docs: add payments infrastructure page with stellartools

[devodii]

What

Adds a new Payments Infrastructure category page under Tools → Developer Tools → More Developer Tools, and lists StellarTools as the first entry.

Why

The docs currently have no home for community-built payments/billing tooling. StellarTools is an open-source, Stripe-like payments platform built on Stellar (checkout, subscriptions, usage-based billing, payouts to local currencies, webhooks, a TypeScript SDK, and an MCP server). It doesn't fit the existing categories
It isn't a wallet, explorer, anchor tool, or node tool, so this adds a dedicated category in the same spirit as "Payments Infrastructure" that can also house future community payment tools.

Changes

• New page: docs/tools/developer-tools/payments-infrastructure.mdx
• Added a category card to docs/tools/developer-tools/README.mdx

Notes

Happy to adjust the category name or placement 🙌🏽 flagging @leighmcculloch as the maintainer of the Developer Tools pages for a steer on naming and sidebar ordering.
Also open to cross-linking from the Agentic Payments section given the MCP server, if that's useful.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds a new documentation page describing payments infrastructure tooling on Stellar, highlighting StellarTools as an option for checkout, subscriptions, and payouts.

Changes:

• Introduces a new “Payments Infrastructure” docs page under developer tools
• Documents StellarTools with a short description, feature list, and relevant links

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[devodii]

ping @kaankacar @leighmcculloch

[kaankacar]

🤖 Automated message from Kaan's Automated Triage Bot.

Reviewing because a review was requested from @wmendes.

The author's company is the payrouteshq org, which owns StellarTools. Should the docs list it? @kaankacar @ElliotFriend

The content checks out. One thing left for @devodii: routes.txt needs the line /docs/tools/developer-tools/payments-infrastructure, or the build job fails. The fork blocks pushes, so I cannot add it.

[devodii]

@kaankacar Fixed — pushed 41a681c adding the missing /docs/tools/developer-tools/payments-infrastructure line to routes.txt, build check should pass now.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

[kaankacar]

🤖 Automated message from Kaan's Automated Triage Bot.

Reviewing because a review was requested from @wmendes.

Thanks @devodii. The routes.txt line is correct and in sort order. The build check still waits for maintainer approval, so I verified the route by hand.

The listing decision is still open: @devodii is a member of the payrouteshq org, which owns StellarTools. Should the docs list it? @kaankacar @ElliotFriend

[devodii]

@kaankacar @ElliotFriend Good to flag — yes, i'm affiliated with payrouteshq/StellarTools, so I'll let you two make the call on whether it's listed, happy to add any disclosure note if that helps.

For context: StellarTools is funded by the Stellar Community Fund in SCF#40, so it'salready been vetted as a project serving the ecosystem rather than a one-off promotional add.

[kaankacar]

🤖 Automated message from Kaan's Automated Triage Bot.

Reviewing because a review was requested from @wmendes.

The SCF claim checks out. SCF #40 awarded $53,450 to that submission, official record, as of 2026-09-01.
Two naming notes for the reviewer: the award is filed under the project name Paykit. The repo on record is usepaykit/stellar-tools, not the payrouteshq/stellartools this page links.

Still your call whether the docs list it. @kaankacar @ElliotFriend