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 skills add Gentech-Labs/genTech-agent-kit --skill x402-paymentsgit clone --depth 1 https://github.com/Gentech-Labs/genTech-agent-kitWrote 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/skills/gentech-labs/gentech-agent-kit/x402-payments)<a href="https://agentmods.dev/skills/gentech-labs/gentech-agent-kit/x402-payments"><img src="https://agentmods.dev/badge/skills/gentech-labs/gentech-agent-kit/x402-payments/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/skills/gentech-labs/gentech-agent-kit/x402-payments"><img src="https://agentmods.dev/badge/skills/gentech-labs/gentech-agent-kit/x402-payments.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 | $0.00045 | $0.00615 |
| Opus 5 | $0.00023 | $0.00308 |
| Sonnet 5 | $0.00009 | $0.00123 |
| Haiku 4.5 | $0.00005 | $0.00061 |
Grade A, and why
x402-payments 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 8d 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
x402 Payments for AI Agents
x402 is the HTTP-native payment standard. When an agent hits an endpoint without payment, the server returns 402 Payment Required with a challenge. The agent signs the payment and retries. The server verifies and serves the resource.
Payment Flow
Agent Server Facilitator
│ │ │
├── GET /api/data ──────►│ │
│◄── 402 Payment ───────┤ │
│ Required │ │
│ │ │
├── POST /facilitator/verify ──────────────────────►│
│◄── Verified + Receipt ───────────────────────────┤
│ │ │
├── GET /api/data ──────►│ │
│ (x402 header) │ │
│◄── 200 OK + Data ─────┤ │
Supported Networks
| Network | Facilitator | Token | Chain ID |
|---|---|---|---|
| Algorand | GoPlausible | ALGO | algorand:localnet |
| Robinhood Chain | Naven Network | USDG | eip155:4663 |
| Base | CDP Facilitator | USDC | eip155:8453 |
GenTech Kit Tools
from gentech_agent_kit.plugins.algorand_x402 import register_gentech_plugin
from gentech_agent_kit.plugins.robinhood_x402 import register_gentech_plugin
Tools auto-discovered. No manual config needed.
Session Management
Payments open a 60-minute session. Session token (HMAC-signed) is passed on subsequent calls:
session = algorand_verify_payment(payment_proof)
# session_token = "agent_1234567890_abc123:1712345678:signature"
data = algorand_get_quote("BTC", session_token=session_token)
Pricing Patterns
| Pattern | Use Case | Example |
|---|---|---|
| Exact | Fixed price per call | $0.001 USDG per quote |
| Tiered | Different prices for different data | $0.001 crypto, $0.005 stocks |
| Subscription | Batch pricing, session-based | 10 queries for $0.01 |
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.
- 8d ago First seen · 68 lines · 45 tokens per session scan A 5fadb571e75b
x402-payments is a skill published in the GitHub repository Gentech-Labs/genTech-agent-kit (0 stars, last pushed 17d ago), licensed MIT. It adds 45 tokens to every session and 615 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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