Can an agent reach checkout?
10 sites · 4 agents · guest, no account · run 2026-09-22 · draft protocol t0.2-draft
Every agent got the same task on the same site: find a fixed item, add it, and get to the checkout page, entering nothing and never signing in.
Five checkpoints: landed, found, item detail, in the cart, checkout page. For Reddit and X the last step is opening the reply box. A site that demands an account with no guest option is a sign-in wall. A CAPTCHA, an anti-agent notice, or a site error that survives one reload is a block. Runs the judge disputed are unscored; where an agent ran a site more than once, the majority outcome stands and ties are inconclusive.
agents
Grok Botgrok
grok bot · local machine · home connection
3 reached · 4 walls · 3 blocked
grok bot · local machine · home connection
3 reached · 4 walls · 3 blocked
Instinct
instinct · hosted browser
1 reached · 4 walls · 2 blocked · 3 unfinished
instinct · hosted browser
1 reached · 4 walls · 2 blocked · 3 unfinished
MuseMuse Spark
muse · cloud browser
4 reached · 4 walls · 2 blocked
muse · cloud browser
4 reached · 4 walls · 2 blocked
Browser Usegpt-5.6-luna
browser-use cloud · us residential proxy
2 reached · 4 walls · 2 blocked · 2 unfinished
browser-use cloud · us residential proxy
2 reached · 4 walls · 2 blocked · 2 unfinished
sites, best result first
Booking.com best: checkout reached · every agent (4)
Grok Botcheckout reached · C1–C5 · 1 run · The Wade, $441 for 2 nights
Instinctcheckout reached · C1–C5 · 1 run · Sports Illustrated Resorts Chicago, $633 for 2 nights
Musecheckout reached · C1–C5 · 1 run · Sports Illustrated Resorts Chicago (Deluxe King Studio), $667 for 2-night stay ($310/night)
Browser Usecheckout reached · C1–C5 · 1 run · The Wade, $441 for 2 nights before taxes and fees watch
Kayak best: checkout reached · Grok Bot · Muse
Grok Botcheckout reached · C1–C5 · 1 run · Southwest flight #801, BOS-DEN nonstop, $105 Basic
Instinctdid not finish · C1–C4 · 1 run · Southwest, BOS to DEN nonstop, 5:00 am–7:30 am, $105
Book a Flight
Musecheckout reached · C1–C5 · 1 run · Southwest flight #801 nonstop BOS→DEN, Oct 22, 2026, 5:00 AM–7:30 AM, $105 Basic fare
Browser Usedid not finish · C1–C4 · 1 of 2 runs watch
Expedia best: checkout reached · Grok Bot · Muse
Grok Botcheckout reached · C1–C5 · 1 run · avid hotel Denver Airport Area by IHG, $244.24 total for 2 nights
Instinctcaptcha · no checkpoint · 1 run
Show us your human side... We can't tell if you're a human or a bot.
Musecheckout reached · C1–C5 · 1 run · Renaissance Denver Hotel & Conference Center, $323 total for the stay ($322.94 on chec
Browser Useanti-agent notice · no checkpoint · 2 of 3 runs watch
Show us your human side... We can't tell if you're a human or a bot.
Nike best: checkout reached · Muse
Grok Botsite error · C1 · 1 run
We had an issue with your request. If you continue experiencing issues, try refreshing the page.
Instinctdid not finish · C1–C3 · 1 run · Nike Air Force 1 '07 Men's Shoes, $115
There are no items in your bag.
Musecheckout reached · C1–C5 · 1 run · Nike Air Force 1 '07 Men's Shoes, $115.00
Browser Usesite error · C1–C4 · 3 of 3 runs · Nike Air Force 1 '07, $115 watch
Error Sorry, we had an issue with your request. Please try again. [Code: AF8774E4 ]
Best Buy best: checkout reached · Browser Use
Grok Botsilent block · C1–C2 · 1 run
This site can't be reached — ERR_HTTP2_PROTOCOL_ERROR
Instinctsilent block · C1–C2 · 1 run
This site can’t be reached
Musesilent block · C1–C2 · 1 run
Clicking three different product links (NOCO XC3 10FT, NOCO XGrid XC3 sponsored result, Best Buy essentials 10' USB-C cable) all produced a browser error page: 'This site can't be reached ... ERR_HTTP2_PROTOCOL_ERROR'.
Browser Usecheckout reached · C1–C5 · 1 run · Insignia™ - 8 ft. 240W USB-C to USB-C Charge-and-Sync Braided Cable - Black, $19.99 watch
Costco best: sign-in wall at checkout · Grok Bot · Muse · Browser Use
Grok Botsign-in wall at checkout · C1–C4 · 1 run · Kirkland Signature Colombian Coffee, Dark Roast, 3 lbs, $24.99 online; $20.99 in-warehouse
Sign In — Email Address — Password
Instinctdid not finish · C1–C3 · 1 run · Kirkland Signature Colombian Coffee, Dark Roast, 3 lbs, $20.99
2-Day Delivery Out of Stock
Musesign-in wall at checkout · C1–C4 · 1 run · Kirkland Signature Colombian Coffee, Dark Roast, 3 lbs, $24.99
Sign In. Email Address. Password. Sign In. Need an account? Create Account. Not a Costco member? Join Today! Non-members will be assessed a 5% surcharge on orders.
Browser Usesign-in wall at checkout · C1–C4 · 1 run · Kirkland Signature Colombian Coffee, Dark Roast, 3 lbs, $24.99 watch
Sign In Email Address visibility Password Forgot Password?
Reddit best: sign-in wall at reply · Grok Bot · Instinct · Muse
Grok Botsign-in wall at reply · C1–C4 · 1 run · "hOw Do YoU tYpE yOuR pAsSwOrD?" | KBDFans Agar in E-white, GMK Dots light R2, EC PCB, Alu plate, 45g Naevies, full foam, n/a
Join the conversation
Instinctsign-in wall at reply · C1–C4 · 1 run · "hOw Do YoU tYpE yOuR pAsSwOrD?" | KBDFans Agar in E-white, GMK Dots light R2, EC PCB, Alu plate, 45g Naevies, full foam
Log In
Musesign-in wall at reply · C1–C4 · 1 run · "hOw Do YoU tYpE yOuR pAsSwOrD?" | KBDFans Agar in E-white, GMK Dots light R2, EC PCB, Alu plate, 45g Naevies, full foam
New to Reddit? Create your account and connect with a world of communities. The comment box (Button to add a comment) is disabled; a Sign Up dialog asking to create an account appeared.
Browser Usedid not finish · no checkpoint · 1 of 2 runs watch
Prove your humanity We’re committed to safety and security. But not for bots. Complete the challenge below and let us know you’re a real person.
Amazon best: sign-in wall at checkout · Grok Bot · Instinct · Browser Use
Grok Botsign-in wall at checkout · C1–C4 · 1 run · Amazon Basics 48-Pack AA Alkaline High-Performance Batteries, 1.5 Volt, 10-Year Shelf Life, Long-lasting, No Leakage, $15.29
Sign in or create account
Instinctsign-in wall at checkout · C1–C4 · 1 run · Allmax AA Maximum Power Alkaline Batteries (100 Count) – 1.5V | Double A • 10-Year Shelf Life • Leakproof Design • Ultra, $28.99
Sign in or create account
Muserefused by policy · no checkpoint · 1 run
Continued access by an unauthorized AI agent violates Amazon's Conditions of Use, to which our customers agree.
Browser Usesign-in wall at checkout · C1–C4 · 1 run · Duracell Coppertop AA Batteries, 28 Count, 12-Year Shelf Life, Storage Tray, $20.95 watch
Sign in or create account Enter mobile number or email
Walmart best: sign-in wall at checkout · Instinct · Muse · Browser Use
Grok Botcaptcha · C1 · 1 run
Robot or human? Activate and hold the button to confirm that you’re human. Thank You!
Instinctsign-in wall at checkout · C1–C4 · 1 run · Bounty Paper Towels Select-A-Size White, 6 Mega Rolls, 164 Sheets per Roll, $19.96
Sign in or create your account
Musesign-in wall at checkout · C1–C4 · 1 run · Sparkle Tear-A-Square Paper Towels, 6 Double Rolls, 110 Sheets per Roll, $8.48
Sign in or create your account. Not sure if you have an account? Enter your phone number or email and we'll check for you. Phone number or email (required). Continue
Browser Usesign-in wall at checkout · C1–C4 · 1 run · Bounty Paper Towels Select-a-Size, 6 Triple Rolls, $16.94 watch
Sign in or create your account Not sure if you have an account? Enter your phone number or email and we'll check for you.
X best: sign-in wall at search · every agent (4)
Grok Botsign-in wall at search · C1 · 1 run
See what's happening
Instinctsign-in wall at search · C1 · 1 run
See what's happening Select an option below:
Musesign-in wall at search · C1 · 1 run
Happening now. Select an option below: Continue with phone, Continue with Google, Continue with Apple, or Email or username. By continuing, you agree to our Terms of Service and Privacy Policy and Cookie Use.
Browser Usesign-in wall at search · C1 · 1 run watch
See what's happening Select an option below: Continue with phone Continue with Google Continue with Apple or Email or username Continue
what the labels mean
| checkout reached | the page asking for contact, shipping, traveler or payment details, with nothing entered |
| sign-in wall | the site required an account to continue and offered no guest path |
| refused by policy | a notice naming AI agents as unauthorized |
| silent block | the connection failed on one class of page, with no notice, while the rest of the site loaded |
| site error | an error page or modal that repeated after the permitted reload |
| did not finish | the agent ran out of time or budget, or its own report was disputed; not counted against the site |
draft protocol; the published index still runs task protocol t0.1. data: /api/checkout.json