> ## 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.

# Register Supplier

> Registers supplier (issuer) information and obtains a `supplierKey`. Required for delegated issuance and reverse issuance.

Usage examples: [Delegated issuance](/en/api-introduction/usecase-delegated) | [Reverse issuance](/en/api-introduction/usecase-reverse-email)




## OpenAPI

````yaml /openapi.en.yaml post /v1/suppliers
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:
    post:
      tags:
        - Supplier
      summary: Register Supplier
      description: >
        Registers supplier (issuer) information and obtains a `supplierKey`.
        Required for delegated issuance and reverse issuance.


        Usage examples: [Delegated
        issuance](/en/api-introduction/usecase-delegated) | [Reverse
        issuance](/en/api-introduction/usecase-reverse-email)
      parameters: []
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Supplier'
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                type: object
                properties:
                  supplierKey:
                    $ref: '#/components/schemas/ClientKey'
                    description: Supplier (issuer) identification key
                  identificationNumber:
                    $ref: '#/components/schemas/BusinessRegistrationNumber'
                    description: Business registration number
                  taxRegistrationId:
                    $ref: '#/components/schemas/TaxRegistrationId'
                    description: Sub-business place code
                  organizationName:
                    $ref: '#/components/schemas/OrganizationName'
                    description: Organization name
                  representativeName:
                    $ref: '#/components/schemas/RepresentativeName'
                    description: Representative name
                  certificate:
                    type: object
                    properties:
                      issuedAt:
                        type: string
                        description: Certificate issuance timestamp (ISO 8601)
                      expiresAt:
                        type: string
                        description: Certificate expiration timestamp (ISO 8601)
                    required:
                      - issuedAt
                      - expiresAt
                required:
                  - supplierKey
                  - identificationNumber
                  - organizationName
                  - representativeName
          headers: {}
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      deprecated: false
components:
  schemas:
    Supplier:
      type: object
      description: >-
        Information about the supplier (issuer) that issues tax invoices. This
        is the request body of the Register Supplier API (POST /v1/suppliers).
      properties:
        identificationNumber:
          $ref: '#/components/schemas/BusinessRegistrationNumber'
          description: Business registration number
        taxRegistrationId:
          $ref: '#/components/schemas/TaxRegistrationId'
          description: Sub-business place code
        organizationName:
          $ref: '#/components/schemas/OrganizationName'
          description: Organization name
        representativeName:
          $ref: '#/components/schemas/RepresentativeName'
          description: Representative name
      required:
        - identificationNumber
        - representativeName
        - organizationName
    ClientKey:
      type: string
      title: Supplier (issuer) identification key
      description: Supplier (issuer) identification key
    BusinessRegistrationNumber:
      type: string
      title: Business registration number
      description: '10 digits without hyphens (-). Pattern: `^\d{10}$`'
      pattern: ^\d{10}$
      examples:
        - '1234567890'
    TaxRegistrationId:
      type: string
      title: Sub-business place code
      description: '4 digits, excluding `0000`. Pattern: `^(?!0{4})\d{4}$`'
      pattern: ^(?!0{4})\d{4}$
      examples:
        - '0001'
        - '0002'
      minLength: 4
      maxLength: 4
    OrganizationName:
      type: string
      title: Organization name
      description: Organization name
      maxLength: 70
      minLength: 1
    RepresentativeName:
      type: string
      title: Representative name
      description: Representative name
      minLength: 1
      maxLength: 30
    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.

````