# spArxx.io | Zero-Knowledge Blockchain Timestamping agent skills for Claude Code, Cursor and RevampKey

> Ready-made spArxx.io | Zero-Knowledge Blockchain Timestamping playbooks for AI agents: audit your spArxx.io timestamps and spark spending, verify a spArxx.io timestamp with AI. Free SKILL.md files for Claude Code, Cursor and Codex, or one click in RevampKey.

## Skills

- [Use spArxx.io safely with AI](https://revampkey.com/marketplace/sparxx-io/skills/essentials.md): Connects your spArxx.io account and uses its six tools to find, verify, price and register timestamps. It confirms the account and access level first and asks for your explicit yes before spending sparks.
- [Audit your spArxx.io timestamps and spark spending](https://revampkey.com/marketplace/sparxx-io/skills/timestamp-audit-and-cost-review.md): Reviews your spArxx.io evidence history and spark balance against current pricing, flags gaps and duplicates, and plans the cost of new timestamps. It reads and plans only, and asks before spending any sparks.
- [Verify a spArxx.io timestamp with AI](https://revampkey.com/marketplace/sparxx-io/skills/verify-timestamp-evidence.md): Checks whether a file or certificate matches a spArxx.io blockchain timestamp and reports what the match proves and what it does not. It only reads records and never registers anything or spends sparks.

## Install

- RevampKey: connect spArxx.io | Zero-Knowledge Blockchain Timestamping at https://revampkey.com/marketplace/sparxx-io; the skills come with it.
- Any Agent Skills tool, into the current project:

```bash
for s in essentials timestamp-audit-and-cost-review verify-timestamp-evidence; do
  curl -fsSL --create-dirs -o .agents/skills/sparxx-io-$s/SKILL.md https://revampkey.com/marketplace/sparxx-io/skills/$s/SKILL.md
done
```

### What is a spArxx.io | Zero-Knowledge Blockchain Timestamping agent skill?

A SKILL.md file: a short playbook an AI agent loads when your request matches it. Each spArxx.io | Zero-Knowledge Blockchain Timestamping skill describes one job, which spArxx.io | Zero-Knowledge Blockchain Timestamping tools to use in which order, what to check first and when to stop and ask you.

### Do the spArxx.io | Zero-Knowledge Blockchain Timestamping skills change anything on their own?

1 of the 3 only read. The others tell the agent to show you the change and wait for a yes before it creates, edits or deletes anything in spArxx.io | Zero-Knowledge Blockchain Timestamping.

### Which tools can use these skills?

Any agent that reads the open Agent Skills format: Claude Code, Cursor, Codex, VS Code with Copilot and RevampKey. In RevampKey they are attached when you connect spArxx.io | Zero-Knowledge Blockchain Timestamping; elsewhere you copy the folders into your project or skills directory.

### Do I need the spArxx.io | Zero-Knowledge Blockchain Timestamping MCP server too?

Yes. The skills tell the agent how to do the work; the spArxx.io | Zero-Knowledge Blockchain Timestamping MCP server gives it the tools to do it. The spArxx.io | Zero-Knowledge Blockchain Timestamping MCP setup guide covers every client.

MCP setup guide: https://revampkey.com/marketplace/sparxx-io.md