> ## Documentation Index > Fetch the complete documentation index at: https://docs.usecroma.com/llms.txt > Use this file to discover all available pages before exploring further. # SCJN Tesis > Retrieve one tesis by its registro digital (`registration_number`), including the full text, citation (clave, época, localización), subjects, precedent notes, and linked ruling ids. ## OpenAPI ````yaml /api-reference/openapi.json post /mx/scjn/tesis/v1 openapi: 3.1.0 info: title: Croma Marketplace API version: 1.0.0 description: >- Government-data APIs for Colombia, Peru, Mexico, and global web search. Croma normalizes public-sector data into structured JSON for product teams and AI agents. servers: - url: https://api.croma.run security: [] paths: /mx/scjn/tesis/v1: post: tags: - Mexico - SCJN summary: SCJN Tesis description: >- Retrieve one tesis by its registro digital (`registration_number`), including the full text, citation (clave, época, localización), subjects, precedent notes, and linked ruling ids. operationId: scjn_tesis requestBody: required: true content: application/json: schema: type: object required: - registration_number properties: registration_number: type: string pattern: ^\d{4,10}$ description: >- Registro digital of the tesis (`registration_number` from search). additionalProperties: false example: registration_number: '2001360' responses: '200': description: Successful response headers: X-Request-Id: description: >- Unique id for the request (req_…). Include it in support reports. schema: type: string X-RateLimit-Limit: description: Requests allowed in the current window. schema: type: integer X-RateLimit-Remaining: description: Requests left before you are throttled. schema: type: integer X-RateLimit-Reset: description: ISO 8601 timestamp when the window resets. schema: type: string format: date-time X-Cache: description: HIT or MISS. Cached hits still count against your quota. schema: type: string enum: - HIT - MISS content: application/json: schema: $ref: '#/components/schemas/ScjnTesisResponse' '400': description: Invalid request body headers: X-Request-Id: description: >- Unique id for the request (req_…). Include it in support reports. schema: type: string content: application/json: schema: $ref: '#/components/schemas/ApiError' '401': description: Missing or invalid API key headers: X-Request-Id: description: >- Unique id for the request (req_…). Include it in support reports. schema: type: string content: application/json: schema: $ref: '#/components/schemas/ApiError' '429': description: Rate limit exceeded headers: X-Request-Id: description: >- Unique id for the request (req_…). Include it in support reports. schema: type: string X-RateLimit-Limit: description: Requests allowed in the current window. schema: type: integer X-RateLimit-Remaining: description: Requests left before you are throttled. schema: type: integer X-RateLimit-Reset: description: ISO 8601 timestamp when the window resets. schema: type: string format: date-time Retry-After: description: Seconds to wait before retrying. schema: type: integer content: application/json: schema: $ref: '#/components/schemas/ApiError' '500': description: Internal error headers: X-Request-Id: description: >- Unique id for the request (req_…). Include it in support reports. schema: type: string content: application/json: schema: $ref: '#/components/schemas/ApiError' '502': description: Upstream source returned an error headers: X-Request-Id: description: >- Unique id for the request (req_…). Include it in support reports. schema: type: string content: application/json: schema: $ref: '#/components/schemas/ApiError' security: - bearerAuth: [] externalDocs: description: Interactive documentation and examples url: https://docs.usecroma.com/guides/mexico/scjn components: schemas: ScjnTesisResponse: type: object required: - data properties: data: type: object required: - found - registration_number - tesis properties: found: type: boolean registration_number: type: string tesis: oneOf: - $ref: '#/components/schemas/ScjnTesis' - type: 'null' ApiError: type: object required: - error properties: error: type: object required: - type - code - message properties: type: type: string description: >- Broad category: invalid_request_error, authentication_error, not_found_error, rate_limit_error, upstream_error, api_error. code: type: string description: Machine-readable specific code. message: type: string description: Human-readable explanation, safe to surface in UI. param: type: string description: Field that triggered the error. Present on validation errors. details: type: object description: Free-form structured detail. ScjnTesis: type: object required: - registration_number - title - subtitle - type - citation - epoch - instance - circuit - court - source - subjects - location - text - notes - precedent_notes - linked_case_registrations - linked_vote_registrations - formation - issue - publication_date - binding_date - fingerprint - official_url properties: registration_number: type: string title: type: string subtitle: type: - string - 'null' type: type: - string - 'null' enum: - jurisprudencia - aislada - null citation: type: - string - 'null' epoch: type: - string - 'null' instance: type: - string - 'null' circuit: type: - string - 'null' court: type: - string - 'null' source: type: - string - 'null' subjects: type: array items: type: string location: oneOf: - $ref: '#/components/schemas/ScjnTesisLocation' - type: 'null' text: type: - string - 'null' description: Full text of the tesis. notes: type: - string - 'null' precedent_notes: type: array items: type: string linked_case_registrations: type: array items: type: string description: Registro digital ids of the rulings this tesis derives from. linked_vote_registrations: type: array items: type: string description: Registro digital ids of published votes linked to this tesis. formation: type: - string - 'null' description: How the criterion was formed (e.g. Contradicción de criterios). issue: type: - string - 'null' description: Semanario issue, e.g. `Libro 28, Agosto de 2023`. publication_date: type: - string - 'null' format: date description: Published in the Semanario; null on pre-Gaceta tesis. binding_date: type: - string - 'null' format: date description: Date the criterion became obligatory; null on pre-Gaceta tesis. fingerprint: type: - string - 'null' official_url: type: string format: uri ScjnTesisLocation: type: object required: - book - volume - page - month - year description: Where the tesis was published inside the Semanario Judicial. properties: book: type: - string - 'null' volume: type: - string - 'null' page: type: - integer - 'null' month: type: - integer - 'null' year: type: - integer - 'null' securitySchemes: bearerAuth: type: http scheme: bearer description: 'Use Authorization: Bearer YOUR_API_KEY' ````