A paid tool that checks ETH and USDC balances for a Base blockchain address and explains how to fund it. Base is a network used for Ethereum-compatible transactions.

Checking balances and getting instructions for sending ETH or USDC to a Base address. Each call costs $0.01 USDC.

It shows whether an address has the currency needed for transaction fees or paid service calls and explains the next funding steps.

pinion-fund — Skill for Claude Code by chu2bard/pinion-os

Install

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.

Any agent

npx skills add chu2bard/pinion-os --skill fund

Clone the repo

git clone --depth 1 https://github.com/chu2bard/pinion-os

Made for: Claude Code.

Or install pinion-os, the plugin that ships this one along with the rest of its 10 skills.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/chu2bard/pinion-os/fund/github.svg)](https://agentmods.dev/skills/chu2bard/pinion-os/fund)

Your own site

<a href="https://agentmods.dev/skills/chu2bard/pinion-os/fund"><img src="https://agentmods.dev/badge/skills/chu2bard/pinion-os/fund/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/chu2bard/pinion-os/fund"><img src="https://agentmods.dev/badge/skills/chu2bard/pinion-os/fund.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 539 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00031	$0.00539
Opus 5.5	$0.00012	$0.00216
Sonnet 5.5	$0.00006	$0.00108
Haiku 4.5	$0.00003	$0.00054

Measured 1mo ago against content hash c4630423aa73, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pinion-fund scanned grade A with 1 finding 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 1mo 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl https://pinionos.com/skill/fund/0x101Cd32b9bEEE93845Ead7Bc604a5F1873330acf

skills/fund/SKILL.md · 66 lines

What it actually says

Fund

Returns ETH and USDC balances for any Base address along with step-by-step funding instructions and minimum recommended amounts.

Endpoint

GET https://pinionos.com/skill/fund/:address

Price: $0.01 USDC per call (x402 on Base)

Parameters

Parameter	Type	Required	Description
address	string	yes	Ethereum address (0x, 40 hex chars)

Example Request

curl https://pinionos.com/skill/fund/0x101Cd32b9bEEE93845Ead7Bc604a5F1873330acf

The first request returns HTTP 402 with payment requirements. Sign a USDC TransferWithAuthorization (EIP-3009) and retry with the X-PAYMENT header.

Example Response

{
  "address": "0x101Cd32b9bEEE93845Ead7Bc604a5F1873330acf",
  "network": "base",
  "chainId": 8453,
  "balances": {
    "ETH": "0.001200",
    "USDC": "5.00"
  },
  "depositAddress": "0x101Cd32b9bEEE93845Ead7Bc604a5F1873330acf",
  "funding": {
    "steps": [
      "Buy ETH on any exchange (Coinbase, Binance, etc.)",
      "Withdraw ETH to the address above on the Base network",
      "Swap some ETH to USDC using the /trade skill or any DEX",
      "ETH is needed for gas, USDC is needed for x402 payments"
    ],
    "minimumRecommended": {
      "ETH": "0.001 ETH (for gas fees)",
      "USDC": "1.00 USDC (for ~100 skill calls at $0.01 each)"
    },
    "bridgeUrl": "https://bridge.base.org"
  },
  "timestamp": "2026-02-16T12:00:00.000Z"
}

When to Use

Check if an agent wallet has enough funds to operate.
Get instructions for funding a new wallet.
Determine if bridging or swapping is needed before running other skills.

Changes

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.

1mo ago First seen · 66 lines · 31 tokens per session scan A c4630423aa73

Subscribe to this mod's changes

pinion-fund is a skill published in the GitHub repository chu2bard/pinion-os (97 stars, last pushed 8mo ago), licensed MIT. It adds 31 tokens to every session and 539 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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pinion-fund