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.
npx agentmods add skills/aethercore-dev/ag402/ag402-skillnpx skills add AetherCore-Dev/ag402 --skill ag402-skillgit clone --depth 1 https://github.com/AetherCore-Dev/ag402What 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 | $0.00042 | $0.00992 |
| Opus 5 | $0.00021 | $0.00496 |
| Sonnet 5 | $0.00008 | $0.00198 |
| Haiku 4.5 | $0.00004 | $0.00099 |
Grade A, and why
ag402 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 2d 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 — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ag402 — AI Agent Payment Protocol
Use exec to run ag402 CLI commands. This skill provides autonomous payment
capabilities for AI agents via the x402 protocol on Solana (USDC).
When to Use
- Agent needs to call a paid API (HTTP 402 response)
- Agent needs to check wallet balance or transaction history
- Agent needs to set up payment infrastructure
- Agent needs to start/stop a payment gateway
Quick Start
1. Check if ag402 is installed
ag402 --version
If not installed:
pip install ag402-core
2. Initialize wallet (non-interactive, agent-safe)
ag402 init
Creates a test wallet with $100 USDC. No prompts, no human input needed.
3. Verify setup
ag402 balance
Expected: $100.00 test balance.
Commands
Pay for an API call
ag402 pay <url>
Sends a request to <url>. If the server returns 402 Payment Required with
an x402 challenge, ag402 automatically pays and retries. Returns the API response.
Example:
ag402 pay https://api.example.com/premium/data
With options:
ag402 pay https://api.example.com/generate \
--method POST \
--data '{"prompt": "hello"}' \
--amount 2.50
Check balance
ag402 balance
View transaction history
ag402 history
ag402 history --limit 20 --type payment
Full status dashboard
ag402 status
Health check
ag402 doctor
Start payment gateway (seller mode)
ag402 serve --target http://localhost:8000 --price 0.01 --port 4020 &
Stop gateway
Kill the background process or use Ctrl+C in the terminal.
Production Mode
For real on-chain payments, set environment variables before running:
X402_MODE=production \
X402_NETWORK=mainnet \
SOLANA_RPC_URL=<your_rpc_url> \
AG402_UNLOCK_PASSWORD=<wallet_password> \
ag402 pay <url>
Or configure persistently:
ag402 env set X402_MODE production
ag402 env set X402_NETWORK mainnet
ag402 env set SOLANA_RPC_URL <your_rpc_url>
What ships with it
22 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- __init__.py 276 B runs code
- PRDs/ag402_prepaid_prd.md 3.5 KB
- prepaid_client.py 8.4 KB runs code
- prepaid_models.py 4.2 KB runs code
- prepaid_server.py 6.9 KB runs code
- PRPs/planning/ag402_prepaid-phase-1_analysis.md 2.5 KB
- PRPs/PRP-ag402_prepaid-phase-1.md 5.5 KB
- PRPs/PRP-ag402_prepaid-phase-2.md 7.2 KB
- PRPs/PRP-ag402_prepaid-phase-3.md 9.8 KB
- PRPs/PRP-ag402_prepaid-phase-4.md 4.6 KB
- PRPs/templates/prp_base.md 6.1 KB
- README.md 3.0 KB
- references/commands.md 5.4 KB
- references/gateway.md 615 B
- references/README.md 3.0 KB
- references/security-design.md 1.3 KB
- scripts/install-auto.sh 5.4 KB runs code
- scripts/install-wizard.sh 10 KB runs code
- scripts/verify-install.sh 9.9 KB runs code
- SECURITY.md 1.8 KB
- skill.py 30 KB runs code
- TOOLS.md 2.6 KB
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.
- 2d ago First seen · 168 lines · 42 tokens per session scan A c9fd8718ece1
ag402 is a skill published in the GitHub repository AetherCore-Dev/ag402 (9 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 992 once invoked, about $0.0002 per session on Opus 5. 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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