---
title: "Cielo API changes, deprecations and deadlines | Harbyn"
description: "Cielo: 0 upcoming deadlines and 2 recorded changes as of 2026-10-25, each with its source."
canonical: "https://harbyn.com/vendors/cielo"
last-updated: 2026-10-07
---

# Cielo: API changes and deadlines

Markdown version of <https://harbyn.com/vendors/cielo>.

Payments. 0 upcoming deadlines, 2 recorded changes. Every entry cites the Cielo page we read it from.

Alert-only: Harbyn tells you what changed and where, and never edits Cielo code for you.

## What we read

The Cielo pages and feeds our ingestion visits, politely and on a schedule.

- **Changelog**: <https://docs.cielo.com.br/ecommerce-cielo/changelog.rss>
- **Changelog**: <https://docs.cielo.com.br/gateway/changelog.rss>

## What the scanner looks for

How `harbyn scan` recognises Cielo in a repository, on your machine. Nothing leaves it.

- **API hosts**: `api.cieloecommerce.cielo.com.br`, `apiquery.cieloecommerce.cielo.com.br`, `apisandbox.cieloecommerce.cielo.com.br`, `apiquerysandbox.cieloecommerce.cielo.com.br`

## Upcoming deadlines

No upcoming Cielo deadline in the feed right now.

## Change history

Newest first, by the date Cielo announced it. This is the archive: past changes are not warnings, and changes we recorded after they took effect are marked as such.

### October 2026

- Oct 7, 2026, Breaking change: [TransactionLinkId (TLID) required on Mastercard merchant-initiated transactions from October 23, 2026](https://harbyn.com/changes/cielo/2026-10-07-tlid-obrigatorio-para-transacoes-mit-mastercard.md) (effective Oct 23, 2026)
- Oct 2, 2026, Breaking change: [IssuerTransactionId now required for Elo recurring, incremental and reauthorized transactions](https://harbyn.com/changes/cielo/2026-10-02-issuertransactionid-obrigatorio-para-elo.md)