📚docs: write docs/stellar/x402.md

[sotoJ24]

Title: docs: write docs/stellar/x402.md — x402 HTTP 402 agentic payment protocol, Phase 2 integration plan, and MCP server booking agent flow

Issue Summary

Documents Phase 2's x402 integration — how HTTP 402 Payment Required enables AI agents to autonomously book hospitality services on Stellar without human wallet signing. Covers the request/response flow, OpenZeppelin and Coinbase facilitator integration, why Stellar's ~$0.001 fees make micropayment-per-request viable (vs EVM chains), and how the existing SafeTrust MCP server (mcp/) becomes the AI agent interface in Phase 2.

Type of Issue

• Documentation

Branch strategy

✅ docs/issue-N-x402 → consolidation-pattern

Expected Behavior

docs/stellar/x402.md covering:

1. What x402 enables — AI agent autonomous booking without human signing

2. x402 request/response flow — HTTP 402 → X-Payment-Required header → payment → X-Payment header → 200 OK

3. Facilitators — OpenZeppelin (channels.openzeppelin.com/x402) and Coinbase

4. MCP server + x402 — how Claude AI + safetrust-mcp + x402 creates a complete agentic booking flow

5. Why Stellar — fee comparison (~$0.001 vs $1–10 EVM gas)

6. Environment variables — X402_FACILITATOR_URL, X402_PLATFORM_ADDRESS, USDC contract addresses

Files to create

File	Approx lines
docs/stellar/x402.md	~110

Make sure to follow the Git Guidelines for Atomic Commits and read Contributing Guide

• Contributing Guide
• Git Guidelines

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[GABRIELOFGOD]

@GABRIELOFGOD has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Please assign to me, I will fix it.

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[gospeltout]

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I’d love to work on this issue

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[DeePrincipal-dev-lang]

@DeePrincipal-dev-lang has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi there! I'd like to work on this issue if it's still open.
I'm a prompt engineer with a detail oriented, methodical approach to debugging and testing. I went through the issue description and already have a clear plan for tackling it. Happy to outline my approach before diving in if that would be useful for review.
I can start right away and will keep you posted on progress as I go, including test coverage and the PR link, so you have visibility the whole way through.
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[Muyideen-js]

@Muyideen-js has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I can fix this

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[6akola]

@6akola has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Please, assign me this issue.
I can handle it.
Thank you.

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[muizbolaji4]

@muizbolaji4 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hey maintainer I would love to work on this issue please assign it to me

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[Ghostcecode]

@Ghostcecode has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I've taken the time to go through the requirements and I'm confident I can put together a solution that satisfies the acceptance criteria. I'd be grateful if this could be assigned to me.

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[VeronicDev]

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I'd really love to work on this pls assign.

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[chikawobishie-sketch]

@chikawobishie-sketch has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, I will love to work on this issues, kindly assign it to me

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[drips-wave]

Congratulations, @bashir347! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @bashir347: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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🌊 Happy Wave 🌊

[drips-wave]

Congratulations, @wizard-web001! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @wizard-web001: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue is assigned to @wizard-web001 via the Stellar Wave Program.

Other assignees have been removed. To reassign, please unassign the current contributor through Drips Wave first.