MCP serverAvailable tools
Search tax law
Find the articles of the official Mexican tax laws that mention given words, on a date.
MCP tool
search_tax_lawPurpose
- Use when
- You need the legal text that governs a tax question, with its citation.
- Do not use when
- You need an organization’s own data, or the values Exac calculates with; use get_tax_rules.
- Required permissions
- Side effects
- None
- Idempotency
- Idempotent
Input schema
JSON Schema{ "type": "object", "properties": { "query": { "type": "string", "minLength": 2, "maxLength": 300, "description": "Words the text must contain, in Spanish, as the law writes them (at most 16 words are used)" }, "law": { "description": "Search one law or regulation only; required when asOf is a past date", "allOf": [ { "enum": [ "LIVA", "LISR", "CFF", "LIEPS", "LSS", "LFT", "LDVUMA", "RLIVA", "RLISR", "RCFF", "RLIEPS", "RMF" ], "description": "A law, regulation or the RMF: LIVA, LISR, CFF, LIEPS, LSS, LFT, LDVUMA, RLIVA, RLISR, RCFF, RLIEPS, RMF" } ] }, "kind": { "description": "article: the numbered articles (RMF: its rules); transitory: the law’s own transitory provisions; decree: the transitory articles of each reform decree, laws and regulations only (where commencement dates are)", "allOf": [ { "enum": [ "article", "transitory", "decree" ] } ] }, "asOf": { "description": "The date whose text is wanted (YYYY-MM-DD, Mexico City); defaults to today. Past dates return the version that bound then, from the corpus's history", "allOf": [ { "type": "string", "format": "date", "pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))$" } ] }, "cursor": { "description": "nextCursor of the previous page", "allOf": [ { "type": "string", "minLength": 1 } ] }, "limit": { "description": "Results per page; defaults to 10", "allOf": [ { "type": "integer", "minimum": 1, "maximum": 25 } ] } }, "required": [ "query" ], "$schema": "http://json-schema.org/draft-07/schema#", "additionalProperties": false}Output schema
JSON Schema{ "type": "object", "properties": { "data": { "type": "object", "properties": { "results": { "type": "array", "items": { "type": "object", "properties": { "law": { "$ref": "#/definitions/__schema0" }, "article": { "type": "string" }, "headings": { "type": "array", "items": { "type": "string" } }, "validFrom": { "$ref": "#/definitions/__schema2" }, "validTo": { "anyOf": [ { "$ref": "#/definitions/__schema2" }, { "type": "null" } ] }, "citationUrl": { "type": "string" }, "snippet": { "type": "string" } }, "required": [ "law", "article", "headings", "validFrom", "validTo", "citationUrl", "snippet" ], "additionalProperties": false } }, "nextCursor": { "anyOf": [ { "type": "string" }, { "type": "null" } ] }, "mayBeTruncated": { "type": "boolean" }, "stale": { "type": "array", "items": { "type": "object", "properties": { "law": { "$ref": "#/definitions/__schema0" }, "kind": { "enum": [ "failing", "lagging" ] }, "since": { "type": "string", "format": "date-time" }, "note": { "allOf": [ { "type": "string" } ] } }, "required": [ "law", "kind", "since" ], "additionalProperties": false } }, "notice": { "type": "string" } }, "required": [ "results", "nextCursor", "mayBeTruncated", "stale", "notice" ], "additionalProperties": false }, "error": { "$schema": "http://json-schema.org/draft-07/schema#", "type": "object", "properties": { "code": { "enum": [ "validation_error", "unauthenticated", "forbidden", "payment_required", "not_found", "method_not_allowed", "conflict", "idempotency_conflict", "operation_in_progress", "recovery_required", "migration_required", "rate_limited", "provider_unavailable", "internal" ] }, "message": { "type": "string" }, "details": { "type": "object", "properties": { "document": { "type": "object", "properties": { "documentRef": { "type": "string", "pattern": "^(invoice|withholding|sales_receipt|declaration|tax_compliance_opinion|sales_receipt_refund):.+$" }, "editable": { "type": "boolean" } }, "required": [ "documentRef", "editable" ], "additionalProperties": false }, "issues": { "type": "array", "items": { "type": "object", "properties": { "path": { "type": "array", "items": { "anyOf": [ { "type": "string" }, { "type": "number" } ] } }, "message": { "type": "string" }, "code": { "type": "string" } }, "required": [ "path", "message" ], "additionalProperties": false } }, "retryable": { "type": "boolean" }, "retryAfterSeconds": { "type": "integer", "exclusiveMinimum": 0, "maximum": 9007199254740991 }, "reason": { "type": "string" }, "balanceMinor": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 }, "topUpUrl": { "type": "string" } }, "additionalProperties": false } }, "required": [ "code", "message" ], "additionalProperties": false } }, "$schema": "http://json-schema.org/draft-07/schema#", "additionalProperties": false, "definitions": { "__schema0": { "enum": [ "LIVA", "LISR", "CFF", "LIEPS", "LSS", "LFT", "LDVUMA", "RLIVA", "RLISR", "RCFF", "RLIEPS", "RMF" ] }, "__schema2": { "type": "string", "format": "date" } }, "oneOf": [ { "required": [ "data" ] }, { "required": [ "error" ] } ]}