Document MPP browser purchases

[AnnaXWang]

summary

document the production mpp browser purchase flow under Info, with the page last in that section. show the single link-cli mpp pay command, which presents a Link approval URL and completes the payment after approval. describe the browser connection response and safe retries. clarify that Link via the CLI is the only supported payment flow for now; standalone card credentials and stablecoin payments are not offered. distinguish paying for KERNEL browser access from merchant checkout.

verification

• rendered /info/mpp in the local Mintlify preview before the final copy update
• validated docs.json and ran git diff --check
• confirmed the enabled production endpoint returns an HTTP 402 MPP challenge for a $0.50, 30-minute browser
• did not run a paid transaction

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated
Kernel	🟢 Ready	View Preview	Sep 29, 2026, 3:43 PM

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[cursor]

Risk assessment: Very Low

Approved. This change is documentation-only and does not alter application, auth, billing, or infrastructure behavior.

What changed

• browsers/mpp.mdx (new): public guide for buying a browser session through the staging MPP endpoint
• browsers/payments.mdx: one cross-link explaining that MPP pays for browser access, separate from merchant checkout
• docs.json: adds browsers/mpp to the existing sidebar group

Why this is Very Low

• 84 additions across 3 files, no deletions, no production code paths
• No shared libraries, permissions, schema, or deployment config
• docs.json only inserts a navigation page id next to the existing payments page
• No code owner review is required on main

The page documents an existing staging HTTP route and tells readers to treat returned connection URLs as credentials. That is explanatory copy, not a change to how those credentials are issued.

  

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[cursor]

Risk assessment: Very Low

Re-checked after the push to bf807ba. Risk did not increase, so the existing approval stands. This review does not add a second approval.

What changed since the previous approval (160f23e)

• browsers/mpp.mdx: the "When to use mpp" section now distinguishes the MPP protocol (an agent paying a merchant) from KERNEL's endpoint (an agent paying KERNEL for browser access).
• browsers/payments.mdx and docs.json are unchanged from the approved commit.

Full PR scope

• New public guide browsers/mpp.mdx
• One cross-link on browsers/payments.mdx
• Sidebar entry for browsers/mpp in docs.json

Why this stays Very Low

• Documentation and navigation only. No application code, auth, billing logic, schema, or deployment config.
• The new copy explains an existing staging route. It does not change how payments or browser connection URLs are issued.
• Code owner review is not required on main (require_code_owner_review is false).

  

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[cursor]

Risk assessment: Very Low

Re-checked after the push to 290d024. Risk did not increase, so the existing approval stands. This review does not add a second approval.

What changed since the previous review (bf807ba)

• browsers/mpp.mdx: one sentence now states the staging route accepts Stripe shared payment tokens (spt_...) only, and that card and link in the 402 challenge name methods the token can represent rather than credentials you can send to the endpoint.

Full PR scope

• New public guide browsers/mpp.mdx
• One cross-link on browsers/payments.mdx
• Sidebar entry for browsers/mpp in docs.json

Why this stays Very Low

• Documentation and navigation only. No application code, auth, billing logic, schema, or deployment config.
• The edit clarifies how an existing staging route is called. It does not change how payments or browser connection URLs are issued.
• Code owner review is not required on main (require_code_owner_review is false).

  

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[cursor]

Risk assessment: Very Low

Re-checked after the push to 4d47538. Risk did not increase, so the existing approval stands. This review does not add a second approval.

What changed since the previous review (290d024)

• browsers/mpp.mdx only. The frontmatter description and the buyer-flow copy now document Link as the buyer path: the Link CLI retries with a Stripe shared payment token (spt_...), and KERNEL validates the token rather than the issuer. The Link CLI link points at Stripe's machine-payments docs. browsers/payments.mdx and docs.json are unchanged.

Full PR scope

• New public guide browsers/mpp.mdx
• One cross-link on browsers/payments.mdx
• Sidebar entry for browsers/mpp in docs.json

Why this stays Very Low

• Documentation and navigation only. No application code, auth, billing logic, schema, or deployment config.
• The edit clarifies how an existing staging route is called. It does not change how payments or browser connection URLs are issued.
• No CODEOWNERS file is present, so code owner review is not required.

  

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[cursor]

Risk assessment: Very Low

Re-checked after the push to ca45bcd. Risk did not increase, so the existing approval stands. This review does not add a second approval.

What changed since the previous review (4d47538)

• browsers/payments.mdx: the cross-link to the new MPP guide was removed (two lines). That file now matches main.

Full PR scope

• New public guide browsers/mpp.mdx (staging MPP browser purchase flow, Link CLI example, and Playwright connection snippets)
• Sidebar entry for browsers/mpp in docs.json

Why this stays Very Low

• Documentation and navigation only. No application code, auth, billing logic, schema, or deployment config.
• The page describes an existing staging route. It does not change how payments or browser connection URLs are issued.
• Code owner review is not required on main (require_code_owner_review is false).

  

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[cursor]

Risk assessment: Very Low

Re-checked after the push to 35352f2. Risk did not increase, so the existing approval stands. This review does not add a second approval.

What changed since the previous review (ca45bcd)

• The guide moved from browsers/mpp.mdx to info/mpp.mdx, and docs.json moves the sidebar entry from the browsers group to the end of Info.
• The page now documents the production host https://api.onkernel.com/mpp/browsers instead of the staging host, drops the staging warning, and shows a Link CLI pay command with an approved spend request instead of --test.

Full PR scope

• New public guide info/mpp.mdx
• Sidebar entry for info/mpp in docs.json

Why this stays Very Low

• Documentation and navigation only. No application code, auth, billing logic, schema, or deployment config.
• The edit changes which host and commands the docs describe. It does not change how payments or browser connection URLs are issued.
• Code owner review is not required on main (require_code_owner_review is false). No CODEOWNERS file is present.

  

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[cursor]

Risk assessment: Very Low

Re-checked after the push to d640fd6. Risk did not increase, so the existing approval stands. This review does not add a second approval.

What changed since the previous review (35352f2)

• info/mpp.mdx: one sentence no longer links to https://api.onkernel.com/openapi.json. It now tells readers to read the 402 challenge for the current price and duration.

Full PR scope

• New public guide info/mpp.mdx
• Sidebar entry for info/mpp in docs.json

Why this stays Very Low

• Documentation and navigation only. No application code, auth, billing logic, schema, or deployment config.
• The latest edit is a one-line copy change on a docs page. It does not change how payments or browser connection URLs are issued.
• Code owner review is not required on main (require_code_owner_review is false). No CODEOWNERS file is present.

  

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[cursor]

Cursor Bugbot has reviewed your changes using default effort and found 2 potential issues.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

Want higher recall? High effort reviews run extra passes and find more bugs. A team admin can switch effort levels in the Cursor dashboard.

^{Reviewed by Cursor Bugbot for commit e823419. Configure here.}

[cursor]

Unescaped dollar amount in MDX

Medium Severity

The MPP price uses an unescaped $ in MDX. Mintlify treats paired dollar signs as KaTeX, which can garble this amount if another $ appears on the page.

 

^{Triggered by learned rule: Escape dollar signs in MDX to prevent Mintlify LaTeX rendering}

^{Reviewed by Cursor Bugbot for commit e823419. Configure here.}

[cursor]

Link product name is incomplete

Low Severity

The page refers to the payment product as link and stripe's link cli without introducing it as link by stripe first.

Additional Locations (2)

• info/mpp.mdx#L2-L3
• info/mpp.mdx#L21-L22

 

^{Reviewed by Cursor Bugbot for commit e823419. Configure here.}