{"openapi":"3.0.3","info":{"title":"Gnist Context — Unit Conversion","description":"Convert between units across 10 categories — length, mass, volume, area, speed, time, temperature, digital storage, energy, and pressure.\n\n- **MCP endpoint:** `https://context.gnist.ai/mcp/unit-conversion/`\n- **Toolkit page:** `/toolkits/unit-conversion`\n- **Full API spec:** `/api/openapi.json`\n- **Get an API key:** `/signup`","version":"1.0.0","contact":{"name":"GnistAI","url":"https://gnist.ai"}},"servers":[{"url":"https://context.gnist.ai","description":"Production"}],"paths":{"/rest/unit-conversion/convert_units":{"post":{"tags":["Utilities"],"summary":"convert_units","description":"Convert a value from one unit to another.\n\nSupports 10 categories: length, mass, volume, area, speed, time,\ntemperature, digital storage, energy, and pressure.\nUnits must be in the same category (e.g. both length units).\n\nExamples: kilometer→mile, pound→kilogram, fahrenheit→celsius,\ngigabyte→mebibyte, kilowatt_hour→btu, psi→bar.","operationId":"unit_conversion_convert_units","responses":{"200":{"description":"Successful tool call","content":{"application/json":{"schema":{"type":"object"}}}},"404":{"description":"Server or tool not found"},"500":{"description":"Tool execution error"}},"security":[{"ApiKeyHeader":[]},{"ApiKeyQuery":[]}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"additionalProperties":false,"properties":{"value":{"description":"The numeric value to convert.","type":"number"},"from_unit":{"description":"Source unit (e.g. 'kilometer', 'pound', 'fahrenheit').","type":"string"},"to_unit":{"description":"Target unit (e.g. 'mile', 'kilogram', 'celsius').","type":"string"}},"required":["value","from_unit","to_unit"],"type":"object"}}}}}},"/rest/unit-conversion/list_unit_categories":{"post":{"tags":["Utilities"],"summary":"list_unit_categories","description":"List all supported unit categories and their units.\n\nReturns every category (length, mass, volume, area, speed, time,\ntemperature, digital_storage, energy, pressure) with all available units.","operationId":"unit_conversion_list_unit_categories","responses":{"200":{"description":"Successful tool call","content":{"application/json":{"schema":{"type":"object"}}}},"404":{"description":"Server or tool not found"},"500":{"description":"Tool execution error"}},"security":[{"ApiKeyHeader":[]},{"ApiKeyQuery":[]}]}},"/rest/unit-conversion/list_units_in_category":{"post":{"tags":["Utilities"],"summary":"list_units_in_category","description":"List all available units in a specific category.","operationId":"unit_conversion_list_units_in_category","responses":{"200":{"description":"Successful tool call","content":{"application/json":{"schema":{"type":"object"}}}},"404":{"description":"Server or tool not found"},"500":{"description":"Tool execution error"}},"security":[{"ApiKeyHeader":[]},{"ApiKeyQuery":[]}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"additionalProperties":false,"properties":{"category":{"description":"Category name (e.g. 'length', 'mass', 'temperature').","type":"string"}},"required":["category"],"type":"object"}}}}}},"/rest/unit-conversion/report_feedback":{"post":{"tags":["Utilities"],"summary":"report_feedback","description":"Report a bug, feature request, or general feedback for this data source.\n\nUse this when something doesn't work as expected, when you'd like\na new feature, or when you have suggestions for improvement.\n\nArgs:\n    feedback: Describe the issue or suggestion.\n    feedback_type: One of 'bug', 'feature_request', or 'general'.","operationId":"unit_conversion_report_feedback","responses":{"200":{"description":"Successful tool call","content":{"application/json":{"schema":{"type":"object"}}}},"404":{"description":"Server or tool not found"},"500":{"description":"Tool execution error"}},"security":[{"ApiKeyHeader":[]},{"ApiKeyQuery":[]}],"requestBody":{"required":true,"content":{"application/json":{"schema":{"additionalProperties":false,"properties":{"feedback":{"type":"string"},"feedback_type":{"default":"general","type":"string"}},"required":["feedback"],"type":"object"}}}}}}},"tags":[{"name":"Utilities","description":"Data sources: Utilities"}],"components":{"securitySchemes":{"ApiKeyHeader":{"type":"apiKey","in":"header","name":"gnist-api-key","description":"API key passed via request header."},"ApiKeyQuery":{"type":"apiKey","in":"query","name":"gnist_api_key","description":"API key passed via query parameter."}}}}