feat(stacks): add Stacks blockchain ecosystem support #962
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Add two new ecosystem partners for Stacks blockchain support: - x402-stacks: TypeScript client/server library for x402 payments on Stacks, supporting STX and sBTC tokens with axios interceptors and Express middleware - STX402: Registry and dashboard for x402-enabled endpoints on the Stacks blockchain 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Document how the x402 exact payment scheme works on the Stacks blockchain: - Protocol flow for client-signed, facilitator-broadcast transactions - PaymentRequirements and PaymentPayload structures - Support for STX native token and SIP-010 fungible tokens (sBTC, USDCx) - Facilitator verification rules - Security considerations for fully-signed transactions 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add stx402.svg and x402-stacks.svg logos - Rename x402 Stacks SDK to x402Stacks (matching repo name) - Update metadata to reference SVG logos - Update spec reference to use consistent naming 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Update stx402.svg with new design - Rename x402-stacks.svg to x402Stacks.svg - Update logoUrl reference in metadata.json Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Update x402Stacks websiteUrl to x402stacks.xyz - Add x402StacksScan for ecosystem explorer at scan.x402stacks.xyz - Add x402Stacks Facilitator with live endpoint at facilitator.x402stacks.xyz Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add AIBTC x402 API, x402 Biwas, and AIBTC Sponsor Relay entries - Update facilitator to support both mainnet and testnet - Add GitHub URLs to stx402 and x402-stacks entries - Document sBTC and USDCx contract addresses in scheme spec Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Add aibtc.png logo for AIBTC entries - Add biwas.jpg logo for x402 Biwas entry - Update Biwas description with AI analytics details and STX support Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
- Change websiteUrl from incorrect GitHub URL to stacksx402.com - Add correct githubUrl pointing to x402Stacks/x402-stacks-facilitator Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Move STX402 from Infrastructure & Tooling to Services/Endpoints. Fix category name for AIBTC and Biwas entries. Update descriptions. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add detailed low-level documentation for implementers including: - CAIP-2 network identifiers and chain ID derivation - Transaction structure and byte-level layout - Payload types for STX and SIP-010 transfers - Clarity value encoding with type IDs - Standard and sponsored authorization structures - Signature format (65-byte recoverable ECDSA) - Post-condition encoding for STX and fungible tokens - Annotated hex examples for STX and sBTC transfers - Address version bytes for mainnet/testnet Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
Adds x402 protocol support for the Stacks blockchain, including the "exact" payment scheme specification, ecosystem entries for available services, and supporting assets.
About Stacks
What's Included
Scheme Specification
specs/schemes/exact/scheme_exact_stacks.md- Complete "exact" payment scheme for StacksEcosystem Entries
Supported Tokens
SM3VDXK3WZZSA84XXFKAFAF15NNZX32CTSG82JFQ4.sbtc-token::sbtc-tokenST1F7QA2MDF17S807EPA36TSS8AMEFY4KA9TVGWXT.sbtc-token::sbtc-tokenSP120SBRBQJ00MCWS7TM5R8WJNTTKD5K0HFRC2CNE.usdcx::usdcx-tokenLive Services
note: posting all links here for informational purposes and to make sure we didn't miss adding anything!
Protocol / facilitator:
Sponsored / gasless TX relay:
stx402 endpoints:
AIBTC endpoints:
Biwas endpoints:
🤖 Generated with Claude Code