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 Parad0x-Labs/openclaw-skills --skill payment-sessiongit clone --depth 1 https://github.com/Parad0x-Labs/openclaw-skillsWrote 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/parad0x-labs/openclaw-skills/payment-session)<a href="https://agentmods.dev/skills/parad0x-labs/openclaw-skills/payment-session"><img src="https://agentmods.dev/badge/skills/parad0x-labs/openclaw-skills/payment-session/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/parad0x-labs/openclaw-skills/payment-session"><img src="https://agentmods.dev/badge/skills/parad0x-labs/openclaw-skills/payment-session.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 | $0.00049 | $0.00601 |
| Opus 5 | $0.00024 | $0.00300 |
| Sonnet 5 | $0.00010 | $0.00120 |
| Haiku 4.5 | $0.00005 | $0.00060 |
Grade A, and why
payment-session 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
Payment Session
x402 is discrete per-call. This adds the two billing shapes it lacks, settled in batches through x402 so you pay one transaction per settlement (not per tick — the only economical way to bill micro-usage given fees + ATA rent):
- metered (pay-as-you-go): accrue per-use charges, settle when they cross a threshold.
- subscription (streaming): charge a fixed amount every period.
Pure accounting — it never moves money or holds a key. It tells the agent when
and how much to settle; the agent pays via x402-pay's pay_x402. A hard
maxTotalUsdc lifetime cap bounds every session, so a runaway stream can't drain
past it.
Tools
| Tool | Does |
|---|---|
open_payment_session |
start a metered or subscription session with a maxTotalUsdc cap |
meter_usage |
accrue pay-as-you-go usage (metered sessions) |
check_settlement_due |
is a payment due, and for how much? (amount is capped at remaining budget) |
record_settled |
record a paid settlement after pay_x402 succeeds |
close_payment_session |
close; returns any final remainder to settle |
The loop
open_payment_session(payee, mode, cap)
metered: meter_usage(...) → check_settlement_due → if due: pay_x402(payee, amount) → record_settled
subscription: (time passes) → check_settlement_due → if due: pay_x402(payee, amount) → record_settled
close_payment_session → settle any remainder
Trust model
- Non-custodial. This plugin only does accounting; the actual USDC settlement
is
pay_x402(your own wallet signs). It never holds a key or moves funds. - Capped. Every session carries a hard
maxTotalUsdc;check_settlement_duenever returns an amount above the remaining budget.
Pairs with x402-pay (settlement) and
web0-onboard (identity + endpoint).
What ships with it
10 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 · 54 lines · 49 tokens per session scan A 29e910e7ceca
payment-session is a skill published in the GitHub repository Parad0x-Labs/openclaw-skills (22 stars, last pushed 7d ago), licensed MIT. It adds 49 tokens to every session and 601 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.
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