> ## Documentation Index > Fetch the complete documentation index at: https://docs.trio.com.br/llms.txt > Use this file to discover all available pages before exploring further. # List institutions > List institutions - Banking ## OpenAPI ````yaml v2/api-reference/openapi.json GET /v2/institutions openapi: 3.0.0 info: title: Trio API v2 version: 2026-10-19.v2 servers: - url: https://api.sandbox.trio.com.br variables: {} - url: https://api.qa.trio.com.br variables: {} - url: https://api.trio.com.br variables: {} security: [] tags: [] paths: /v2/institutions: parameters: - description: >- Version of the v2 contract the client is written against. Each breaking change publishes a new version. example: 2026-10-19.v2 in: header name: Trio-Version required: true schema: enum: - 2026-10-19.v2 type: string x-struct: null x-validate: null - description: >- ID of another org to act on instead of the API key's own org. The key's org must have been granted access to it, and the request is refused with 403 FORBIDDEN otherwise. When that access or the API key is read-only, only GET and HEAD requests may carry it. When the target org requires mTLS, so does the request. Leave it out to act on the key's own org. in: header name: Trio-Target-Org-Id required: false schema: format: uuid type: string x-struct: null x-validate: null get: tags: - Institutions summary: List institutions description: List institutions - Banking operationId: TrioFoundationWeb.V2.InstitutionController.index parameters: - description: Bank ISPB in: query name: ispb required: false schema: type: string x-struct: null x-validate: null - description: Bank Number in: query name: number required: false schema: type: string x-struct: null x-validate: null responses: '200': content: application/json: schema: $ref: '#/components/schemas/V2_list_institutions_response' description: Institutions '400': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- Malformed request: a body that is not valid JSON (MALFORMED_REQUEST), or a Trio-Version header that is missing or not the current one (INVALID_TRIO_VERSION). '401': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: Missing or invalid API key credentials (INVALID_CREDENTIALS). '403': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- The API key may not do this (FORBIDDEN): for instance Trio-Target-Org-Id names an org it has no access to, or writes through a read-only access. '422': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- Invalid input (INVALID_PARAMETER, REQUIRED_PARAMETER, or the code of the rule the request breaks). A request outside the operation's schema lists the offending fields in `errors`. '503': content: application/json: schema: $ref: '#/components/schemas/V2_error' description: >- A service needed to answer is unavailable (TRIO_SERVICE_UNAVAILABLE). callbacks: {} security: - authorization: [] components: schemas: V2_list_institutions_response: description: List of financial institutions example: data: - authorized: true display_name: 001 - 000000001 - Nome do Banco Ltda full_name: Nome do Banco Ltda id: 41234d60-f6a9-4c9c-8cc3-5769ce9bbea2 inserted_at: '2024-10-17T13:32:59.374149Z' ispb: '00000001' name: Nome do Banco number: '001' updated_at: '2024-10-17T13:32:59.374149Z' properties: data: items: $ref: '#/components/schemas/V2_institution' type: array x-struct: null x-validate: null title: V2 list institutions response type: object x-struct: Elixir.TrioFoundationWeb.Schemas.Banking.V2.Institution.ListResponse x-validate: null V2_error: example: error: error_code: INVALID_PARAMETER error_message: 'Invalid parameters: /amount: Invalid integer. Got: string' errors: - field: /amount message: 'Invalid integer. Got: string' properties: error: properties: error_code: description: >- Stable UPPER_SNAKE identifier of the error, for programs and logs. Branch on this, not on the message. type: string x-struct: null x-validate: null error_message: description: Human readable explanation of the error. type: string x-struct: null x-validate: null errors: description: >- Only on INVALID_PARAMETER for a request outside the operation's schema: one entry per offending field. items: properties: field: description: JSON pointer to the field, e.g. /amount. type: string x-struct: null x-validate: null message: description: What is wrong with it. type: string x-struct: null x-validate: null required: - field - message type: object x-struct: null x-validate: null type: array x-struct: null x-validate: null required: - error_code - error_message type: object x-struct: null x-validate: null required: - error title: V2 error type: object x-struct: Elixir.TrioFoundationWeb.Schemas.HTTP.V2Error x-validate: null V2_institution: description: A financial institution example: authorized: true display_name: 001 - 000000001 - Nome do Banco Ltda full_name: Nome do Banco Ltda id: 41234d60-f6a9-4c9c-8cc3-5769ce9bbea2 inserted_at: '2024-10-17T13:32:59.374149Z' ispb: '00000001' name: Nome do Banco number: '001' updated_at: '2024-10-17T13:32:59.374149Z' properties: authorized: description: Authorized institution? type: boolean x-struct: null x-validate: null display_name: description: Institution display name type: string x-struct: null x-validate: null full_name: description: Institution full name type: string x-struct: null x-validate: null id: description: Institution ID format: uuid type: string x-struct: null x-validate: null inserted_at: description: Creation date and time format: date-time type: string x-struct: null x-validate: null ispb: description: Institution ISPB type: string x-struct: null x-validate: null name: description: Institution name type: string x-struct: null x-validate: null number: description: Institution bank number type: string x-struct: null x-validate: null updated_at: description: Last update date and time format: date-time type: string x-struct: null x-validate: null title: V2 institution type: object x-struct: Elixir.TrioFoundationWeb.Schemas.Banking.V2.Institution.InstitutionData x-validate: null securitySchemes: authorization: scheme: basic type: http ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.