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Ucp

vercel-labs/agentic-commerce-skillsOfficial

A comprehensive implementation assistant for adding Universal Commerce Protocol support to Next.js ecommerce projects. It walks you through the full lifecycle: cloning the spec repo, running a 12-question consultation to configure your UCP implementation, analyzing existing APIs for gaps, scaffolding working handlers and routes, generating the discovery profile at /.well-known/ucp, and validating against schemas. Everything is config-driven through ucp.config.json, and it enforces Node.js or Bun runtimes only (no Edge). The gap analysis uses AST parsing to trace data flows, which is notably more thorough than basic grep patterns. If you're building checkout flows that need to interoperate with AI agents or payment platforms via REST, MCP, or A2A transports, this handles the tedious spec compliance work.

skills.sh installs
936
GitHub stars
16
last updated
Aug 21, 2026
View on GitHub

Install

$ npx -y skills add vercel-labs/agentic-commerce-skills --skill ucp --agent claude-code

Installs into .claude/skills of the current project.

Files

UCP Skill — Universal Commerce Protocol Implementation

Core Principles

  1. Edge runtime is NOT USED — Only Node.js (default) or Bun (opt-in) runtimes
  2. Interactive error handling — When ambiguous, ask the user how to proceed
  3. Config-driven — All decisions persist in ucp.config.json
  4. Spec-grounded — All implementations reference the canonical UCP specification
  5. Next.js conventions — Follow App Router patterns for code organization
  6. Deep analysis — Use AST parsing and data flow tracing for gap detection

Spec Repository Handling

Location Priority

Check in this order:

  1. ./ucp/ — User's local copy (use as-is)
  2. ./.ucp-spec/ — Previously cloned spec (update it)
  3. Neither exists — Clone fresh

Clone Procedure

When cloning is needed:

git clone --depth 1 https://github.com/Universal-Commerce-Protocol/ucp.git .ucp-spec

If HTTPS fails, try SSH:

git clone --depth 1 git@github.com:Universal-Commerce-Protocol/ucp.git .ucp-spec

Update Procedure

When ./.ucp-spec/ exists:

cd .ucp-spec && git pull && cd ..
SKILL.md on GitHub

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Details

Repository
github.com/vercel-labs/agentic-commerce-skills
Categories
Frontend Development, Testing & QA, AI & Agent Building, Cloud & Infrastructure
First seen
Jun 3, 2026

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