> ## Documentation Index > Fetch the complete documentation index at: https://docs.basaltic.sh/llms.txt > Use this file to discover all available pages before exploring further. # List delivery records > The "why didn't my webhook fire" endpoint: each record carries the attempt count, the last HTTP status, and the last error. ## OpenAPI ````yaml /api-reference/specs/notifications.yaml get /v1/deliveries openapi: 3.0.3 info: title: Basaltic Notifications API version: 1.0.0 description: | Publish/subscribe notification topics with email and webhook delivery. A topic is a fan-out root. Subscriptions bind it to endpoints; publishing to the topic delivers to every confirmed subscription whose filter policy matches the message. **Publishing is asynchronous.** Publish returns 202 as soon as the notification is durable and queued: no delivery has happened yet. Fan-out into per-subscription deliveries runs on a worker, so publish latency does not grow with subscriber count. Poll `GET /v1/messages/{message_id}` for the fan-out state and `GET /v1/deliveries?message_id=...` for per-endpoint outcomes. **Subscriptions must be confirmed.** Subscribe creates the subscription in `pending_confirmation` and sends a token to the endpoint — a link for email, a `subscription_confirmation` POST for webhooks. Nothing is delivered until the endpoint owner presents that token back. The confirmation window is 72 hours; unconfirmed subscriptions are reclaimed after it. If the handshake never arrived, `POST /v1/subscriptions/{id}/resend-confirmation` mints a fresh one — the original token is not recoverable, only its hash is stored. **Webhook endpoints must be publicly routable.** Endpoints resolving to loopback, RFC1918, link-local, or unique-local addresses are refused at subscribe time and again at delivery time. **Webhook deliveries are signed.** Each POST carries `X-Basaltic-Signature: v1,t=,s=`, an HMAC-SHA256 over `"."` keyed by the subscription's signing secret. The secret is returned once by Subscribe and is readable afterwards via the signing-secret endpoint. Verify by recomputing the MAC over the raw body you received — not a re-serialised copy — and reject timestamps more than five minutes from now. contact: name: Basaltic Support email: ping@basaltic.sh license: name: Proprietary url: https://basaltic.sh/terms servers: - url: https://notifications.{region}.basaltic.sh description: Regional API endpoint variables: region: default: sa-saopaulo-1 description: Region code security: - SignatureAuth: [] tags: - name: Topics description: Fan-out topics - name: Subscriptions description: Endpoint subscriptions and their confirmation handshake - name: Messages description: Publishing and delivery status - name: Confirmations description: Unauthenticated endpoint-owner actions paths: /v1/deliveries: get: tags: - Messages summary: List delivery records description: | The "why didn't my webhook fire" endpoint: each record carries the attempt count, the last HTTP status, and the last error. operationId: listDeliveries parameters: - name: message_id in: query description: >- Restrict to one published message. Resolved before the listing runs, so an unknown id is a 404 rather than an empty page. This is unlike /v1/delivery-statistics, which resolves nothing and simply matches no rows. schema: type: string format: uuid example: 019400aa-bbbb-7ccc-8ddd-eeeeffff0000 - name: subscription_id in: query description: Restrict to one subscription. Resolved the same way as `message_id`. schema: type: string format: uuid example: b2c3d4e5-6f7a-4b8c-9d0e-1f2a3b4c5d6e - name: status in: query schema: type: string enum: - pending - delivered - failed example: failed - $ref: '#/components/parameters/Marker' - $ref: '#/components/parameters/Limit' responses: '200': description: Paginated list of delivery records. content: application/json: schema: $ref: '#/components/schemas/DeliveryListResponse' '400': description: >- `status` outside the enum, or `message_id` / `subscription_id` / `marker` not a UUID. content: application/json: schema: $ref: '#/components/schemas/Error' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': description: >- The `message_id` or `subscription_id` filter names a resource this account does not own. content: application/json: schema: $ref: '#/components/schemas/Error' components: parameters: Marker: name: marker in: query description: Id of the last item on the previous page. schema: type: string format: uuid example: a1b2c3d4-5e6f-4a7b-8c9d-0e1f2a3b4c5d Limit: name: limit in: query description: >- Maximum items to return. A larger value is clamped to the maximum rather than rejected, so page until `meta.has_more` is false. schema: type: integer default: 50 minimum: 1 maximum: 200 example: 50 schemas: DeliveryListResponse: type: object required: - deliveries properties: deliveries: type: array items: $ref: '#/components/schemas/Delivery' meta: $ref: '#/components/schemas/PaginationMeta' Error: type: object required: - error properties: error: type: object required: - code - message - request_id properties: code: type: string description: Error code identifying the type of error example: INVALID_INPUT message: type: string description: Human-readable error message example: Invalid request parameters request_id: type: string format: uuid description: Request ID for debugging example: 550e8400-e29b-41d4-a716-446655440000 Delivery: type: object required: - id - message_id - subscription_id - protocol - endpoint - status - attempts - created_at properties: id: type: string format: uuid example: c3d4e5f6-7a8b-4c9d-8e0f-1a2b3c4d5e6f message_id: type: string format: uuid example: 019400aa-bbbb-7ccc-8ddd-eeeeffff0000 subscription_id: type: string format: uuid example: b2c3d4e5-6f7a-4b8c-9d0e-1f2a3b4c5d6e protocol: type: string enum: - email - https - http - queue example: https endpoint: type: string description: >- Recorded at fan-out, so the record still explains where a notification went after the subscription is gone. example: https://hooks.example.com/basaltic status: type: string enum: - pending - delivered - failed example: delivered attempts: type: integer example: 2 last_status_code: type: integer nullable: true description: >- HTTP status of the last attempt. Absent for a transport-level failure or an email delivery. example: 200 last_error: type: string description: Truncated to 1024 characters. example: 'endpoint returned 503: upstream unavailable' created_at: type: string format: date-time example: '2026-01-18T11:45:01Z' last_attempt_at: type: string format: date-time nullable: true example: '2026-01-18T11:45:22Z' completed_at: type: string format: date-time nullable: true example: '2026-01-18T11:45:22Z' PaginationMeta: type: object properties: total: type: integer description: Total number of items example: 150 limit: type: integer description: Number of items per page example: 20 marker: type: string description: >- Opaque cursor for the next page. Pass it back as the `marker` query parameter; treat it as a token, not a value to parse. example: 550e8400-e29b-41d4-a716-446655440000 has_more: type: boolean description: Whether there are more items example: true responses: Unauthorized: description: Authentication required or token invalid content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: UNAUTHORIZED message: Authentication required request_id: 550e8400-e29b-41d4-a716-446655440000 Forbidden: description: Insufficient permissions content: application/json: schema: $ref: '#/components/schemas/Error' example: error: code: ACCESS_DENIED message: You don't have permission to perform this action request_id: 550e8400-e29b-41d4-a716-446655440000 securitySchemes: SignatureAuth: type: apiKey in: header name: Authorization description: > Request signing with an access key issued to a service account. An HMAC-SHA256 over a canonical form of the request, close to AWS SigV4. The `basaltic` CLI signs for you. Send `Authorization`, `X-Date` (UTC, `YYYYMMDDTHHMMSSZ`) and `X-Nonce` (random per request); add `X-Content-Sha256` to bind a body, and `X-Amz-Security-Token` when using temporary credentials. ``` Authorization: BASALTIC-HMAC-SHA256 Credential=///basaltic/basaltic_request, SignedHeaders=host;x-date;x-nonce, Signature= ``` `` is the region code you are calling, or `global` for the global services. A signature is valid for 5 minutes from `X-Date`, and mutating requests are replay-guarded on the nonce. **Full signing procedure, including a working implementation:** https://docs.basaltic.sh/authentication ## Rate limits There is no global request budget. A limit applies only where an operation documents a `429`, and that operation says what it counts. Those responses carry `X-RateLimit-Limit`, `X-RateLimit-Remaining`, `X-RateLimit-Reset` and, on a `429`, `Retry-After` — read them rather than hard-coding a number. Retrying before `Retry-After` is refused and extends the window. Everything else is bounded by quota, not by request rate. ````