{
  "meta": {
    "attribution": "Anchor Terminal (https://www.anchorterminal.com)",
    "docs": "https://www.anchorterminal.com/docs/",
    "generatedAt": "2026-10-05",
    "license": "CC-BY-4.0",
    "method": "https://www.anchorterminal.com/benchmark/",
    "methodology": "0.3",
    "openapi": "https://www.anchorterminal.com/openapi.json",
    "preview": false,
    "run": "2026-10-01",
    "runLabel": "October 2026 research run"
  },
  "tool": {
    "category": "",
    "endpoint": "https://spintax.net/mcp",
    "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/spintax-mcp.json",
    "kind": "mcp",
    "listed": "indexed",
    "liveUrl": "https://www.anchorterminal.com/api/v1/live/spintax-mcp.json",
    "markdownUrl": "https://www.anchorterminal.com/tools/spintax-mcp.md",
    "mcpTools": {
      "check": {
        "checker": "anchor-check/1.0",
        "totalTokens": 1627,
        "counts": {
          "error": 0,
          "note": 0,
          "warn": 1
        },
        "findings": [
          {
            "rule": "TC11",
            "severity": "warn",
            "tool": "analyze_spintax",
            "message": "1 parameter without a description: knownVariables",
            "fix": "Describe each one: format, units, an example, and what happens when it's left out."
          }
        ]
      },
      "checkedAt": "2026-10-04T22:25:35Z",
      "count": 4,
      "schemaTokens": 1627,
      "status": "ok",
      "tools": [
        {
          "name": "validate_spintax",
          "title": "Validate a spintax template",
          "description": "Static validation: returns diagnostics with severity, stable code, message and 1-based line/column. No \"error\"-severity diagnostic means the template is structurally sound — read the warnings before rendering, because some of them (plural.locale-missing) mean a block will not resolve. Pass knownVariables for names you will supply at render time to silence their variable.undefined warnings.",
          "inputSchema": {
            "additionalProperties": false,
            "properties": {
              "knownVariables": {
                "description": "Variable names the caller will supply at render time (case-insensitive).",
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "locale": {
                "description": "Locale for {plural …} arity, e.g. \"en\" (2-form), \"ru\" (3-form: ru/uk/be/sr/hr/bs) or \"ar\" (6-form). Omit for the 2-form default.",
                "type": "string"
              },
              "template": {
                "description": "Spintax template source (max 8192 characters). #include is disabled on this server.",
                "maxLength": 8192,
                "type": "string"
              }
            },
            "required": [
              "template"
            ],
            "type": "object"
          },
          "outputSchema": {
            "properties": {
              "diagnostics": {
                "items": {
                  "properties": {
                    "code": {
                      "description": "Stable machine code, e.g. plural.arity",
                      "type": "string"
                    },
                    "column": {
                      "description": "1-based",
                      "type": "integer"
                    },
                    "data": {
                      "type": "object"
                    },
                    "endColumn": {
                      "type": "integer"
                    },
                    "endLine": {
                      "type": "integer"
                    },
                    "line": {
                      "description": "1-based",
                      "type": "integer"
                    },
                    "message": {
                      "type": "string"
                    },
                    "severity": {
                      "enum": [
                        "error",
                        "warning"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "severity",
                    "code",
                    "message",
                    "line",
                    "column"
                  ],
                  "type": "object"
                },
                "type": "array"
              },
              "errorCount": {
                "type": "integer"
              },
              "valid": {
                "description": "True when no error-severity diagnostics.",
                "type": "boolean"
              },
              "warningCount": {
                "type": "integer"
              }
            },
            "required": [
              "valid",
              "errorCount",
              "warningCount",
              "diagnostics"
            ],
            "type": "object"
          },
          "annotations": {
            "idempotentHint": true,
            "openWorldHint": false,
            "readOnlyHint": true
          }
        },
        {
          "name": "render_spintax",
          "title": "Render spintax variants",
          "description": "Renders up to 20 variants. With a seed the output is deterministic (variant i uses seed \"\u003cseed\u003e#\u003ci\u003e\"); without one it is random. The engine is lenient: structural mistakes never throw, they surface in the output — run validate_spintax first.",
          "inputSchema": {
            "additionalProperties": false,
            "properties": {
              "context": {
                "additionalProperties": {
                  "type": "string"
                },
                "description": "Variable map, e.g. {\"CITY\": \"Prague\"}. Overrides #set/#def definitions.",
                "type": "object"
              },
              "count": {
                "default": 3,
                "description": "Number of variants (1–20).",
                "maximum": 20,
                "minimum": 1,
                "type": "integer"
              },
              "locale": {
                "description": "Locale for {plural …} arity, e.g. \"en\" (2-form), \"ru\" (3-form: ru/uk/be/sr/hr/bs) or \"ar\" (6-form). Omit for the 2-form default.",
                "type": "string"
              },
              "seed": {
                "description": "Deterministic RNG seed; omit for random output.",
                "type": [
                  "string",
                  "number"
                ]
              },
              "template": {
                "description": "Spintax template source (max 8192 characters). #include is disabled on this server.",
                "maxLength": 8192,
                "type": "string"
              }
            },
            "required": [
              "template"
            ],
            "type": "object"
          },
          "outputSchema": {
            "properties": {
              "variants": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              }
            },
            "required": [
              "variants"
            ],
            "type": "object"
          },
          "annotations": {
            "idempotentHint": false,
            "openWorldHint": false,
            "readOnlyHint": true
          }
        },
        {
          "name": "analyze_spintax",
          "title": "Analyze a spintax template",
          "description": "Reports what the template needs and contains: refs (variables referenced), sets (#set macros, re-picked per reference), defs (#def, rolled once per render), includes, diagnostics, and best-effort construct counts. Answers \"what variables must I supply\" — it is NOT a variant-cardinality counter.",
          "inputSchema": {
            "additionalProperties": false,
            "properties": {
              "knownVariables": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "locale": {
                "description": "Locale for {plural …} arity, e.g. \"en\" (2-form), \"ru\" (3-form: ru/uk/be/sr/hr/bs) or \"ar\" (6-form). Omit for the 2-form default.",
                "type": "string"
              },
              "template": {
                "description": "Spintax template source (max 8192 characters). #include is disabled on this server.",
                "maxLength": 8192,
                "type": "string"
              }
            },
            "required": [
              "template"
            ],
            "type": "object"
          },
          "outputSchema": {
            "properties": {
              "constructs": {
                "additionalProperties": {
                  "type": "integer"
                },
                "type": "object"
              },
              "defs": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "diagnostics": {
                "items": {
                  "properties": {
                    "code": {
                      "description": "Stable machine code, e.g. plural.arity",
                      "type": "string"
                    },
                    "column": {
                      "description": "1-based",
                      "type": "integer"
                    },
                    "data": {
                      "type": "object"
                    },
                    "endColumn": {
                      "type": "integer"
                    },
                    "endLine": {
                      "type": "integer"
                    },
                    "line": {
                      "description": "1-based",
                      "type": "integer"
                    },
                    "message": {
                      "type": "string"
                    },
                    "severity": {
                      "enum": [
                        "error",
                        "warning"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "severity",
                    "code",
                    "message",
                    "line",
                    "column"
                  ],
                  "type": "object"
                },
                "type": "array"
              },
              "includes": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "refs": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              },
              "sets": {
                "items": {
                  "type": "string"
                },
                "type": "array"
              }
            },
            "required": [
              "refs",
              "sets",
              "defs",
              "includes",
              "diagnostics",
              "constructs"
            ],
            "type": "object"
          },
          "annotations": {
            "idempotentHint": true,
            "openWorldHint": false,
            "readOnlyHint": true
          }
        },
        {
          "name": "spintax_authoring_guide",
          "title": "How to write a spintax template",
          "description": "Read this BEFORE writing or editing a spintax template — it is the canonical authoring guide the whole spintax toolchain is written against, not a tutorial. Pass the locale you will author in: for ru/uk/be and sr/hr/bs it carries the agreement and case rules that decide whether the variants read as human writing, which is the hard part and the part a valid template can still get wrong; for ar, the six plural forms and their order. Returns text to read, not a template.",
          "inputSchema": {
            "additionalProperties": false,
            "properties": {
              "locale": {
                "description": "Language you will author in, e.g. \"en\" or \"ru\". Selects the grammar rules and the worked examples. Omit for the language-neutral rules only.",
                "type": "string"
              },
              "variationLevel": {
                "description": "How much markup to use. Omit to decide for yourself — the guide then states no level.",
                "enum": [
                  "conservative",
                  "balanced",
                  "aggressive"
                ],
                "type": "string"
              }
            },
            "type": "object"
          },
          "outputSchema": {
            "properties": {
              "locale": {
                "type": "string"
              },
              "promptVersion": {
                "description": "Version of the rules TEXT (@spintax/authoring-prompt PROMPT_VERSION). Moves when the wording changes in a way that can change what a model writes.",
                "type": "string"
              },
              "rules": {
                "description": "The authoring rules, as text to read.",
                "type": "string"
              }
            },
            "required": [
              "rules",
              "promptVersion"
            ],
            "type": "object"
          },
          "annotations": {
            "idempotentHint": true,
            "openWorldHint": false,
            "readOnlyHint": true
          }
        }
      ]
    },
    "name": "spintax.net MCP server",
    "note": "Indexed from the official MCP registry: facts and our own checks, not reviewed, so no score, grade or rank.",
    "packages": [
      {
        "registryType": "npm",
        "identifier": "@spintax/mcp",
        "version": "0.4.1",
        "transport": "stdio"
      }
    ],
    "pageJsonUrl": "https://www.anchorterminal.com/tools/spintax-mcp.json",
    "popularity": {
      "npmWeekly": 43
    },
    "registryName": "net.spintax/mcp",
    "remotes": [
      {
        "type": "streamable-http",
        "url": "https://spintax.net/mcp"
      }
    ],
    "repository": "",
    "reviewed": false,
    "slug": "spintax-mcp",
    "source": "the official MCP registry",
    "sourceUrl": "https://registry.modelcontextprotocol.io/v0.1/servers?search=net.spintax/mcp",
    "summary": "Write, validate, render and analyze spintax templates. Backed by @spintax/core. No auth.",
    "updatedAt": "2026-10-03T10:48:33Z",
    "url": "https://www.anchorterminal.com/tools/spintax-mcp",
    "vendor": "spintax.net",
    "vendorUrl": "https://spintax.net/docs/",
    "version": "1.2.1",
    "websiteUrl": "https://spintax.net/docs/",
    "where": "both",
    "why": [
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}