# Simulate Fund a Payment run

Simulate funding a payment run using a linked account.
*This endpoint will only function in Sandbox and should not be used in the Live environment.*

Endpoint: POST /simulate/v1/payment_runs/{payment_run_id}/fund_group/{reference}
Version: v1
Security: apiKey

## Security:

  - `apiKey` (unknown)
    apiKey in header api-key

## Path parameters:

  - `payment_run_id` (string, required)

  - `reference` (string, required)

## Response 201:

  - `201` (unknown)
    Success

## Response 400:

  - `400` (unknown)
    Bad Request Error - Your request is invalid.

## Response 400 fields (application/json):

  - `message` (string)
    When present helps to identify and fix the problem.

  - `syntaxErrors` (object)
    Is returned as part of an HTTP error response whenever a syntax error is detected. A list of the fields together with their syntax error will be provided.

  - `syntaxErrors.invalidFields` (array)

  - `syntaxErrors.invalidFields.params` (array)

  - `syntaxErrors.invalidFields.fieldName` (string)

  - `syntaxErrors.invalidFields.error` (string)
    Enum: "REQUIRED", "HAS_TEXT", "REQUIRES", "SIZE", "RANGE", "IN", "NOT_IN", "REGEX", "EXACTLY", "AT_LEAST", "AT_MOST", "ALL_OR_NONE"

## Response 400 headers (application/json):

  - `request-ref` (string, required)
    A request identifier. Providing this reference when contacting our support team will help us investigate your query.

## Response 401:

  - `401` (unknown)
    Unauthorized - Your credentials or access token are invalid.

## Response 401 headers:

  - `request-ref` (string, required)
    A request identifier. Providing this reference when contacting our support team will help us investigate your query.

## Response 403:

  - `403` (unknown)
    Forbidden - Access to the requested resource or action is forbidden.

## Response 403 fields (application/json):

  - `errorCode` (string)
    Enum: "INSUFFICIENT_PERMISSIONS"

## Response 403 headers (application/json):

  - `request-ref` (string, required)
    A request identifier. Providing this reference when contacting our support team will help us investigate your query.

## Response 404:

  - `404` (unknown)
    Not found - The requested resource couldn't be found.

## Response 404 fields (application/json):

  - `code` (string)

  - `message` (string)

## Response 404 headers (application/json):

  - `request-ref` (string, required)
    A request identifier. Providing this reference when contacting our support team will help us investigate your query.

## Response 409:

  - `409` (unknown)
    Conflict

## Response 409 fields (application/json):

  - `errorCode` (string)
    Enum: "BUYER_ID_INVALID", "UNSUPPORTED_CURRENCY"

## Response 500:

  - `500` (unknown)
    Internal Server Error - There is a problem with the server. Please try again later.

## Response 500 headers:

  - `request-ref` (string, required)
    A request identifier. Providing this reference when contacting our support team will help us investigate your query.

## Response 503:

  - `503` (unknown)
    Service Unavailable - We're temporarily offline for maintenance. Please try again later.

## Response 503 headers:

  - `request-ref` (string, required)
    A request identifier. Providing this reference when contacting our support team will help us investigate your query.

## Response default:

  - `default` (unknown)
    Error

## Response default fields (application/json):

  - `code` (string)

  - `message` (string)