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OpenAPI Specification

openapi: 3.2.0
info:
  title: Klisten Agent Infrastructure Gate API
  version: 0.1.0
  description: Phase 1 API. Optional capabilities fail closed unless their runtime dependencies are configured. See health and capability discovery for this instance.
tags:
- name: Gate
paths:
  /v1/gate/check:
    post:
      operationId: checkGate
      security:
      - ApiKey: []
      x-required-scope: gate:check
      x-implementation-status: implemented
      responses:
        '200':
          description: Successful response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GateResponse'
        '400':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '409':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '413':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '503':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      parameters:
      - name: Idempotency-Key
        in: header
        required: true
        schema:
          type: string
          minLength: 16
          maxLength: 128
          pattern: ^[A-Za-z0-9._:-]+$
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/GateRequest'
      tags:
      - Gate
      summary: Check gate
      x-summary-source: derived
  /v1/gate/check-paid:
    post:
      operationId: checkPaidGate
      security:
      - ApiKey: []
      x-required-scope: gate:check
      x-implementation-status: implemented
      responses:
        '200':
          description: Successful response.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/GateResponse'
        '400':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '403':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '409':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '413':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '422':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '503':
          description: Request denied or dependency unavailable.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      description: Prepaid evaluation costs 1000 micro-USD ($0.001) for every valid signed outcome, including deny, review and unknown. Replaying the same request with its original API key does not charge again. Operator onboarding is required.
      parameters:
      - name: Idempotency-Key
        in: header
        required: true
        schema:
          type: string
          minLength: 16
          maxLength: 128
          pattern: ^[A-Za-z0-9._:-]+$
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/GateRequest'
      tags:
      - Gate
      summary: Check paid gate
      x-summary-source: derived
components:
  schemas:
    GateRequest:
      $schema: https://json-schema.org/draft/2020-12/schema
      type: object
      properties:
        service_id:
          type: string
          pattern: ^svc_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
        tool_name:
          type: string
          minLength: 1
          maxLength: 128
        expected_fingerprint:
          type: string
          pattern: ^sha256:[a-f0-9]{64}$
        policy_version:
          type: string
          minLength: 1
          maxLength: 64
        agent_id:
          type: string
          pattern: ^agt_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
      required:
      - service_id
      - tool_name
      - expected_fingerprint
      - policy_version
      additionalProperties: false
    GateResponse:
      $schema: https://json-schema.org/draft/2020-12/schema
      type: object
      properties:
        decision_id:
          type: string
          pattern: ^dec_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
        service_id:
          type: string
          pattern: ^svc_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
        tool_name:
          type: string
        decision:
          type: string
          enum:
          - allow
          - deny
          - review
          - unknown
        risk_score:
          anyOf:
          - type: integer
            minimum: 0
            maximum: 100
          - type: 'null'
        reasons:
          type: array
          items:
            type: string
        observation_id:
          anyOf:
          - type: string
            pattern: ^obs_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
          - type: 'null'
        observed_fingerprint:
          anyOf:
          - type: string
            pattern: ^sha256:[a-f0-9]{64}$
          - type: 'null'
        policy_version:
          type: string
        ruleset_version:
          type: string
        evidence_hash:
          type: string
          pattern: ^sha256:[a-f0-9]{64}$
        evaluated_at:
          type: string
          format: date-time
          pattern: ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d\.\d{3}(?:Z))$
        expires_at:
          type: string
          format: date-time
          pattern: ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d\.\d{3}(?:Z))$
        attestation_id:
          type: string
          pattern: ^att_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
        attestation:
          type: object
          properties:
            payload:
              type: object
              properties:
                schema_version:
                  type: string
                  const: christine.attestation.v1
                attestation_id:
                  type: string
                  pattern: ^att_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
                type:
                  type: string
                  const: toolguard_gate
                issuer:
                  type: string
                  format: uri
                key_id:
                  type: string
                  minLength: 1
                  maxLength: 128
                org_id:
                  type: string
                  pattern: ^org_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
                decision_id:
                  type: string
                  pattern: ^dec_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
                subject:
                  type: object
                  properties:
                    service_id:
                      type: string
                      pattern: ^svc_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
                    tool_name:
                      type: string
                      minLength: 1
                      maxLength: 128
                    expected_fingerprint:
                      type: string
                      pattern: ^sha256:[a-f0-9]{64}$
                    observed_fingerprint:
                      anyOf:
                      - type: string
                        pattern: ^sha256:[a-f0-9]{64}$
                      - type: 'null'
                  required:
                  - service_id
                  - tool_name
                  - expected_fingerprint
                  - observed_fingerprint
                  additionalProperties: false
                result:
                  type: string
                  enum:
                  - allow
                  - deny
                  - review
                  - unknown
                risk_score:
                  anyOf:
                  - type: integer
                    minimum: 0
                    maximum: 100
                  - type: 'null'
                reasons:
                  type: array
                  items:
                    type: string
                    pattern: ^[A-Z][A-Z0-9_]*$
                policy_version:
                  type: string
                  minLength: 1
                  maxLength: 128
                policy_hash:
                  type: string
                  pattern: ^sha256:[a-f0-9]{64}$
                ruleset_version:
                  type: string
                  minLength: 1
                  maxLength: 128
                evidence_hash:
                  type: string
                  pattern: ^sha256:[a-f0-9]{64}$
                issued_at:
                  type: string
                  pattern: ^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$
                expires_at:
                  type: string
                  pattern: ^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$
              required:
              - schema_version
              - attestation_id
              - type
              - issuer
              - key_id
              - org_id
              - decision_id
              - subject
              - result
              - risk_score
              - reasons
              - policy_version
              - policy_hash
              - ruleset_version
              - evidence_hash
              - issued_at
              - expires_at
              additionalProperties: false
            signature:
              type: string
              pattern: ^[A-Za-z0-9_-]+$
          required:
          - payload
          - signature
          additionalProperties: false
        next_action:
          type: string
          enum:
          - execute_if_receipt_valid
          - contact_operator
          - request_scan
          - stop
        request_id:
          type: string
          pattern: ^req_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
      required:
      - decision_id
      - service_id
      - tool_name
      - decision
      - risk_score
      - reasons
      - observation_id
      - observed_fingerprint
      - policy_version
      - ruleset_version
      - evidence_hash
      - evaluated_at
      - expires_at
      - attestation_id
      - attestation
      - next_action
      - request_id
      additionalProperties: false
    Error:
      $schema: https://json-schema.org/draft/2020-12/schema
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
            request_id:
              type: string
              pattern: ^req_[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$
            retryable:
              type: boolean
          required:
          - code
          - message
          - request_id
          - retryable
          additionalProperties: false
      required:
      - error
      additionalProperties: false
  securitySchemes:
    ApiKey:
      type: http
      scheme: bearer
      bearerFormat: ck_live_<secret>
    SupabaseHuman:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Supabase access token for a verified Google user in the configured project. Agent API keys are not accepted.