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

# Get a signing URL for a signature transaction

> Get a short-lived signing URL that can be used to start a signing session.



## OpenAPI

````yaml /api-reference/signatures/openapi.yaml get /v2/transactions/{signatureTransactionId}/signing-url
openapi: 3.0.0
info:
  title: Signatures API
  description: >-
    The Signatures API lets you create and manage signature requests and
    signature transactions, and drive documents through the signing and
    notarization process. All endpoints are authenticated with a bearer JWT.
  version: 2.0.0
  contact:
    name: Slate API Support
    email: api-support@slate.inc
    url: https://slate.inc
servers:
  - url: https://api.slate.inc/signatures
    description: Production
  - url: https://api.uat.slate.inc/signatures
    description: UAT (staging)
security:
  - bearerAuth: []
paths:
  /v2/transactions/{signatureTransactionId}/signing-url:
    get:
      summary: Get a signing URL for a signature transaction
      description: >-
        Get a short-lived signing URL that can be used to start a signing
        session.
      operationId: getV2SignaturesTransactionsSignatureTransactionIdSigningUrl
      parameters:
        - in: path
          name: signatureTransactionId
          required: true
          schema:
            type: string
            format: uuid
      responses:
        '200':
          description: Signing session URL obtained.
          content:
            application/json:
              schema:
                type: object
                required:
                  - signingUrl
                properties:
                  signingUrl:
                    type: string
                    description: The generated short-lived signing URL.
        '400':
          description: Invalid request parameters.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Unauthorized or invalid permissions.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '404':
          description: >-
            Signature transaction not found, or the token does not have
            permission.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '500':
          description: Unexpected internal error.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    Error:
      type: object
      required:
        - message
      properties:
        message:
          type: string
          description: A human-readable error message.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >-
        Cognito-issued JWT access token. Send it as `Authorization: Bearer
        <token>`.

````