> ## 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. # Initiate connectivity (ECO) test > Prerequisite: an active certificate (see rotateCertificate, activateCertificate) and a READY readiness report (see getReadiness) before the connectivity test; a passing connectivity test is itself the prerequisite for a submit operation (see createBankTransferOperation). Builds a GEN0001 echo request addressed to the given participant, persists it as SUBMITTED before rail dispatch, and lets the outbound relay dispatch it to the RSFN. The counterparty answers with GEN0001R1 echoing the message back; the response correlates by NUOp and confirms the test. Idempotent — replaying the same X-Idempotency key with the same body returns the cached response. ## OpenAPI ````yaml en/openapi/v3-current/spb.yaml post /v1/str/connectivity-tests openapi: 3.1.0 info: contact: email: contact@lerian.studio name: Lerian Studio url: https://lerian.studio description: >- OpenAPI 3.1 surface for Lerian SPB, the direct integration between the institution and the Brazilian Payment System (SPB) over the National Financial System Network (RSFN). It covers the Reserve Transfer System (STR): message registry and capability catalog, operation lifecycle (bank transfers, IBS repasses, liquidity transfers, returns and cancellations), reserve-account and schedule queries, alçada governance, reconciliation, and event delivery. license: name: Lerian Studio General License title: Lerian SPB API version: 1.0.0 servers: - url: https://spb.sandbox.lerian.net security: [] tags: - description: Immutable audit-record trails for STR operations and lifecycle events. name: Audit - description: >- STR capability catalog describing supported message types and their constraints. name: Capabilities - description: >- ICP-Brasil certificate inventory with hot-reloadable rotation and activation. name: Certificates - description: >- Maker-checker approval queue for emissions parked above their alçada band: list pending, sign (approve), and deny. name: EmissionApprovals - description: Webhook event-delivery records with retry control for failed dispatches. name: EventDeliveries - description: Operation event catalog enumerating the emitted domain event types. name: Events - description: >- Inbound GEN-family notice log (GEN0001 connectivity echo, GEN0004 transmission error, GEN0005 administrative notice). name: GenNotices - description: >- SPB alçada governance: the value-band table and per-message-type signature requirements, hot-reloaded at runtime. name: Governance - description: >- Read raw STR message status: list messages and read a single message by NUOp. name: Messages - description: Aggregated operational summaries and metrics across STR operations. name: OperationalIntelligence - description: >- STR operation lifecycle for bank transfers and IBS repasses, including returns and cancellations. name: Operations - description: >- Service readiness state covering startup self-probes and dependency health. name: Readiness - description: Reconciliation cases and the actions that resolve operation discrepancies. name: Reconciliation - description: >- STR reports suite: synchronous, date-ranged aggregate reports (financial movement, rejected transactions, volumetria) over Lerian SPB's own transmission record. name: Reports - description: >- STR0013 reserve-account balance and STR0014 statement (extrato, message-mode) queries and their async results. name: ReserveQueries - description: >- GEN0019 participant responsável roster: full-replacement updates announced to BACEN. name: Responsibles - description: STR operating-window schedule governing when operations may be sent. name: Schedule - description: >- STR0001 single-party schedule queries (consulta de horários do STR) and their async STR0001R1 grid results. name: ScheduleQueries - description: Runtime SPB configuration settings for the STR integration. name: Settings - description: Webhook endpoint registration and management for event delivery. name: Webhooks - description: >- Flow (mandatory order): certificate → readiness → connectivity-test → submit. Activate a certificate, confirm the rail reports ready, pass a connectivity test, then submit an operation. Each step is its own resource; a submit must not be attempted before readiness passes. name: onboarding - description: >- Flow (mandatory order): parent operation SETTLED → return/cancel. A return or cancellation is a sub-resource of a settled parent operation; the {operationId}/{endToEndID} path segment enforces the parent structurally. name: lifecycle paths: /v1/str/connectivity-tests: post: tags: - Messages - onboarding summary: Initiate connectivity (ECO) test description: >- Prerequisite: an active certificate (see rotateCertificate, activateCertificate) and a READY readiness report (see getReadiness) before the connectivity test; a passing connectivity test is itself the prerequisite for a submit operation (see createBankTransferOperation). Builds a GEN0001 echo request addressed to the given participant, persists it as SUBMITTED before rail dispatch, and lets the outbound relay dispatch it to the RSFN. The counterparty answers with GEN0001R1 echoing the message back; the response correlates by NUOp and confirms the test. Idempotent — replaying the same X-Idempotency key with the same body returns the cached response. operationId: createConnectivityTest parameters: - description: Idempotency key (primary). in: header name: X-Idempotency schema: description: Idempotency key (primary). type: string - description: Idempotency key (legacy alias for X-Idempotency). in: header name: X-Idempotency-Key schema: description: Idempotency key (legacy alias for X-Idempotency). type: string - description: Idempotency key TTL in seconds (overrides the configured default). in: header name: X-TTL schema: description: Idempotency key TTL in seconds (overrides the configured default). type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/ConnectivityTestRequest' required: true responses: '201': content: application/json: schema: $ref: '#/components/schemas/ConnectivityTestResponse' description: Created links: prerequisite: description: >- Onboarding prerequisite: the rail readiness reported by getReadiness must be READY before a connectivity test is meaningful. operationId: getReadiness default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: ConnectivityTestRequest: additionalProperties: false properties: message: description: >- Optional free-text MsgECO payload echoed back by the counterparty (max 256 chars). examples: - connectivity check type: string recipientIspb: description: >- ISPB of the counterparty participant the echo is addressed to (8 numeric digits). examples: - 38166 type: string required: - recipientIspb type: object ConnectivityTestResponse: additionalProperties: false properties: controlNumber: description: IF control number assigned to the GEN0001 submission. examples: - '20260610000001' type: string messageType: description: >- STR message code of the submission (always GEN0001 for connectivity tests). examples: - GEN0001 type: string nuOp: description: >- BACEN protocol identifier (NUOp) assigned to the GEN0001 connectivity-test submission. examples: - '12345678202606100000001' type: string status: description: >- Submission status; SUBMITTED until the counterparty's GEN0001R1 echo correlates by NUOp and flips it to CONFIRMED. examples: - SUBMITTED type: string submittedAt: description: RFC3339 UTC timestamp when the submission was persisted before send. examples: - '2026-06-10T12:00:00Z' type: string required: - nuOp - controlNumber - messageType - status - submittedAt 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 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 ````