a2a-agent-card SKILL.md skillA
a2a-agent-card 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/a2a-agent-card@git:20260309.786511cPins git:20260309.786511c 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
a2a-multi-agent/skills/a2a-agent-card/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260309.786511c, committed Mar 9, 2026
- Size
- 4,217 bytes
- Repository stars
- 40
- License
- MIT
Create and configure A2A Agent Cards — the discovery document describing an agent's capabilities, skills, authentication, and endpoint. Use when defining what your agent exposes to other agents.
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
# A2A Agent Card
## Before writing code
**Fetch live docs**:
1. Fetch `https://a2a-protocol.org/latest/specification/` and look for the Agent Card schema section
2. Web-search `site:github.com a2aproject A2A agent card schema` for the JSON Schema definition
3. Web-search `site:github.com a2aproject a2a-samples agent-card` for real-world Agent Card examples
4. Fetch SDK docs for Agent Card builder/helper classes
## Conceptual Architecture
### What the Agent Card Is
The Agent Card is a JSON document that describes an A2A agent to potential clients. It's the **discovery and capability advertisement mechanism** — analogous to an OpenAPI spec for REST APIs, but for agent-to-agent communication.
### Hosting
By convention, Agent Cards are served at:
```
{agent_base_url}/.well-known/agent-card.json
```
Agents can also be discovered via:
- Agent registries (centralized directories)
- Direct configuration (hard-coded URLs)
- Referral from other agents
### Key Sections
#### Identity
- **name** — Human-readable name
- **description** — What the agent does
- **url** — The agent's A2A endpoint (where JSON-RPC requests go)
- **version** — Semantic version of the agent
…Read the whole file at its exact version.
How to install
mdr add orcaqubits/agentic-commerce-skills-plugins/a2a-agent-card@sha256:bcccfdaeddc5758fThe line at the top of this page pins the label git:20260309.786511c, 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_w2wyiht35k22dt26)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 9, 2026.
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 (4217 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_w2wyiht35k22dt26 GET https://markdownregistry.com/api/v1/resolve?ref=orcaqubits/agentic-commerce-skills-plugins/a2a-agent-card GET https://markdownregistry.com/api/v1/blob/bcccfdaeddc5758fbf39fb83764dcfa7ceef28311b5a0ed794d32c08d298f9be
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.