> ## Documentation Index > Fetch the complete documentation index at: https://docs.catalog.igvf.org/llms.txt > Use this file to discover all available pages before exploring further. # Biosamples Variants > Retrieve data from STARR-seq, BlueSTARR, and MPRA for a given biosample. At least one of these fields is required: biosample_id or biosample_name. The limit parameter controls the page size and can not exceed 100. Pagination is 0-based. **Examples by method** These examples are grouped by method; use the `method` filter to return data from a specific method. **MPRA:** **query by biosample identifier** - biosample_id = EFO_0001182 - method = MPRA - element_id = MPRA_chr1_1000079_1000279_GRCh38_plus_IGVFFI7321WGMD - significant = true **STARR-seq:** **query by biosample identifier** - biosample_id = EFO_0002067 - method = STARR-seq **BlueSTARR:** **query by biosample identifier** - biosample_id = EFO_0002067 - method = BlueSTARR ## OpenAPI ````yaml /openapi/catalog-dev.openapi.json get /biosamples/variants openapi: 3.0.3 info: title: IGVF Catalog - Development description: >- Development IGVF Catalog OpenAPI compliant REST API built using tRPC with Express. Our database uses 0-based, half-open coordinates for genomic coordinates in the GRCh38 (human) and GRCm39 (mouse) reference genomes. Data is licensed under the Creative Commons license and the software is licensed under the MIT license. version: 1.2.0 - DEV servers: - url: https://catalog-api-dev.demo.igvf.org/api security: [] externalDocs: url: https://api-dev.catalog.igvf.org/openapi paths: /biosamples/variants: get: summary: Biosamples Variants description: >- Retrieve data from STARR-seq, BlueSTARR, and MPRA for a given biosample. At least one of these fields is required: biosample_id or biosample_name. The limit parameter controls the page size and can not exceed 100. Pagination is 0-based. **Examples by method** These examples are grouped by method; use the `method` filter to return data from a specific method. **MPRA:** **query by biosample identifier** - biosample_id = EFO_0001182 - method = MPRA - element_id = MPRA_chr1_1000079_1000279_GRCh38_plus_IGVFFI7321WGMD - significant = true **STARR-seq:** **query by biosample identifier** - biosample_id = EFO_0002067 - method = STARR-seq **BlueSTARR:** **query by biosample identifier** - biosample_id = EFO_0002067 - method = BlueSTARR operationId: variantsFromBiosamples parameters: - name: biosample_id in: query required: false schema: type: string - name: biosample_name in: query required: false schema: type: string - name: files_fileset in: query required: false schema: type: string - name: method in: query required: false schema: type: string enum: - BlueSTARR - MPRA - STARR-seq - name: element_id in: query required: false schema: type: string - name: significant in: query required: false schema: type: string enum: - 'true' - 'false' - name: organism in: query required: false schema: type: string enum: - Homo sapiens default: Homo sapiens - name: verbose in: query required: false schema: type: string enum: - 'true' - 'false' default: 'false' - name: page in: query required: false schema: type: number default: 0 - name: limit in: query required: false schema: type: number responses: '200': description: Successful response content: application/json: schema: type: array items: type: object properties: variant: anyOf: - type: string - type: object properties: _id: type: string chr: type: string pos: type: number rsid: type: array items: type: string nullable: true ref: type: string alt: type: string spdi: type: string hgvs: type: string ca_id: type: string nullable: true strain: type: array items: type: string nullable: true qual: type: string nullable: true files_filesets: type: string nullable: true annotations: type: object properties: bravo_af: type: number nullable: true gnomad_af_total: type: number nullable: true gnomad_af_afr: type: number nullable: true gnomad_af_afr_female: type: number nullable: true gnomad_af_afr_male: type: number nullable: true gnomad_af_ami: type: number nullable: true gnomad_af_ami_female: type: number nullable: true gnomad_af_ami_male: type: number nullable: true gnomad_af_amr: type: number nullable: true gnomad_af_amr_female: type: number nullable: true gnomad_af_amr_male: type: number nullable: true gnomad_af_asj: type: number nullable: true gnomad_af_asj_female: type: number nullable: true gnomad_af_asj_male: type: number nullable: true gnomad_af_eas: type: number nullable: true gnomad_af_eas_female: type: number nullable: true gnomad_af_eas_male: type: number nullable: true gnomad_af_female: type: number nullable: true gnomad_af_fin: type: number nullable: true gnomad_af_fin_female: type: number nullable: true gnomad_af_fin_male: type: number nullable: true gnomad_af_male: type: number nullable: true gnomad_af_nfe: type: number nullable: true gnomad_af_nfe_female: type: number nullable: true gnomad_af_nfe_male: type: number nullable: true gnomad_af_oth: type: number nullable: true gnomad_af_oth_female: type: number nullable: true gnomad_af_oth_male: type: number nullable: true gnomad_af_sas: type: number nullable: true gnomad_af_sas_male: type: number nullable: true gnomad_af_sas_female: type: number nullable: true gnomad_af_raw: type: number nullable: true GENCODE_category: type: string nullable: true funseq_description: type: string nullable: true additionalProperties: false nullable: true source: type: string source_url: type: string organism: type: string nullable: true required: - _id - chr - pos - ref - alt - annotations - source - source_url - organism additionalProperties: false biosample: anyOf: - type: string - type: object properties: uri: type: string term_id: type: string name: type: string synonyms: type: array items: type: string nullable: true description: type: string nullable: true source: type: string subontology: type: string nullable: true source_url: type: string nullable: true required: - uri - term_id - name additionalProperties: false genomic_element: anyOf: - type: string - type: object properties: _id: type: string name: type: string nullable: true chr: type: string nullable: true start: type: number nullable: true end: type: number nullable: true type: type: string nullable: true source: type: string nullable: true source_url: type: string nullable: true source_annotation: type: string nullable: true required: - _id additionalProperties: false nullable: true strand: type: string nullable: true log2FC: type: number nullable: true DNA_count_ref: type: number nullable: true DNA_count_alt: type: number nullable: true RNA_count_ref: type: number nullable: true RNA_count_alt: type: number nullable: true postProbEffect: type: number nullable: true CI_lower_95: type: number nullable: true CI_upper_95: type: number nullable: true significant: type: boolean nullable: true neg_log10_pvalue: type: number nullable: true neg_log10_pvalue_adj: type: number nullable: true label: type: string method: type: string class: type: string nullable: true source: type: string source_url: type: string name: type: string files_filesets: type: string nullable: true required: - label - method - source - source_url - name additionalProperties: false default: $ref: '#/components/responses/error' components: responses: error: description: Error response content: application/json: schema: type: object properties: message: type: string code: type: string issues: type: array items: type: object properties: message: type: string required: - message additionalProperties: false required: - message - code additionalProperties: false ````