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OpenAPI Specification

openapi: 3.2.0
info:
  title: Hlido Recommendation Recommendations API
  version: wave4-v1
  description: 'Public REST surface for Hlido''s agent review corpus. Buyer agents call /v1/recommend with a free-text need + constraints and get a ranked shortlist with rationale + evidence URL. Free tier: 100 calls/day, top-1 results, no key. Paid: hlk_live_* Bearer.'
  contact:
    name: Hlido
    url: https://hlido.eu
    email: ankit@hlido.eu
  license:
    name: Proprietary — see https://hlido.eu/legal/
servers:
- url: https://hlido.eu/v1
  description: Production
tags:
- name: Recommendations
  description: Constraint-driven shortlist of reviewed agents.
paths:
  /recommend:
    post:
      summary: Constraint-driven shortlist
      tags:
      - Recommendations
      security:
      - bearerAuth: []
      - {}
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RecommendRequest'
      responses:
        '200':
          description: Ranked shortlist.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/RecommendResponse'
        '400':
          description: Invalid body.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Quota exceeded.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
      operationId: postRecommend
      x-operation-id-source: derived
components:
  schemas:
    RecommendRequest:
      type: object
      required:
      - need
      properties:
        need:
          type: string
          minLength: 3
          maxLength: 500
          description: Free-text description of the buyer's need.
        constraints:
          type: object
          properties:
            category:
              $ref: '#/components/schemas/Category'
            min_tier:
              $ref: '#/components/schemas/Tier'
            budget_eur:
              type: number
              description: Advisory only (surfaced in rationale, not used for filtering).
            languages:
              type: array
              items:
                type: string
              maxItems: 5
            deployment:
              type: string
              enum:
              - cloud
              - self-host
              - cli
              - web
              - api
              description: Advisory only.
          additionalProperties: false
        k:
          type: integer
          minimum: 1
          maximum: 25
          description: Default 3 for paid tiers; FORCED to 1 for free tier regardless of input.
      additionalProperties: false
    Error:
      type: object
      properties:
        error:
          type: string
          enum:
          - invalid_json
          - invalid_body
          - missing_field
          - quota_exceeded
          - unauthorized
          - invalid_api_key
          - configuration_error
          - internal_error
          - not_found
        request_id:
          type: string
      required:
      - error
    Category:
      type: string
      enum:
      - AI Agent
      - Coding
      - Customer Experience
      - Workflow & Automation
      - Infrastructure
      - Voice
      - Productivity
      - Image & Design
      - Frameworks & Eval
      - Specialized verticals
      - Chat & Companion
      - Research
      - Marketing & Content
    RecommendResponse:
      type: object
      properties:
        request_id:
          type: string
          pattern: ^req_[0-9a-f]{32}$
        model_version:
          type: string
          example: wave4-v1
        cached:
          type: boolean
        tier_note:
          type: string
          description: Present on free-tier responses only.
        results:
          type: array
          items:
            $ref: '#/components/schemas/RecommendResult'
      required:
      - request_id
      - model_version
      - cached
      - results
    Tier:
      type: string
      enum:
      - VITAL
      - STEADY
      - FADING
      - FLATLINE
    RecommendResult:
      type: object
      properties:
        slug:
          type: string
        name:
          type: string
        tier:
          $ref: '#/components/schemas/Tier'
        score:
          type: integer
          minimum: 0
          maximum: 100
          nullable: true
        category:
          $ref: '#/components/schemas/Category'
        rationale:
          type: string
        evidence_url:
          type: string
          format: uri
        score_url:
          type: string
          format: uri
      required:
      - slug
      - name
      - tier
      - score
      - category
      - rationale
      - evidence_url
      - score_url
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: hlk_live