---
title: "Changes to Get Agent Well Known"
method: GET
path: "/v1/agents/{agent_id}/a2a/well-known"
---

# Changes to Get Agent Well Known

`GET /v1/agents/{agent_id}/a2a/well-known`

> Every recorded change to this endpoint, newest first.

## Timeline

Changed in 3 of 22 revisions.

- **2026-07-08** `8940d7f77282` — 1 breaking, 3 warning, 3 info
- **2026-06-18** `dad98bb65260` — 2 info
- **2026-03-30** `e9c153221160` — 1 breaking, 2 warning, 4 info

## Changes

- **2026-07-08** `8940d7f77282` — 1 breaking, 3 warning, 3 info
  - removed the required property `url` from the response with the `200` status
  - removed the optional property `capabilities/stateTransitionHistory` from the response with the `200` status
  - removed the optional property `protocolVersion` from the response with the `200` status
  - removed the optional property `supportsAuthenticatedExtendedCard` from the response with the `200` status
  - added the optional property `skills/items/securityRequirements` to the response with the `200` status
  - the response property `supportedInterfaces` became required for the status `200`
  - response property `supportedInterfaces` list-of-types was narrowed by removing types `null` from media type `application/json` of response `200`
- **2026-06-18** `dad98bb65260` — 2 info
  - added the optional property `capabilities/extendedAgentCard` to the response with the `200` status
  - added the optional property `supportedInterfaces` to the response with the `200` status
- **2026-03-30** `e9c153221160` — 1 breaking, 2 warning, 4 info
  - removed the required property `supportedInterfaces` from the response with the `200` status
  - removed the optional property `capabilities/extendedAgentCard` from the response with the `200` status
  - removed the optional property `skills/items/securityRequirements` from the response with the `200` status
  - added the optional property `capabilities/stateTransitionHistory` to the response with the `200` status
  - added the optional property `protocolVersion` to the response with the `200` status
  - added the optional property `supportsAuthenticatedExtendedCard` to the response with the `200` status
  - added the required property `url` to the response with the `200` status

---

[Operation](https://skmtc.dev/agentarea/apis/agentarea-api/docs/v1/agents/:agent_id/a2a/well-known/get.md) · [API](https://skmtc.dev/agentarea/apis/agentarea-api.md) · [Page](https://skmtc.dev/agentarea/apis/agentarea-api/changes/v1/agents/:agent_id/a2a/well-known/get)