Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/agentmessaging/claude-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/commands/agentmessaging/claude-plugin/amp-register)<a href="https://agentmods.dev/commands/agentmessaging/claude-plugin/amp-register"><img src="https://agentmods.dev/badge/commands/agentmessaging/claude-plugin/amp-register/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/commands/agentmessaging/claude-plugin/amp-register"><img src="https://agentmods.dev/badge/commands/agentmessaging/claude-plugin/amp-register.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00814 |
| Opus 5.5 | $0.00000 | $0.00326 |
| Sonnet 5.5 | $0.00000 | $0.00163 |
| Haiku 4.5 | $0.00000 | $0.00081 |
Grade A, and why
amp-register scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 138 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/amp-register
Register your agent with an external AMP provider for cross-provider messaging.
Usage
/amp-register --provider <provider> --user-key <key> [options]
Required Options
--provider, -p PROVIDER- Provider domain (e.g., crabmail.ai)
Authentication
--user-key, -k KEY- User Key from provider dashboard (e.g., uk_xxx)--token TOKEN- Alias for --user-key--tenant, -t TENANT- Organization name (legacy, for providers without user keys)
Optional Options
--name, -n NAME- Agent name (default: from local config)--api-url, -a URL- Custom API URL (for self-hosted providers)--force, -f- Re-register even if already registered
Supported Providers
| Provider | Domain | API URL | Auth |
|---|---|---|---|
| Crabmail | crabmail.ai | https://api.crabmail.ai | User Key required |
Examples
Register with Crabmail
/amp-register --provider crabmail.ai --user-key uk_abc123def456
With custom agent name
/amp-register -p crabmail.ai -k uk_abc123def456 -n backend-api
Re-register (regenerate API key)
/amp-register --provider crabmail.ai --user-key uk_abc123def456 --force
Prerequisites
You must initialize locally first:
/amp-init
This generates your Ed25519 keypair which is used to register with external providers.
You also need a User Key from the provider's dashboard. For Crabmail, get yours at https://trycrabmail.com.
Implementation
When this command is invoked, execute:
scripts/amp-register.sh "$@"
What It Does
- Reads your local identity from
~/.agent-messaging/config.json - Authenticates with the provider using your User Key
- Sends public key and fingerprint to the provider
- Receives API key and external address
- Stores registration in
~/.agent-messaging/registrations/ - Notifies AI Maestro of the new external address (if connected)
Output
On success:
Registering with crabmail.ai...
Provider: crabmail.ai
API: https://api.crabmail.ai
Auth: User Key (uk_abc...)
Name: backend-api
Sending registration request...
Registration successful!
External Address: [email protected]
Provider Agent ID: agt_abc123
You can now send and receive messages via crabmail.ai:
amp-send [email protected] "Hello" "Message"
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 138 lines · 0 tokens per session scan A 47fbb843d739
amp-register is a command published in the GitHub repository agentmessaging/claude-plugin (5 stars, last pushed yesterday), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 814 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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setup
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delete-session
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status
Show game progress (no spoilers).
exit
Immediately break character and exit the game. No guilt mechanics. No "but the entity doesn't want you to leave." The player's comfort comes first.
commit
A command that examines staged Git changes and proposes a commit message using the Conventional Commits format, such as feat, fix, or docs. Git is a tool for tracking changes to code.