{ "openapi": "3.1.1", "info": { "title": "Companion Planting Checker API", "version": "1.0.0", "summary": "Check which of your plants go well together, which to keep apart, and why.", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://greenplotcompanioncheck.usefulweb.site" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Check which of your plants go well together, which to keep apart, and why.", "description": "Checks every pair in a list of up to 40 vegetables, herbs, fruit and flowers for companions and antagonists. Each pair says why — a plain reason such as shared blight or shade, or gardening tradition with weak evidence — and same-family neighbours that share soil pests are listed too.\n\nMethodology:\n- The pair table is our own compilation: Hearth’s twelve traditional pairs plus about sixty more for Greenplot’s library of vegetables, herbs, fruit and flowers. Every pair is either good (grow together) or bad (keep apart).\n- Each pair carries its reason and an evidence label. “Practical” means a plain mechanism: the same disease (late blight on potatoes and tomatoes, verticillium wilt on potatoes and raspberries), shade or competition, a quick crop that is cleared before its neighbour needs the space, pollinators, support for climbers. “Tradition” means gardening lore with weak or no trial evidence; it is shown, never promised.\n- Every pair inside your list is looked up once. The score adds 1 per practical good pair and 0.5 per traditional one, and subtracts the same for bad pairs; the verdict is “conflicts” when any practical bad pair is present.\n- Same-family neighbours are listed for the families that share soil pests and diseases (potato family, cabbage family, onion family, carrot family, legumes, cucurbits): they are fine together in one season but should move on together in the rotation.\n\nCompanion planting is mostly tradition. Spacing, light, water and rotation matter far more than neighbours.", "tags": [ "apps" ], "x-mcp-tool": "greenplot_companion_check", "x-owner-app": "greenplot", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/GreenplotCompanionCheckInput" }, "examples": { "example1": { "summary": "Tomato bed with potatoes nearby", "value": { "plants": [ "tomato", "basil", "potato", "carrot", "onion", "bush-bean" ] } }, "example2": { "summary": "Three sisters with sunflowers", "value": { "plants": [ "sweetcorn", "pole-bean", "squash", "sunflower", "nasturtium" ] } }, "example3": { "summary": "Herb spiral", "value": { "plants": [ "rosemary", "sage", "thyme", "lavender", "mint", "parsley", "chives" ] } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/GreenplotCompanionCheckResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "GreenplotCompanionCheckInput": { "type": "object", "additionalProperties": false, "properties": { "plants": { "title": "Plants", "type": "array", "items": { "type": "string", "enum": [ "tomato", "pepper", "eggplant", "potato", "cucumber", "zucchini", "squash", "melon", "sweetcorn", "bush-bean", "pole-bean", "pea", "broad-bean", "lettuce", "spinach", "chard", "beet", "carrot", "parsnip", "radish", "turnip", "onion", "spring-onion", "garlic", "leek", "cabbage", "broccoli", "cauliflower", "kale", "brussels-sprouts", "kohlrabi", "pak-choi", "rocket", "celery", "fennel", "parsley", "basil", "dill", "coriander", "chives", "asparagus", "rhubarb", "artichoke", "jerusalem-artichoke", "sweet-potato", "okra", "celeriac", "swede", "endive", "chicory", "mizuna", "corn-salad", "shallot", "chilli", "mangetout", "chinese-cabbage", "horseradish", "cress", "mustard-greens", "soybean", "tomatillo", "watermelon", "rosemary", "thyme", "sage", "oregano", "mint", "lavender", "tarragon", "lemon-balm", "lovage", "sorrel", "bay", "marjoram", "chamomile", "borage", "chervil", "summer-savory", "strawberry", "raspberry", "autumn-raspberry", "blackberry", "blueberry", "gooseberry", "redcurrant", "blackcurrant", "apple", "pear", "plum", "cherry", "peach", "apricot", "quince", "fig", "grape", "kiwi", "physalis", "sunflower", "french-marigold", "calendula", "nasturtium", "sweet-pea", "cosmos", "zinnia", "cornflower", "poppy", "nigella", "phacelia", "crimson-clover", "dahlia", "tulip", "daffodil", "snapdragon", "alyssum", "larkspur", "gladiolus", "echinacea", "rudbeckia", "lupin", "hollyhock", "verbena", "sweet-william" ] }, "default": [ "tomato", "basil", "potato", "carrot", "onion", "bush-bean" ] } }, "required": [] }, "GreenplotCompanionCheckResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "plants", "good", "bad", "sameFamily", "neutralPairs", "score", "verdict", "perPlant" ], "properties": { "plants": { "type": "array", "items": { "type": "string" } }, "good": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "a", "b", "kind", "evidence", "note" ], "properties": { "a": { "type": "string" }, "b": { "type": "string" }, "kind": { "enum": [ "good", "bad" ] }, "evidence": { "enum": [ "practical", "tradition" ] }, "note": { "type": "string" } } } }, "bad": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "a", "b", "kind", "evidence", "note" ], "properties": { "a": { "type": "string" }, "b": { "type": "string" }, "kind": { "enum": [ "good", "bad" ] }, "evidence": { "enum": [ "practical", "tradition" ] }, "note": { "type": "string" } } } }, "sameFamily": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "family", "plants" ], "properties": { "family": { "type": "string" }, "plants": { "type": "array", "items": { "type": "string" } } } } }, "neutralPairs": { "type": "integer" }, "score": { "type": "number" }, "verdict": { "enum": [ "conflicts", "tradition-conflicts", "good", "neutral" ] }, "perPlant": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "plant", "family", "group", "goodOutside" ], "properties": { "plant": { "type": "string" }, "family": { "type": "string" }, "group": { "type": "string" }, "goodOutside": { "type": "array", "items": { "type": "string" } } } } } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }