
-  "timezone",
-  "nextPrayer",
-  "nextPrayerAtUtc",
-  "nextPrayerLocalTime",
-  "remainingMinutes",
-  "calculationMethod",
-  "madhab",
-  "locationSource"
-]New value: +[
+  "currentLocalDate",
+  "timezone",
+  "nextPrayer",
+  "nextPrayerAtUtc",
+  "nextPrayerLocalTime",
+  "remainingMinutes",
+  "calculationMethod",
+  "madhab"
+]

Changed3 schema fields changedSep 6, 2026
- removedInput schema / additionalProperties
```
Removed value: -false
```
- addedOutput schema / properties / remainingMinutes / maximum
```
Added value: +9007199254740991
```
- addedOutput schema / properties / remainingMinutes / minimum
```
Added value: +-9007199254740991
```
First observedSep 6, 2026

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