> ## Documentation Index > Fetch the complete documentation index at: https://docs.musixmatch.com/llms.txt > Use this file to discover all available pages before exploring further. # Search musical works by writer > One writer IPI in, the musical works credited to that party out, 25 to a page. Credit, not ownership: no shares, no territory, no administrators, no recordings. The ISWC is the row's identity, so take it into the other two musical-work methods for the full picture. No governing registration is required here, so some ISWCs returned will yield nothing there. A publisher IPI answers with an empty list rather than the catalogue it administers: this method reports writer credit only. An IPI we hold nothing for is likewise an empty list, never a 404. The first 400 pages (10,000 registrations) of a writer are servable; past that the request is a 400 with `hint_code` `page_unreachable`. ## OpenAPI ````yaml /enterprises/publishing/openapi.json post /ws/1.1/musicalwork.search.post openapi: 3.1.0 info: title: Musixmatch Publishing API version: 1.0.0 description: >- Read the publishing side of the Musixmatch catalog: given a recording, who administers and owns its musical works; given a musical work, which recordings exist of it; given a writer, which works are credited to them. Every method answers over HTTP 200. The outcome of the call is `message.header.status_code`, and a 4xx carries a prose `hint` beside a machine-readable `hint_code`. servers: - url: https://api.musixmatch.com security: - apiKey: [] paths: /ws/1.1/musicalwork.search.post: post: tags: - Musical works summary: Search musical works by writer description: >- One writer IPI in, the musical works credited to that party out, 25 to a page. Credit, not ownership: no shares, no territory, no administrators, no recordings. The ISWC is the row's identity, so take it into the other two musical-work methods for the full picture. No governing registration is required here, so some ISWCs returned will yield nothing there. A publisher IPI answers with an empty list rather than the catalogue it administers: this method reports writer credit only. An IPI we hold nothing for is likewise an empty list, never a 404. The first 400 pages (10,000 registrations) of a writer are servable; past that the request is a 400 with `hint_code` `page_unreachable`. operationId: musicalworkSearchPost parameters: - $ref: '#/components/parameters/page' requestBody: required: true content: application/json: schema: type: object required: - writer properties: writer: type: object required: - ipi properties: ipi: type: string description: >- The writer's IPI, up to 11 digits. Zero-padded for you; a placeholder IPI is rejected. example: writer: ipi: '00528181729' responses: '200': description: >- One page of the writer's works. `available` counts registrations, which runs ahead of the distinct ISWCs a page renders. content: application/json: schema: $ref: '#/components/schemas/WriterWorksEnvelope' example: message: header: status_code: 200 execute_time: 0.147 body: pagination: available: 312 returned_elements: 25 current_page: 1 page_size: 25 total_pages: 13 result_list: - iswc: T9214745718 title: Rolling in the Deep - iswc: T9053393649 title: Someone Like You '400': $ref: '#/components/responses/BadRequest' '403': $ref: '#/components/responses/Forbidden' '500': $ref: '#/components/responses/ServerError' components: parameters: page: name: page in: query required: false schema: type: integer minimum: 1 default: 1 description: >- The 1-based page to return. A page past the end is an empty `result_list`, not an error. schemas: WriterWorksEnvelope: type: object properties: message: type: object properties: header: $ref: '#/components/schemas/Header' body: type: object properties: pagination: $ref: '#/components/schemas/Pagination' result_list: type: array items: type: object properties: iswc: type: string title: type: - string - 'null' Header: type: object properties: status_code: type: integer description: The outcome of the call. The HTTP status is always 200. execute_time: type: number description: Server-side execution time in seconds Pagination: type: object properties: available: type: integer description: How many rows exist in total returned_elements: type: integer description: How many rows this page carries current_page: type: integer page_size: type: integer description: Fixed at 25. `page_size` is not accepted as a parameter. total_pages: type: integer ErrorResponse: type: object properties: message: type: object properties: header: type: object properties: status_code: type: integer execute_time: type: number hint: type: string description: What is wrong with the request, in prose hint_code: type: string description: >- A stable slug for the same fault. Part of the contract; the prose is not. enum: - invalid_request - unknown_property - too_many_items - invalid_isrc - invalid_iswc - invalid_ipi - page_unreachable body: type: array items: {} responses: BadRequest: description: >- The request is not usable. Returned over HTTP 200 with `status_code` 400 in the header, alongside `hint` and `hint_code`. Any fault fails the whole request: there is no per-row invalid state. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' Forbidden: description: >- The API key is not entitled to this method. Returned over HTTP 200 with `status_code` 403 in the header. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' ServerError: description: >- A read failed. Returned over HTTP 200 with `status_code` 500 in the header. A failed read is never an empty result. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' securitySchemes: apiKey: type: apiKey name: apikey in: query ````