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

# Lock an FX quote for the buyer to confirm on-ramp against (10-min TTL).



## OpenAPI

````yaml https://api.caratuva.com/docs-json post /v1/public/invoices/{publicId}/fx-quote
openapi: 3.0.0
info:
  title: Caratuva API
  description: >-
    Cross-border B2B payments. Fiat on-ramp → USDC → PIX off-ramp.


    Every request runs in **test** or **live** mode on this single host — there
    is no separate sandbox URL. API keys carry the mode in their prefix
    (`pk_test_…` / `pk_live_…`); dashboard JWTs start in test and re-mint via
    `POST /v1/auth/switch-mode`. Test mode runs the full pipeline against a
    sandbox payment instance (KYB/KYC auto-approve, no real money); live runs on
    real rails and requires approved KYB. Test and live data are fully isolated.
    Check readiness with `GET /v1/onboarding/status`.
  version: 1.0.0
  contact: {}
servers: []
security: []
tags: []
paths:
  /v1/public/invoices/{publicId}/fx-quote:
    post:
      tags:
        - fx-quotes
      summary: Lock an FX quote for the buyer to confirm on-ramp against (10-min TTL).
      operationId: FxQuotesController_create
      parameters:
        - name: publicId
          required: true
          in: path
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateFxQuoteDto'
      responses:
        '201':
          description: Locked FX quote
components:
  schemas:
    CreateFxQuoteDto:
      type: object
      properties: {}

````