---
title: "Changes to Participate in an exchange. Posting an empty body will start the exchange or return what the exchange is expecting to complete the next step. Posting a Verifiable Presentation Request will result in either a 4xx error or one of the following - 1. one or more Verifiable Presentations or 2. a Verifiable Presentation Request that conforms to the client's request. If one or more Verifiable Presentations are sent, an additional Verifiable Presentation Request may also be sent to continue the exchange."
method: POST
path: "/workflows/{localWorkflowId}/exchanges/{localExchangeId}"
---

# Changes to Participate in an exchange. Posting an empty body will start the exchange or return what the exchange is expecting to complete the next step. Posting a Verifiable Presentation Request will result in either a 4xx error or one of the following - 1. one or more Verifiable Presentations or 2. a Verifiable Presentation Request that conforms to the client's request. If one or more Verifiable Presentations are sent, an additional Verifiable Presentation Request may also be sent to continue the exchange.

`POST /workflows/{localWorkflowId}/exchanges/{localExchangeId}`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 8 of 67 revisions.

- **2026-07-13** `1005da1718e7` — 1 breaking, 1 info
- **2026-07-12** `fc436fbfba78` — 1 breaking, 1 info
- **2026-07-12** `bbb07fe41f28` — 2 breaking, 2 info
- **2026-03-17** `17b15e1d25a1` — 1 info
- **2026-03-17** `283c57012d6f` — 1 breaking, 1 info
- **2026-03-17** `736d8da58f25` — 3 breaking, 2 info
- **2025-09-23** `466d8897863d` — 1 info
- **2025-09-23** `474599254bb9` — 1 breaking

## Changes

- **2026-07-13** `1005da1718e7` — 1 breaking, 1 info
  - added `subschema #1, subschema #5` to the response body `oneOf` list for the response status `200`
  - removed `subschema #4, subschema #5` from the response body `oneOf` list for the response status `200`
- **2026-07-12** `fc436fbfba78` — 1 breaking, 1 info
  - added `subschema #4, subschema #5` to the response body `oneOf` list for the response status `200`
  - removed `subschema #1, subschema #5` from the response body `oneOf` list for the response status `200`
- **2026-07-12** `bbb07fe41f28` — 2 breaking, 2 info
  - removed `subschema #2, subschema #3, subschema #4` from the request body `oneOf` list
  - added `subschema #1, subschema #2, subschema #3, subschema #4, subschema #5` to the response body `oneOf` list for the response status `200`
  - added `subschema #2, subschema #3, subschema #4, subschema #5` to the request body `oneOf` list
  - removed `subschema #1, subschema #2, subschema #3, subschema #4` from the response body `oneOf` list for the response status `200`
- **2026-03-17** `17b15e1d25a1` — 1 info
  - added the optional property `oneOf[subschema #4]/referenceId` to the response with the `200` status
- **2026-03-17** `283c57012d6f` — 1 breaking, 1 info
  - added `subschema #4` to the response body `oneOf` list for the response status `200`
  - added `subschema #4` to the request body `oneOf` list
- **2026-03-17** `736d8da58f25` — 3 breaking, 2 info
  - removed `subschema #1, subschema #2` from the request body `oneOf` list
  - the request's body type changed from no type to `object`
  - added `subschema #1, subschema #2, subschema #3` to the response body `oneOf` list for the response status `200`
  - added `subschema #1, subschema #2, subschema #3` to the request body `oneOf` list
  - removed `subschema #1, subschema #2, subschema #3` from the response body `oneOf` list for the response status `200`
- **2025-09-23** `466d8897863d` — 1 info
  - added `subschema #1, subschema #2` to the request body `oneOf` list
- **2025-09-23** `474599254bb9` — 1 breaking
  - removed `subschema #1, subschema #2` from the request body `oneOf` list

---

[Operation](https://skmtc.dev/w3c/apis/verifiable-credential-api-for-lifecycle-management/docs/workflows/:localWorkflowId/exchanges/:localExchangeId/post.md) · [API](https://skmtc.dev/w3c/apis/verifiable-credential-api-for-lifecycle-management.md) · [Page](https://skmtc.dev/w3c/apis/verifiable-credential-api-for-lifecycle-management/changes/workflows/:localWorkflowId/exchanges/:localExchangeId/post)