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 rylsherdamz-rgb/stellar-forge --skill agentic-paymentsgit clone --depth 1 https://github.com/rylsherdamz-rgb/stellar-forgeWrote 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/rylsherdamz-rgb/stellar-forge/agentic-payments)<a href="https://agentmods.dev/skills/rylsherdamz-rgb/stellar-forge/agentic-payments"><img src="https://agentmods.dev/badge/skills/rylsherdamz-rgb/stellar-forge/agentic-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/rylsherdamz-rgb/stellar-forge/agentic-payments"><img src="https://agentmods.dev/badge/skills/rylsherdamz-rgb/stellar-forge/agentic-payments.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00038 | $0.00236 |
| Opus 5 | $0.00019 | $0.00118 |
| Sonnet 5 | $0.00008 | $0.00047 |
| Haiku 4.5 | $0.00004 | $0.00024 |
Grade A, and why
agentic-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 10d 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.
What it actually says
Agentic Payments (x402 + MPP)
Source Files (published with this skill)
| File | Contents |
|---|---|
templates/src/middleware/x402.ts |
Express middleware — checks x402 payment header, verifies OZ channel, rejects unpaid requests with 402 |
x402 Middleware
See templates/src/middleware/x402.ts for the full implementation. Import and apply:
import { x402Middleware } from "./middleware/x402";
app.use("/api/paid", x402Middleware({ channelId: process.env.OZ_CHANNEL_ID! }));
Payment Setup
- USDC (SEP-41 SAC) on
stellar:testnet/stellar:pubnet - OZ Channels facilitator for x402
- MPP Charge mode: per-request SAC
- MPP Channel mode: off-chain commits for high-frequency traffic
What ships with it
1 file 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.
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.
- 10d ago First seen · 31 lines · 38 tokens per session scan A 199ad5bb2f78
agentic-payments is a skill published in the GitHub repository rylsherdamz-rgb/stellar-forge (17 stars, last pushed yesterday), licensed MIT. It adds 38 tokens to every session and 236 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 2026-08-30.
Other skills, from other repositories
nirium-agentic-payments
Scaffold and run an x402 paid API server on Stellar with open-source client libraries: charge AI agents per API call with x402Serve(), a function from the nirium SDK that runs entirely on your own server, scaffold that server with nirium-cli in one command, and separately read live protocol data through the nirium-mcp…
rail402-cli
Discover and pay for x402 APIs on Stellar from the command line. Use when an agent needs to find a paid API in the x402 Bazaar, pay for an API call with USDC on Stellar testnet, fund a testnet wallet, or look up an x402 settlement on the explorer — via the rail402 CLI.
x402-stellar-payments
Use when asked to "pay for" a URL, add a "paid endpoint", handle HTTP 402, or work with x402 payments on Stellar.
buy-x402
Buy from any x402-gated endpoint. Start with go — it probes, detects the offer type, and runs the right flow. Expert flows underneath: pay for one-shot HTTP services (single authorization, no sidecar), pay-agent for one-shot streaming agent calls, and buy for long-running paid inference (pre-authorized batch via…
ethereum-local-wallet
Execute Ethereum transactions NOW — send ETH, approve tokens, call contracts, sign messages. Uses the in-cluster remote-signer (agents never touch private keys). Use this skill whenever the user wants to DO something onchain, not just learn about wallets.
gas
Current Ethereum gas prices, transaction costs, and the real economics of building on Ethereum today. Use when estimating costs, choosing between mainnet and L2s, or when a user asks about Ethereum being expensive. Counters the.