Proposal: CAYPO — Open-Source Agent Payment Infrastructure for Canton
OPENPull Request
Development Fund Proposal Submission
Proposal file: /proposals/caypo.md
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Summary
CAYPO brings the Machine Payments Protocol (MPP) to Canton Network enabling AI agents to hold USDCx, make instant payments, and access 17+ API services through a single SDK. This is the first MPP integration for an institutional blockchain.
Milestones 1–2 are already completed and live:
- 5 npm packages published (v0.2.0): @caypo/mpp-canton, @caypo/canton-sdk, @caypo/canton-cli, @caypo/canton-mcp, @caypo/canton-gateway
- Live gateway: mpp.caypo.xyz — 17 services, 46 endpoints, MPP 402 gate active
- Website: caypo.xyz
- Canton method spec: tempoxyz/mpp-specs PR #198
- 312 tests passing (100%), 14 E2E on live Canton DevNet (Splice v0.5.12)
- 35 MCP tools + 20 prompts, 36 CLI commands
Team: Cayvox Labs — Canton mainnet validator operator and Canton Catalyst 2026 #1 place .
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Checklist
- [x] Proposal file added under
/proposals/ - [x] Milestones and funding amounts defined
- [x] Acceptance criteria included
- [x] Alignment with Canton priorities described
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Notes for Reviewers
- M1 and M2 are already completed. All deliverables are live and independently verifiable at the links above.
- Competitive urgency: Tempo, Stripe, Visa, Lightning have official MPP methods. Sui has a full agent platform (t2000). Solana Foundation is building an official MPP SDK. Stellar just submitted a spec (PR #199). Canton needs MPP support to participate in the emerging agentic economy.
- Upstream contribution: Canton method spec submitted to tempoxyz/mpp-specs (PR #198), positioning Canton alongside Tempo, Stripe, and Visa.
- All code is open-source (Apache 2.0 / MIT dual license).
- Full details in the proposal file: market analysis, competitive landscape, 4 milestones with acceptance criteria, and co-marketing plan.
