ap2-a2a-extension SKILL.md skillA
ap2-a2a-extension from orcaqubits/agentic-commerce-skills-plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add orcaqubits/agentic-commerce-skills-plugins/ap2-a2a-extension@git:20260914.08f85a3Pins git:20260914.08f85a3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- orcaqubits/agentic-commerce-skills-plugins
- Path
ap2-agentic-payments/skills/ap2-a2a-extension/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260914.08f85a3, committed Sep 14, 2026
- First version recorded
- Mar 9, 2026
- Size
- 4,624 bytes
- Repository stars
- 40
- License
- MIT
Implement AP2 as an A2A extension — mandate DataParts in A2A messages, Agent Card AP2 capabilities, payment-specific task flows, and inter-agent payment communication. Use when integrating AP2 payment capabilities into A2A multi-agent systems.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# AP2 as an A2A Extension
## Before writing code
**Fetch live docs**:
1. Fetch `https://ap2-protocol.org/ap2/specification/` for the A2A extension specification
2. Fetch `https://ap2-protocol.org/ap2/implementation_considerations/` for protocol integration details
3. Web-search `site:github.com google-agentic-commerce AP2 a2a extension` for reference implementation
4. Web-search `site:github.com google-agentic-commerce AP2 samples a2a` for A2A-based samples
## Conceptual Architecture
### AP2 Extends A2A
AP2 is designed as a **direct extension of the A2A protocol**. It adds payment-specific capabilities to A2A's general-purpose agent-to-agent communication:
- A2A provides: tasks, messages, parts, streaming, agent cards
- AP2 adds: mandates, payment flows, VDCs, cryptographic signing, risk signals
### Why A2A is Required
As the documentation states: "A2A is required to standardize intra-agent communication — as soon as you have more than one agent you need A2A." AP2 adds payment standardization on top.
### How AP2 Rides on A2A
#### Agent Cards with AP2 Capabilities
AP2 agents declare payment support in their Agent Card:
```json
{
"name": "MerchantAgent",
…Read the whole file at its exact version.
How to install
mdr add orcaqubits/agentic-commerce-skills-plugins/ap2-a2a-extension@sha256:a2cf99038ca4f867The line at the top of this page pins the label git:20260914.08f85a3, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_zc6tmc524xxyr6x4)
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Versions
The registry has recorded 2 versions of this file, between Mar 9, 2026 and Sep 14, 2026, about one every 189 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260914.08f85a3 latest | 2026-09-14 | 08f85a3 | 4,624 B | A | view · diff |
| git:20260309.786511c | 2026-03-09 | 786511c | 4,601 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4624 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
orcaqubits/agentic-commerce-skills-plugins · 40 stars · license MIT · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_zc6tmc524xxyr6x4 GET https://markdownregistry.com/api/v1/resolve?ref=orcaqubits/agentic-commerce-skills-plugins/ap2-a2a-extension GET https://markdownregistry.com/api/v1/blob/a2cf99038ca4f867e8979614411ea1d1c67bae9a1589e241470bf6c3b6bd69e6
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.