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

# Alternatives by procurement objective

> Set include_evidence=true for audit evidence (Intelligence).



## OpenAPI

````yaml /openapi.json post /v1/parts/alternatives
openapi: 3.1.0
info:
  title: PartGenie Catalog & Intelligence API
  version: 1.0.0
  description: |
    REST API for Catalog (SKU A) and Intelligence (SKU B).
    Observed market data only — not landed quotes or order execution.
    Auth: OAuth2 client_credentials or Bearer `pg_test_` / `pg_live_` keys.
    Metering: part-return + live-offer monthly quotas; 429 when exceeded.
  contact:
    url: https://developers.partgenie.ai
servers:
  - url: https://api.partgenie.ai
    description: Production
security:
  - BearerAuth: []
  - OAuth2ClientCredentials: []
tags:
  - name: Catalog
    description: SKU A — lookup, search, batch, part, offers
  - name: Intelligence
    description: SKU B — resolve, alternatives, BOM, evidence
  - name: Account
paths:
  /v1/parts/alternatives:
    post:
      tags:
        - Intelligence
      summary: Alternatives by procurement objective
      description: Set include_evidence=true for audit evidence (Intelligence).
      operationId: findAlternatives
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AlternativesRequest'
      responses:
        '200':
          description: Alternatives list
        '403':
          description: Intelligence plan required
components:
  schemas:
    AlternativesRequest:
      type: object
      properties:
        mpn:
          type: string
        part_id:
          type: string
        objective:
          type: string
          enum:
            - drop_in
            - functional
            - cost_down
            - availability
            - domestic_replacement
            - lifecycle
        constraints:
          type: array
          items:
            type: string
        limit:
          type: integer
          minimum: 1
          maximum: 20
          default: 8
        include_evidence:
          type: boolean
          default: false
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      description: pg_test_… / pg_live_… or OAuth access token (pg_at_…)
    OAuth2ClientCredentials:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://developers.partgenie.ai/oauth/token
          scopes: {}

````

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