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 circlefin/skills --skill fund-agent-walletgit clone --depth 1 https://github.com/circlefin/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/circlefin/skills/fund-agent-wallet)<a href="https://agentmods.dev/skills/circlefin/skills/fund-agent-wallet"><img src="https://agentmods.dev/badge/skills/circlefin/skills/fund-agent-wallet/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/circlefin/skills/fund-agent-wallet"><img src="https://agentmods.dev/badge/skills/circlefin/skills/fund-agent-wallet.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk warn
- NVIDIA SkillSpector warn
SkillSpector: 2 findings, 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 Excessive Agency · line 133 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
- medium Excessive Agency · line 152 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00169 | $0.03236 |
| Opus 5 | $0.00084 | $0.01618 |
| Sonnet 5 | $0.00034 | $0.00647 |
| Haiku 4.5 | $0.00017 | $0.00324 |
Grade A, and why
fund-agent-wallet 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 — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
For an overview of the Circle CLI's full capability set — bridging, smart contract execution, x402 payment, and more — see the use-circle-cli master skill. This skill is the narrower funding flow.
Funding an agent wallet means putting USDC where the CLI can spend it. There are two balance pools to be aware of:
- On-chain (vanilla x402) — USDC sitting at the wallet address on a specific chain. Each chain is separate. Used to pay endpoints whose
accepts[]does not includeGatewayWalletBatched. Settles in one block. - Nanopayments (powered by Gateway) — USDC held off-chain in your Circle Gateway balance, batched and settled for you across supported chains. Per source chain — no cross-chain pooling at payment time. Used to pay endpoints whose
accepts[]includesGatewayWalletBatched. Settles in <500ms once the balance exists.
Gas note
Agent wallet payment flows are gas-abstracted — users can pay with USDC without pre-funding native gas.
This skill covers funding both pools. Pick the path with the shortest time-to-result and hide chain complexity from the user.
Prerequisites
# Confirm session is good
circle wallet status
# Get the wallet address
circle wallet list --chain BASE --type agent --output json
# Check current on-chain balance (per chain)
circle wallet balance --address <addr> --chain BASE --output json
# Check current Gateway balance (per chain)
circle gateway balance --address <addr> --chain BASE --output json
If circle wallet status errors with "Not logged in" or "Terms acceptance is required", hand off to the use-agent-wallet skill — it covers install, terms, login, and wallet creation.
Step 1 — Pick a funding path
Ask the user: "How would you like to fund your wallet?"
- Fiat (USD or local currency) — Buy USDC with a card or bank transfer via the CLI's built-in fiat on-ramp. Best for users who don't have crypto yet.
- Existing USDC — Send USDC from a wallet they already have (MetaMask, Coinbase, Phantom, etc.). Faster and free of on-ramp fees.
- Gateway deposit (advanced) — Move existing on-chain USDC into the Gateway balance for low-latency batched payments. Only useful if the seller they're paying supports Gateway on a specific chain.
What ships with it
3 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 · 198 lines · 169 tokens per session scan A dd0ed0aae2ae
fund-agent-wallet is a skill published in the GitHub repository circlefin/skills (147 stars, last pushed 27d ago), licensed Apache-2.0. It adds 169 tokens to every session and 3,236 once invoked, about $0.0008 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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