Every Major API Deprecation in February 2026 (Breaking Changes You Can't Miss)

Adam — Tue, 17 Feb 2026 14:18:54 +0000

APIWatch Newsletter — Issue #002

Week of February 17, 2026

Breaking Changes & Deprecations You Need to Know

Welcome back to APIWatch. This week's big story: the OpenAI GPT-4o deadline hits TODAY, plus a wave of March deadlines are approaching fast.

Critical: Immediate Action Required

OpenAI API: GPT-4o Model Removal (Feb 17, 2026) — TODAY

The chatgpt-4o-latest model snapshot is being removed from the API today, February 17. If your application references this specific model, API calls will start failing.

Impact: High — applications using chatgpt-4o-latest will break
Action Required: Migrate to gpt-4o or a newer model variant immediately
Note: Other GPT-4o variants (GPT-4o mini, etc.) remain available

Read announcement

OpenAI Realtime API Beta Shutdown (Feb 27, 2026)

The Realtime API Beta will be deprecated and removed on February 27. If you're using WebSocket-based realtime completions through the beta endpoint, you have 10 days to migrate.

Impact: High — realtime streaming integrations will break
Action Required: Migrate to the stable Responses API or standard streaming endpoints
Deadline: February 27, 2026

OpenAI Deprecations

Adobe Workfront Integration Sunset (Feb 28, 2026)

Workfront for Google Workspace and Workfront for Salesforce integrations will stop functioning on February 28.

Impact: Medium — workflow automations between Workfront and Google/Salesforce will break
Action Required: Migrate to Workfront Automation and Integration (Fusion)

Adobe Workfront Q1 2026 Release Notes

Google Shopping API: Beta Migration Deadline (Feb 28, 2026)

Beta users of the Merchant API must complete their migration from Content API for Shopping by February 28. The final shutdown for all users is August 18, 2026 — but if you're in the beta, your deadline is 11 days away.

Impact: High for beta users — API calls will fail
Action Required: Complete migration to the new Merchant API
Final shutdown (all users): August 18, 2026

Migration Guide

Coming Soon: March Deadlines

Twilio REST API: Cipher Suite Changes (March 3, 2026)

Twilio is restricting which TLS cipher suites their REST API endpoints accept. Starting March 3, connections using unsupported cipher suites will be rejected.

Impact: Medium — API calls may fail silently if your HTTP client uses an older cipher suite
Action Required: Verify your HTTP client supports modern TLS cipher suites. Most modern libraries (Node 18+, Python 3.9+, Java 11+) are fine. Older runtimes may need updates.

Twilio Cipher Suite Update

Slack: New Rate Limits for conversations.history and conversations.replies (March 3, 2026)

Slack is introducing new rate limits for conversations.history and conversations.replies Web API methods for unlisted, distributed applications starting March 3.

Impact: Medium — apps making frequent history/reply lookups may get throttled
Action Required: Review your API call patterns and implement proper rate limit handling with backoff

Slack API Changelog

AWS Lambda: Node.js 18 & 16 Hard Stop (March 9, 2026)

Reminder: the hard stop for Node.js 18 and 16 Lambda runtimes is March 9 — three weeks away. After this date, you cannot update, redeploy, or modify any Lambda function using these runtimes.

Impact: Critical — existing functions continue running but become unmodifiable
Action Required: Upgrade to Node.js 20 or later
Why this matters: If a security patch is needed after March 9, you won't be able to deploy it without upgrading the runtime first.

Lambda Runtime Lifecycle

Azure API Management: Trusted Service Connectivity Retirement (March 15, 2026)

Azure is retiring trusted service connectivity for API Management gateway connections to Azure Storage, Key Vault, Service Bus, Event Hubs, and Container Registry on March 15.

Impact: High — API Management instances relying on trusted service connectivity will lose access to backend services
Action Required: Check Azure Advisor for impact assessment; update connectivity configuration to use managed identity or private endpoints

Azure APIM Breaking Change

Google Cloud Deployment Manager Shutdown (March 31, 2026)

Google Cloud Deployment Manager will be fully discontinued on March 31. All related APIs and management functions will stop working.

Impact: Critical — infrastructure-as-code deployments will break
Action Required: Migrate to Infrastructure Manager, Terraform, or Pulumi
Note: This affects the Deployment Manager API, not just the CLI

Deployment Manager Deprecation

Microsoft 365: External Access Tokens for Actionable Messages (March 31, 2026)

External access tokens for actionable messages in Microsoft 365 will be retired on March 31.

Impact: Medium — actionable email cards and adaptive cards using external tokens will stop functioning
Action Required: Transition to Microsoft Entra authentication

Notable Updates & New Features

OpenAI Responses API: WebSocket Optimization

OpenAI announced significant performance improvements for the Responses API via persistent WebSocket connections: 80% reduction in overhead per roundtrip, 30% reduction in per-token overhead, and 50% reduction in time-to-first-token.

Worth investigating if: You're making many sequential API calls or need low-latency streaming.

Anthropic Claude Opus 4.6: Adaptive Thinking

Anthropic released Claude Opus 4.6 with adaptive thinking (4 effort levels: low, medium, high, max) and 1M token context windows. Premium pricing applies for prompts exceeding 200K tokens.

Worth investigating if: You need deep reasoning over large documents or code repositories.

Anthropic Announcement

Salesforce Spring '26: Named Query API (GA)

Salesforce's Named Query API is now generally available. It allows defining custom SOQL queries as scalable REST API actions — effectively turning complex queries into simple API endpoints.

Worth investigating if: You maintain Salesforce integrations with complex query requirements.

Meta/Facebook: Social Plugin Removal Complete

As of February 10, Facebook Like and Comment button social plugins have stopped rendering. If you still have these embedded on your site, they now render as invisible 0x0 pixel elements.

Action Required: Remove deprecated plugin code to clean up your HTML and eliminate dead network requests.

On the Horizon (Q2 2026)

Platform	Change	Deadline
Twilio	Regional API domains deprecated	April 28, 2026
Slack	Classic apps shutdown	May 25, 2026
Cloudflare	DNS record type changes via API removed	June 30, 2026
Shopify	Scripts deprecated (migrate to Functions)	June 30, 2026
OpenAI	Assistants API removed	August 26, 2026
Google	Content API for Shopping final shutdown	August 18, 2026

By the Numbers

7 critical deadlines in the next 6 weeks
3 platforms with changes THIS WEEK (OpenAI, Meta, Atlassian)
Node.js 18 Lambda hard stop is 3 weeks away — audit now or lose the ability to patch later

Pro Tips

OpenAI model migrations: Don't just swap model names — test output quality. Newer models may produce different results that affect downstream logic.
TLS cipher suite changes (Twilio, March 3): Run openssl s_client -connect api.twilio.com:443 to verify your connection uses a supported cipher.
Lambda runtime upgrades: Use AWS Lambda Layers to minimize code changes when upgrading Node.js versions.

About APIWatch

APIWatch curates the most important API changes, deprecations, and updates from major platforms each week. We track over 50 developer platforms so you don't have to.

Want this delivered to your inbox? Sign up at apiwatch-landing.pages.dev

Found this useful? Forward to a teammate who might miss a critical API change.

Issue #002 — Week of February 17, 2026
Curated with care for busy developers

Forem: Adam