---
title: "Initiate a mass payment"
method: POST
path: "/mass-payments"
tags: ["mass payments"]
---

# Initiate a mass payment

`POST /mass-payments`

Create a mass payment containing up to 5,000 individual payment items from a Dwolla Main Account or Verified Customer funding source. Supports optional metadata, correlation IDs for traceability, deferred processing, and expedited transfer options including same-day ACH clearing. Returns the location of the created mass payment resource with a unique identifier for tracking and management.

## Headers

- `Accept` 'application/vnd.dwolla.v1.hal+json', required
- `Idempotency-Key` string

## Request body

- object
  - `_links` object, required
    - `source` object
      - `href` string
  - `items` object[], required
    - `_links` object
      - `destination` object
        - `href` string
    - `amount` TransferAmount
      - `value` string, required
      - `currency` string, required
    - `processingChannel` object
      - `destination` string
    - `metadata` object
    - `clearing` object
      - `destination` string
    - `achDetails` object
      - `destination` object
        - `addenda` object
          - `values` string[]
    - `correlationId` string
  - `status` string
  - `achDetails` object
    - `source` object
      - `addenda` object
        - `values` string[]
  - `clearing` object
    - `source` string
  - `metadata` object
  - `correlationId` string

## Response `201`

created

## Other responses

- `400` — Bad Request
- `403` — Forbidden

## Changes

- **2025-10-01** `df0692083893` — 1 info
  - added the new optional `header` request parameter `Idempotency-Key`
- **2025-06-06** `231d0268586b` — 1 breaking, 4 info
  - request body became required
  - api tag `mass payments` added
  - api tag `massPayments` removed
  - added the non-success response with the status `400`
  - …1 more
- **2025-05-30** `9c0a7a570129` — 2 info
  - api tag `massPayments` added
  - api tag `mass payments` removed
- **2025-05-23** `4c8b16e05918` — 1 breaking
  - added the new required `header` request parameter `Accept`

[Change history](https://skmtc.dev/dwolla/apis/dwolla-api/changes/mass-payments/post.md)

---

[API](https://skmtc.dev/dwolla/apis/dwolla-api.md) · [All operations](https://skmtc.dev/dwolla/apis/dwolla-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/dwolla/dwolla-api/revisions/0e13062ae3be/schema)