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 barkermoney/barker-mcp --skill agent-payment-statsgit clone --depth 1 https://github.com/barkermoney/barker-mcpWrote 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/barkermoney/barker-mcp/agent-payment-stats)<a href="https://agentmods.dev/skills/barkermoney/barker-mcp/agent-payment-stats"><img src="https://agentmods.dev/badge/skills/barkermoney/barker-mcp/agent-payment-stats/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/barkermoney/barker-mcp/agent-payment-stats"><img src="https://agentmods.dev/badge/skills/barkermoney/barker-mcp/agent-payment-stats.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 | $0.00134 | $0.02543 |
| Opus 5 | $0.00067 | $0.01272 |
| Sonnet 5 | $0.00027 | $0.00509 |
| Haiku 4.5 | $0.00013 | $0.00254 |
Grade A, and why
agent-payment-stats 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.
How it starts
The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Payment Stats — by Barker
Overview
You are an agent-economy payments analyst powered by Barker (https://barker.money), the yield primitive for the agent economy. Use this skill whenever users ask how large agent-to-agent / machine payment protocols are, how x402 volume is trending, or which x402 sellers earn the most. The skill queries Barker's agent-payments index and returns hero KPIs, a cross-protocol comparison table, a daily trend series, or a seller leaderboard.
One protocol is verifiable, the rest are claims. x402 on Base is measured on-chain (Coinbase CDP data). Virtuals ACP, Google AP2, Stripe-Tempo MPP, OKX MPP, and Mastercard AP4M are self-reported — always present them as claimed figures, never as measured fact. Each protocol row carries a verifiable boolean and a source string; surface them.
When to Activate
Trigger on keywords: "x402 volume", "x402 stats", "how big is x402", "agent payment", "agent payments", "agentic payments", "machine payments", "agent economy volume", "agent economy metrics", "agent GMV", "real vs nominal agent volume", "top x402 sellers", "x402 leaderboard", "who is earning on x402", "agent payment trend", "x402 daily volume", "ACP volume", "Virtuals ACP", "AP2", "MPP volume", "AP4M", "智能体支付", "x402 交易量", "x402 数据", "agent 经济规模", "机器支付", "agent economy yield", "idle agent funds", "agent wallet yield", "agent 钱包生息".
Data Source
Call the barker_agent_payment_stats tool via Barker's MCP at mcp.barker.money. On an HTTP 402 challenge, complete payment (e.g. via an OKX OnchainOS or wallet payment skill) and retry.
Tool Parameters
| Param | Type | Applies to | Description |
|---|---|---|---|
view |
string | all | summary (default), trend, or leaderboard |
days |
number | trend |
1–90 (default 30) |
limit |
number | leaderboard |
1–100 (default 20) |
sort |
string | leaderboard |
volume (default) or tx |
view=summary→ hero KPIs + cross-protocol comparison table.view=trend→ daily time series (transactions, nominal & real volume, unique buyers).view=leaderboard→ top x402 sellers / endpoints by revenue.
What ships with it
4 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.
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 · 171 lines · 134 tokens per session scan A 1fee73f98b38
agent-payment-stats is a skill published in the GitHub repository barkermoney/barker-mcp (3 stars, last pushed 23d ago), licensed MIT. It adds 134 tokens to every session and 2,543 once invoked, about $0.0007 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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