> ## 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. # List outbound messages of every code > Every message this institution has issued to the câmara, newest first, whatever its code. Narrow with status to work a backlog: FAILED is the set the rail will never deliver as stored and an operator has to act on, REFUSED the set the câmara received and returned as its E twin, and this list is the only way to see a message whose code this build does not recognise. The projection is the columns every SFN request carries; the stored request is not interpreted here, so read a code's own operation for its own fields. ## OpenAPI ````yaml /en/openapi/v3-current/siloc.yaml get /api/v1/siloc/outbound/messages openapi: 3.1.0 info: description: >- OpenAPI 3.1 surface for Lerian SILOC, the participant-side rail connecting the institution to Núclea's SILOC deferred-net interbank settlement. title: Lerian SILOC API version: 1.0.0 servers: - url: https://siloc.sandbox.lerian.net security: [] paths: /api/v1/siloc/outbound/messages: get: tags: - Schedule summary: List outbound messages of every code description: >- Every message this institution has issued to the câmara, newest first, whatever its code. Narrow with status to work a backlog: FAILED is the set the rail will never deliver as stored and an operator has to act on, REFUSED the set the câmara received and returned as its E twin, and this list is the only way to see a message whose code this build does not recognise. The projection is the columns every SFN request carries; the stored request is not interpreted here, so read a code's own operation for its own fields. operationId: listOutboundMessages parameters: - description: Narrow to one lifecycle state; omit for every message. explode: false in: query name: status schema: description: Narrow to one lifecycle state; omit for every message. enum: - SUBMITTED - DISPATCHED - ANSWERED - REFUSED - FAILED type: string - description: Page size, at most 200. Defaults to 50. explode: false in: query name: limit schema: description: Page size, at most 200. Defaults to 50. format: int64 maximum: 200 minimum: 1 type: integer responses: '200': content: application/json: schema: $ref: '#/components/schemas/OutboundMessageListResponse' description: OK '422': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Unprocessable Entity '500': content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Internal Server Error default: content: application/problem+json: schema: $ref: '#/components/schemas/Detail' description: Error security: - BearerAuth: [] components: schemas: OutboundMessageListResponse: additionalProperties: false properties: items: description: >- The messages on this page, newest first (never null; empty when none match). items: $ref: '#/components/schemas/OutboundMessageResponse' type: array required: - items type: object Detail: additionalProperties: true properties: code: description: >- Stable, machine-readable domain error code scoped to the emitting service (format: -NNNN). 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 upstream: $ref: '#/components/schemas/Upstream' description: >- RFC 9457 extension member: the error a proxied third-party provider reported. Absent unless the emitting service explicitly surfaced one. type: object OutboundMessageResponse: additionalProperties: false properties: answeredAt: description: When the câmara's answer was applied; omitted until it is. format: date-time type: string attempts: description: Queue-put attempts made so far. format: int64 type: integer codMsg: description: The SFN message code this row carries, e.g. LDL0023. type: string codProdt: description: >- The SILOC product, OT or SLC; omitted when the message's layout carries no product element. type: string dispatchedAt: description: When the frame reached the send queue; omitted until it has. format: date-time type: string id: description: Outbound message id. format: uuid type: string lastError: description: Why the last attempt failed; omitted when none has. type: string nextAttemptAt: description: >- When the next queue put comes due; omitted once the row is terminal or answered. format: date-time type: string numCtrlIF: description: >- The control number this institution issued. The câmara echoes it on the answer, which is what correlates the two. type: string nuop: description: The BCMSG operation number of the frame. type: string status: description: >- Lifecycle state. REFUSED and FAILED are both terminal and are different facts: REFUSED means the câmara received the message and returned its E twin, FAILED means this rail could not deliver it and will not retry. enum: - SUBMITTED - DISPATCHED - ANSWERED - REFUSED - FAILED type: string submittedAt: description: When the message was recorded. format: date-time type: string required: - id - codMsg - numCtrlIF - nuop - status - attempts - submittedAt 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 Upstream: additionalProperties: false properties: code: description: The upstream provider's own error code, verbatim. examples: - E4001 type: string message: description: >- The upstream provider's own error message, verbatim (bounded, never its raw response body). examples: - account not found at provider type: string type: object securitySchemes: BearerAuth: bearerFormat: JWT description: JWT bearer token issued by the identity provider. scheme: bearer type: http ````