> ## Documentation Index > Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt > Use this file to discover all available pages before exploring further. # Batch check PIX key existence > Probes up to 200 PIX key values for existence in one call, backed by the BACEN DICT keys/check (dict-np host). Returns one existence-only result per submitted key, in submission order. Requires the dict-np endpoint; a 503 is returned when it is unconfigured. ## OpenAPI ````yaml en/openapi/v3-current/spi-dict.yaml post /api/v1/dict/keys/check openapi: 3.1.0 info: contact: email: contact@lerian.studio name: Lerian Studio url: https://lerian.studio description: >- OpenAPI 3.1 surface for the DICT (Diretório de Identificadores de Contas Transacionais) capability of Lerian SPI, the direct integration between the institution and the Brazilian Instant Payment System (SPI/Pix). It covers the PIX key lifecycle, portability and ownership claims, infraction reports, refunds, fraud markers, synchronous DICT reports, and the internal reconciliation and provisioning operations that keep the key directory consistent. license: name: Lerian Studio General License title: Lerian SPI — DICT API version: 1.0.0 servers: - url: https://spi.sandbox.lerian.net security: [] tags: - description: 'PIX key lifecycle: register, list, search, lookup, delete, and statistics.' name: Keys - description: >- PIX key portability and ownership claims through their full lifecycle (initiate, confirm, reject, cancel, acknowledge, complete). name: Claims - description: 'DICT infraction reports: create, list, and retrieve.' name: Infractions - description: 'DICT refund requests: create, list, and retrieve.' name: Refunds - description: 'PIX fraud markers: create, list, and statistics.' name: Fraud Markers - description: >- Synchronous reports over Lerian SPI's own DICT record: COUNT(*) summaries of keys (by type/status) and claims (by type/status + open-past-deadline). COUNT-only — DICT holds no money. name: Reports - description: >- Internal DICT operations: reconciliation runs, participant ISPB provisioning, claim deadline processing, and orphaned-key cleanup. name: Internal paths: /api/v1/dict/keys/check: post: tags: - Keys summary: Batch check PIX key existence description: >- Probes up to 200 PIX key values for existence in one call, backed by the BACEN DICT keys/check (dict-np host). Returns one existence-only result per submitted key, in submission order. Requires the dict-np endpoint; a 503 is returned when it is unconfigured. operationId: checkKeys requestBody: content: application/json: schema: $ref: '#/components/schemas/CheckKeysRequest' description: >- Up to 200 PIX key values to probe for existence in one batch (backed by BACEN dict-np keys/check); response is existence-only required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/CheckKeysResponse' description: One existence result per submitted key, in submission order description: OK default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: CheckKeysRequest: additionalProperties: false properties: keys: description: PIX key values to probe for existence (1..200 per batch). items: type: string maxItems: 200 minItems: 1 type: - array - 'null' required: - keys type: object CheckKeysResponse: additionalProperties: false properties: results: description: One existence result per submitted key, in submission order. items: $ref: '#/components/schemas/CheckKeyResult' type: - array - 'null' required: - results type: object Detail: additionalProperties: false properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). examples: - ERR-0001 type: string detail: description: >- A human-readable explanation specific to this occurrence of the problem. examples: - Property foo is required but is missing. type: string errors: description: Optional list of individual error details items: $ref: '#/components/schemas/ErrorDetail' type: - array - 'null' instance: description: >- A URI reference that identifies the specific occurrence of the problem. examples: - https://example.com/error-log/abc123 format: uri type: string status: description: HTTP status code examples: - 400 format: int64 type: integer title: description: >- A short, human-readable summary of the problem type. This value should not change between occurrences of the error. examples: - Bad Request type: string type: default: about:blank description: A URI reference to human-readable documentation for the error. examples: - https://example.com/errors/example format: uri type: string type: object CheckKeyResult: additionalProperties: false properties: hasEntry: description: Whether the key has a DICT entry. examples: - true type: boolean key: description: The submitted PIX key value. examples: - '12345678901' type: string required: - key - hasEntry type: object ErrorDetail: additionalProperties: false properties: location: description: >- Where the error occurred, e.g. 'body.items[3].tags' or 'path.thing-id' type: string message: description: Error message text type: string value: description: The value at the given location type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ````