> ## Documentation Index > Fetch the complete documentation index at: https://docs.qanapi.com/llms.txt > Use this file to discover all available pages before exploring further. # Liveness probe > Touches nothing external, so a database outage cannot make an orchestrator restart otherwise healthy nodes. ## OpenAPI ````yaml /openapi/stand-alone/v3.yaml get /health/live openapi: 3.1.0 info: title: Qanapi Standalone API version: 3.0.0 summary: Single-tenant encryption, key management, classification and audit service. description: > A standalone cryptographic service. Callers hand it data and it returns ciphertext, or hand it ciphertext and it returns data, with every operation authorised by policy and recorded on a tamper-evident audit trail. ## Authentication Two credentials reach the same principal: - **API key** in `X-Qanapi-Authorization`, for machine callers. A key reaches only the configurations it is linked to. - **User bearer token** in `Authorization`, from `POST /api/v3/auth/login`, for a person working through a console. An API key outranks a bearer token when a request carries both, because a key names a narrower credential than the user that owns it. ## Request bodies Endpoints that take a JSON body require `Content-Type: application/json`. The two encryption endpoints are the exception: in whole-body mode they accept any bytes at all, whatever the content type says. ## Errors Every error body carries `message`, which is human readable, and `error`, a stable machine readable code that clients can branch on. Validation failures additionally carry an `errors` object keyed by the field each message concerns; a failure with no single field to blame is filed under `request`. ## Rate limiting Every response carries `X-RateLimit-Limit` and `X-RateLimit-Remaining`. The window is per node and keyed on the client address, so a cluster of n nodes admits n times the configured figure. `POST /api/v3/auth/login` is limited separately and more strictly, ten a minute against sixty, because it needs no credential to reach and each attempt costs a full password verification. A successful login clears that budget, so the stricter limit falls on failed attempts rather than on legitimate sign-ins. ## Correlation Send `X-Request-Id` to tie a request to your own trace. The value is preserved on the audit record and echoed on the response, provided it is at most 64 characters of letters, digits, `-`, `_`, `.` or `:`; anything else is replaced with a generated id. Omit the header and one is generated for you. ## End-to-end encrypted requests and responses Any endpoint accepts a request body wrapped as an RFC 7516 JWE, so the payload is unreadable by anything between your client and this service, including the reverse proxy that terminates TLS. Wrap the JSON body to the key from `GET /api/v3/qanapi-public-key` and send it with `Content-Type: application/jose`; `application/jwt` and `application/jose+json` are accepted too, and a body that is plainly a compact JWE is recognised even without one of those content types. Where the installation requires it, the wrapped payload must carry `iat`, `exp` and `jti` claims, which also make each payload single-use. To have the **response** wrapped in turn, send `X-Qanapi-Wrap-With-Key-Id` naming an RSA key held in this service's KMS that you hold the private half of. The response then arrives as a compact JWE with `Content-Type: application/jose`. The header spelling `wrap_with_key_id` is accepted as well. The wrapping key is resolved with the same permission a plain key read needs, so a caller who may not read that key gets an error instead of a wrapped body. license: name: Proprietary identifier: LicenseRef-Qanapi-Commercial servers: - url: https://{host} description: A deployed instance, behind the reverse proxy that terminates TLS. variables: host: default: qanapi.example.com - url: http://localhost:8000 description: A local cluster, through its load balancer. security: - ApiKeyAuth: [] - BearerAuth: [] tags: - name: STAND Health description: > Liveness and readiness probes. Registered outside the authentication, audit and transport layers, so a load balancer polling them without credentials still gets an answer. - name: STAND Authentication description: > Logging in. There is no registration endpoint: the first administrator is created from the command line on the host, so nothing reachable over the network can claim an installation that has no users yet. Later accounts are created through `POST /api/v3/users`. - name: STAND Users description: User accounts and their roles. - name: STAND API keys description: > Machine credentials. A key is scoped to a set of configurations and reaches nothing until it is linked to at least one. - name: STAND Configurations description: > Encryption configurations. A configuration owns a master key and is the unit of cryptographic isolation. - name: STAND Classifications description: Sensitivity labels and the clearance that reaches them. - name: STAND Policies description: Allow and deny rules binding a principal to actions on resources. - name: STAND Encryption description: > The data plane. Field-level or whole-body encryption under a configuration, optionally forwarded onward to a destination of the caller's choosing. - name: STAND KMS description: Customer-managed key lifecycle, import and export. - name: STAND Audit description: The tamper-evident record of everything the service did. - name: STAND Transport description: The service's own key pair, for end-to-end encrypted request bodies. paths: /health/live: get: tags: - STAND Health summary: Liveness probe description: | Touches nothing external, so a database outage cannot make an orchestrator restart otherwise healthy nodes. operationId: healthLive responses: '200': description: The process is running. content: application/json: schema: type: object required: - status - instance_id - version properties: status: type: string const: ok instance_id: type: string description: Which cluster node answered. examples: - node-01 version: type: string examples: - 1.0.1 security: [] components: securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-Qanapi-Authorization description: | A machine credential, `qk_` followed by its secret. Only a hash of the secret is stored, so a key is displayed exactly once, when it is created or rotated. A key reaches only the configurations it is linked to. It may also be sent as `Authorization: Bearer qk_...`, which is recognised by the prefix. BearerAuth: type: http scheme: bearer bearerFormat: JWT description: | A user token from `POST /api/v3/auth/login`. The token asserts a role, but the database decides it, so a role changed or a user deleted after the token was issued takes effect immediately. A token minted before a password change is refused. ````