Back to HTTP Status Guides
4xx Client errors
Last updated Sep 22, 2021

426 - Upgrade Required

Benjamin Bouchet
Get your free
API
key now
4.8 from 1,863 votes
See why the best developers build on Abstract
START FOR FREE
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
No credit card required

The HTTP Status Code 426 means that the client should switch to a different protocol such as TLS/1.0, as given in the Upgrade header field.‍

Additional Links and Codes Related to Status Code 426

410
Gone
431
Request Header Fields Too Large
307
Temporary Redirect
421
Misdirected Request
208
Already Reported
417
Expectation Failed
Get your free
API
key now
4.8 from 1,863 votes
See why the best developers build on Abstract
START FOR FREE
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
No credit card required
abstract
APIs tO LOOK UP
Weather APIMarket Data APIExchange Rate API
IP Geolocation APIPublic Holidays APICompany Enrichment APITime, Date, Timezone APILanguage Translation API
APIs tO CREATE
User Avatar APIWeb Scraping APILink Shortener API
Image Processing APIWebsite Screenshot API
APIs tO VALIDATE
IBAN Validation APIEmail Validation APIPhone Validation API
VAT Validation & Rates API
RESOURCES
API GlossaryFull API ListAPI Guides & TipsEmail Regex GuideWhat's My IP Address?HTTP Status Code Guide
IntegrationsAboutContactIntegrationsLegalGDPR & CCPA
Status:
All systems normal
Abstract CSVAbstract PDFAbstract FilesAbstract Images
@2024 Abstract API Inc