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

# Retrieve Certificate Registration URL

> Issues a URL where the supplier can register a certificate.

Usage examples: [Delegated issuance](/en/api-introduction/usecase-delegated) | [Simple-approval reverse issuance](/en/api-introduction/usecase-reverse-simple)




## OpenAPI

````yaml /openapi.en.yaml get /v1/suppliers/{supplierKey}/certificates/url
openapi: 3.1.0
info:
  title: Bolta API
  description: >
    The Bolta e-tax invoice API. [API Overview](/en/api-introduction/overview) |
    [Authentication guide](/en/api-introduction/authentication) | [Use
    cases](/en/api-introduction/usecase-b2b)
  version: 1.0.0
servers:
  - url: https://xapi.bolta.io
    description: Bolta API server
security:
  - basicAuth: []
tags:
  - name: Tax Invoice
    description: >
      Issue and manage e-tax invoices. [Calculating the issuance
      amount](/en/api-introduction/issuance-guide) | [Amendment
      types](/en/api-introduction/amendment-guide)
  - name: Reverse Issuance
    description: >
      Request and manage reverse issuance of e-tax invoices. [Email-approval
      reverse issuance](/en/api-introduction/usecase-reverse-email) |
      [Simple-approval reverse
      issuance](/en/api-introduction/usecase-reverse-simple)
  - name: Cash Receipt
    description: >
      Issue, cancel, and check the status of cash receipts. Issuance and
      cancellation are asynchronous. Check the final result via webhook or the
      status API. [Cash receipt guide](/en/api-introduction/cash-receipt-guide)
      | [Webhook events](/en/api-introduction/webhook-events)
  - name: Supplier
    description: >
      Register and manage the supplier (issuer) that issues tax invoices.
      [Glossary](/en/api-introduction/glossary) | [Delegated
      issuance](/en/api-introduction/usecase-delegated)
  - name: Certificate
    description: >
      Register and manage the supplier's certificate. [Authentication
      guide](/en/api-introduction/authentication)
paths:
  /v1/suppliers/{supplierKey}/certificates/url:
    get:
      tags:
        - Certificate
      summary: Retrieve Certificate Registration URL
      description: >
        Issues a URL where the supplier can register a certificate.


        Usage examples: [Delegated
        issuance](/en/api-introduction/usecase-delegated) | [Simple-approval
        reverse issuance](/en/api-introduction/usecase-reverse-simple)
      parameters:
        - name: supplierKey
          in: path
          description: Supplier (issuer) identification key
          required: true
          example: SupplierKey_bf8paz
          schema:
            type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                type: object
                properties:
                  url:
                    type: string
                required:
                  - url
          headers: {}
        '403':
          description: >
            supplierKey authorization failed. The `code` in the response is
            `FORBIDDEN`. Returned when the supplierKey does not exist, belongs
            to another partner, or was not issued with the API key you are
            using. A supplierKey is issued per API key, so if you issued a new
            API key, register the supplierKey again with that key.
            [Authentication guide](/en/api-introduction/authentication)
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      deprecated: false
components:
  schemas:
    ErrorResponse:
      type: object
      description: The error response returned when an API request fails
      properties:
        code:
          type: string
          description: Error type identifier
        message:
          type: string
          description: Error description
      required:
        - code
        - message
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: >-
        Base64-encode your API key and pass it. Enter the API key as the
        username and leave the password empty.

````