openapi: 3.2.0
info:
  title: EQ Scoring Platform — Human-Likeness & AI Text Benchmark…
  description: Human-likeness scoring and AI text benchmark API.
  version: 1.0.0
tags:
- name: Bundle
paths:
  /api/bundle:
    post:
      summary: Buy Bundle
      description: 'Buy a prepaid bundle of basic-score credits at a discount.


        One x402 payment (SOL or USDC) buys the published number of credits,

        credited to the paying wallet. The response contains a SECRET

        `bundle_token` — store it; it is shown exactly once. Redeem credits by

        sending the `X-BUNDLE-TOKEN` header on POST /api/simulate (basic tier).

        Check remaining credits at GET /api/bundle/balance.


        ## Default x402 v2 payment flow


        1. **Quote** — POST /api/bundle with no payment header. Read the full

        HTTP **402** body and select the first `accepts` entry: Base USDC

        (`network: eip155:8453`).

        2. **Sign** — sign that entry''s exact EIP-3009

        `TransferWithAuthorization` fields. The wallet needs Base USDC but

        no ETH; the facilitator submits the authorization.

        3. **Build** — create the canonical x402 v2 payload using the full

        response''s `resource`, the selected entry as `accepted`, the signed

        `payload`, and `extensions` when present:


        ```json

        {"x402Version":2,

        "resource":{"url":"https://eqbuilder.dev/api/bundle"},

        "accepted":{"scheme":"exact","network":"eip155:8453","amount":"","payTo":"","asset":""},

        "payload":{"signature":"0x...65-byte EIP-712 signature...","authorization":{"from":"0xYourAddress","to":"0xPayToAddress","value":"","validAfter":"0","validBefore":"","nonce":"0x...32 random bytes..."}},

        "extensions":{}}

        ```


        4. **Retry once** — base64-encode the compact JSON and send it in

        `PAYMENT-SIGNATURE`. Success is HTTP 200 with the bundle and a

        `PAYMENT-RESPONSE` settlement receipt.


        If the paid request times out, preserve the error and any receipt.

        Confirm payment status before creating or replaying an authorization.


        ### Legacy compatibility


        Existing Solana and `X-PAYMENT` clients remain accepted. A legacy

        Solana proof still has this shape:


        ```json

        {"x402Version":2,"scheme":"exact","network":"solana","payload":{"signature":"5KtP...your tx signature...","payer":"9xQe...your wallet..."}}

        ```'
      operationId: buy_bundle_api_bundle_post
      parameters:
      - name: X-PAYMENT
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          description: x402 payment proof (same format as /api/simulate).
          title: X-Payment
        description: x402 payment proof (same format as /api/simulate).
      requestBody:
        content:
          application/json:
            schema:
              anyOf:
              - $ref: '#/components/schemas/BundlePayload'
              - type: 'null'
              title: Body
      responses:
        '200':
          description: Bundle purchased; response contains the SECRET bundle_token.
          content:
            application/json:
              schema: {}
        '402':
          description: Payment required (x402 payment-requirements body) or payment could not be verified.
        '409':
          description: Transaction signature already used (double-spend guard).
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Bundle
  /api/bundle/balance:
    get:
      summary: Bundle Balance
      description: Check remaining prepaid credits for a bundle token.
      operationId: bundle_balance_api_bundle_balance_get
      parameters:
      - name: X-BUNDLE-TOKEN
        in: header
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          description: Secret bundle token from POST /api/bundle.
          title: X-Bundle-Token
        description: Secret bundle token from POST /api/bundle.
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
      tags:
      - Bundle
components:
  schemas:
    BundlePayload:
      properties:
        tx_hash:
          type: string
          title: Tx Hash
          default: ''
        wallet_address:
          type: string
          title: Wallet Address
          default: ''
        referral_code:
          type: string
          title: Referral Code
          default: ''
        plan:
          type: string
          title: Plan
          default: bundle
      type: object
      title: BundlePayload
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError