Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/getcargohq/cargo-skillsnpx agentmods add skills/getcargohq/cargo-skills/cargo-billingWrote 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/getcargohq/cargo-skills/cargo-billing)<a href="https://agentmods.dev/skills/getcargohq/cargo-skills/cargo-billing"><img src="https://agentmods.dev/badge/skills/getcargohq/cargo-skills/cargo-billing/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/getcargohq/cargo-skills/cargo-billing"><img src="https://agentmods.dev/badge/skills/getcargohq/cargo-skills/cargo-billing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 34 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00161 | $0.04035 |
| Opus 5.5 | $0.00064 | $0.01614 |
| Sonnet 5.5 | $0.00032 | $0.00807 |
| Haiku 4.5 | $0.00016 | $0.00404 |
Grade A, and why
cargo-billing 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 — 273 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cargo CLI — Billing
Billing and credit management: pulling usage metrics, checking subscription status, viewing invoices, and managing credits.
See
references/response-shapes.mdfor full JSON response structures. Seereferences/troubleshooting.mdfor common errors and how to fix them. Seereferences/examples/usage-metrics.mdfor usage metric and subscription examples.
Bootstrap
Already signed in (cargo-ai whoami returns a workspace)? Skip to the next section.
npm install -g @cargo-ai/cli # no global install? prefix every command with `npx @cargo-ai/cli`
cargo-ai login --email [email protected] # emailed code, no browser; creates the account on first use
# alternatives: --oauth (browser) · --token <api-token> (CI)
cargo-ai whoami # confirm the active workspace before any write
Every command prints JSON to stdout; failures exit non-zero with {"errorMessage": "..."}. Anything that creates a run or a batch is async — pass --wait-until-finished or poll the matching get. Admin-only: every command in this skill requires a token with admin access on the workspace (the billing:read permission; card, plan and top-up changes need billing:write). A token without it gets a 401 {"reason":"unauthorized"}, which the CLI reports as Not authenticated: unauthorized: that is a permission gap, not an expired login. When the full skill bundle is installed, ../cargo/references/prerequisites.md adds the CLI version pin, token scopes, and the admin-only surface.
Discover resources first
Usage metrics can be filtered and grouped by resource UUID. Discover them before querying.
cargo-ai orchestration play list # all plays (name, workflowUuid)
cargo-ai orchestration tool list # all tools (name, workflowUuid)
cargo-ai ai agent list # all agents (uuid, name)
cargo-ai connection connector list # all connectors (uuid, name, integrationSlug)
cargo-ai storage model list # all models (uuid, name, slug)
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.
- 2d ago Changed 7830d37e1db4
- 3d ago Changed · +2 lines f9ceceac8eb4
- 9d ago Changed 0a787ea2fb89
- 24d ago Changed ab32a0319bc6
- 1mo ago Changed · +50 lines 88d7a9a2eff7
- 1mo ago First seen · 221 lines · 161 tokens per session scan A 4e4d351a0592
cargo-billing is a skill published in the GitHub repository getcargohq/cargo-skills (20 stars, last pushed yesterday), licensed MIT. It adds 161 tokens to every session and 4,035 once invoked, about $0.0006 per session on Opus 5.5. 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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