---
title: "Changes to Market fails-to-deliver leaderboard (latest SEC period)"
method: GET
path: "/api/v1/short-side/fails-to-deliver"
---

# Changes to Market fails-to-deliver leaderboard (latest SEC period)

`GET /api/v1/short-side/fails-to-deliver`

> Every recorded change to this operation, newest first.
> 50 revisions in range; 1 not diffed.

## Timeline

Changed in 6 of 50 revisions.

- **2026-10-29** `60c36260fbc6`: 4 breaking, 9 warning
- **2026-09-13** `d2472ec2cf81`: 1 info
- **2026-09-09** `4f8853a61440`: 1 info
- **2026-09-01** `328d061c12ca`: 3 info
- **2026-08-28** `560e8847c7b3`: 10 breaking
- **2026-08-08** `4c4530760ba1`: 12 info

## Changes

- **2026-10-29** `60c36260fbc6`: 4 breaking, 9 warning
  - added `#/components/schemas/UpstreamErrorResponse, subschema #1` to the response body `oneOf` list for the response status `503`
  - the response's body type changed from `object` to no type for status `503`
  - removed the required property `error` from the response with the `429` status
  - removed the required property `error` from the response with the `503` status
  - removed the optional property `code` from the response with the `429` status
  - removed the optional property `code` from the response with the `503` status
  - removed the optional property `detail` from the response with the `503` status
  - removed the optional property `hint` from the response with the `429` status
  - removed the optional property `hint` from the response with the `503` status
  - removed the optional property `plan` from the response with the `429` status
  - removed the optional property `plan` from the response with the `503` status
  - removed the optional property `reason` from the response with the `429` status
  - removed the optional property `reason` from the response with the `503` status
  - …this revision’s changelog is incomplete
- **2026-09-13** `d2472ec2cf81`: 1 info
  - added the non-success response with the status `500`
- **2026-09-09** `4f8853a61440`: 1 info
  - added the optional property `meta/stale_since` to the response with the `200` status
- **2026-09-01** `328d061c12ca`: 3 info
  - added the optional property `meta/data_age_days` to the response with the `200` status
  - added the optional property `meta/notes` to the response with the `200` status
  - added the optional property `meta/period` to the response with the `200` status
- **2026-08-28** `560e8847c7b3`: 10 breaking
  - the response property `data/count` became optional for the status `200`
  - the response property `data/latest_period` became optional for the status `200`
  - the response property `data/latest_settlement_date` became optional for the status `200`
  - the response property `data/symbol_count` became optional for the status `200`
  - the response property `data/top_fails` became optional for the status `200`
  - response property `data/count` list-of-types was widened by adding types `null and number` to media type `application/json` of response `200`
  - response property `data/latest_period` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `data/latest_settlement_date` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
  - response property `data/symbol_count` list-of-types was widened by adding types `null and number` to media type `application/json` of response `200`
  - response property `data/top_fails` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
- **2026-08-08** `4c4530760ba1`: 12 info
  - added the optional property `code` to the response with the `401` status
  - added the optional property `code` to the response with the `429` status
  - added the optional property `code` to the response with the `503` status
  - added the optional property `hint` to the response with the `401` status
  - added the optional property `hint` to the response with the `429` status
  - added the optional property `hint` to the response with the `503` status
  - added the optional property `plan` to the response with the `401` status
  - added the optional property `plan` to the response with the `429` status
  - added the optional property `plan` to the response with the `503` status
  - added the optional property `reason` to the response with the `401` status
  - added the optional property `reason` to the response with the `429` status
  - added the optional property `reason` to the response with the `503` status

---

[Operation](https://skmtc.dev/sugra/apis/sugra-api/docs/api/v1/short-side/fails-to-deliver/get.md) - [API](https://skmtc.dev/sugra/apis/sugra-api.md) - [Page](https://skmtc.dev/sugra/apis/sugra-api/changes/api/v1/short-side/fails-to-deliver/get)