> ## Documentation Index
> Fetch the complete documentation index at: https://docs.parmanasystems.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fetch a public signing key for independent, offline verification

> Deliberately unauthenticated, like GET /audit/verify and GET /refusal/verify.



## OpenAPI

````yaml openapi.bundled.yaml GET /keys/{keyId}
openapi: 3.1.0
info:
  title: Parmana API
  version: 1.0.0
  description: >
    Parmana is an Execution Trust Infrastructure that ensures there is no gap
    between what humans decide and what AI systems do. The API enables creation,
    execution, verification, replay, and auditing of Business Transactions
    through cryptographically verifiable Execution Trust Records.


    **Every route requires a caller bearer key**, except the liveness/readiness
    probes and documentation/verification routes that must be reachable with no
    credential: GET /health, GET /ready, GET /openapi.yaml, GET /documentation,
    GET /reference, POST /refusal/verify, POST /audit/verify, GET /keys/{keyId},
    and GET /.well-known/jwks.json. Send `Authorization: Bearer <key>` on every
    other request. Keys are issued by `scripts/generate-api-key.ts` and
    configured server-side via `PARMANA_API_KEYS`; only a hash of each key is
    ever held by the server, verified in constant time. A missing or invalid
    credential returns 401 before a Business Transaction is even constructed,
    independent of Policy evaluation and gateway attestation, see
    `packages/api/src/middleware/caller-auth.ts` and
    [Authentication](/api-reference/authentication). Local development may set
    `PARMANA_AUTH_DISABLED=true` to skip this middleware entirely; that flag
    must never be set in a real deployment.
  contact:
    name: Parmana Systems
    email: founder@parmanasystems.com
  license:
    name: Proprietary, source-available for evaluation only, see LICENSE
    url: https://github.com/pavancharak/AgentLabsBuildathon/blob/main/LICENSE
servers:
  - url: https://parmana-api-real.vercel.app
    description: >-
      Production (real, deployed instance -- the docs site playground uses this
      by default)
  - url: http://localhost:3000
    description: Local (packages/api, PORT env var, default 3000)
security:
  - bearerAuth: []
tags:
  - name: Execution
    description: >-
      Executes a Business Transaction through the complete Execution Trust
      pipeline
  - name: Transactions
    description: Business Transaction creation and retrieval
  - name: Verification
    description: Deterministic verification of an Execution Trust Record
  - name: Receipts
    description: Cryptographically signed Execution Trust Receipts
  - name: Trust Records
    description: Execution Trust Record retrieval
  - name: Replay
    description: Deterministic replay of a recorded Execution Trust Record
  - name: Policies
    description: Policy existence/readability check
  - name: Policy Governance
    description: Maker-checker proposal, listing, approval, and rejection of policy changes
  - name: Refusal Records
    description: >-
      Durable, signed evidence that a policy decision rejected a transaction
      (RFC-0021)
  - name: Audit
    description: >-
      Signed caller-authentication audit events, independently
      third-party-verifiable
  - name: System
    description: Operational endpoints
paths:
  /keys/{keyId}:
    get:
      tags:
        - System
      summary: Fetch a public signing key for independent, offline verification
      description: >
        Deliberately unauthenticated, like GET /audit/verify and GET
        /refusal/verify. A third party (regulator, auditor, customer tool)
        fetching the key it needs to independently verify a signature cannot be
        required to already hold a Parmana credential to reach it. Returns the
        current or any still-retained historical key's public half; a keyId
        whose private key was rotated away from is still resolvable here as long
        as its files were not deleted. See
        packages/crypto/src/OfflineVerifier.ts (and its Python counterpart,
        python/parmana/crypto/ offline_verifier.py) for a reference verifier
        that consumes exactly this response's `pem` field with zero further
        network calls.
      operationId: getKey
      parameters:
        - name: keyId
          in: path
          required: true
          schema:
            type: string
      responses:
        '200':
          description: The requested public key.
          content:
            application/json:
              schema:
                type: object
                required:
                  - keyId
                  - algorithm
                  - use
                  - pem
                properties:
                  keyId:
                    type: string
                  algorithm:
                    type: string
                    description: >
                      The key's actual algorithm, derived from the key material
                      itself (asymmetricKeyType), not a global config value.
                  use:
                    type: string
                    enum:
                      - sig
                  pem:
                    type: string
                    description: PEM-encoded SPKI public key (RFC 7468).
                  jwk:
                    type: object
                    description: >
                      Node's native JWK export for this key's algorithm, when
                      available. Ed25519 exports as kty "OKP"; ML-DSA-65 exports
                      as kty "AKP" (the IETF JOSE/COSE key type for ML-DSA, not
                      an identifier this codebase invented). Omitted, not null,
                      when unavailable.
        '404':
          description: No key exists for the given keyId.
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >
        Caller API key issued by scripts/generate-api-key.ts. Sent as
        Authorization: Bearer <key>. Verified against a stored SHA-256 hash in
        constant time by packages/api/src/auth/StaticKeyAuthenticator.ts.
        Required on every route not listed as exempt in this document's
        top-level description. See /api-reference/authentication.

````