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SkillMaxx / Development / Circle Skills
Circle Skills
Ship stablecoin apps faster. Best-practice skills for USDC payments, cross-chain transfers, wallets, and smart contracts — plus Circle's MCP server for real-time SDK and documentation guidance.
- GitHub
- circlefin/skills ↗
- Stars
- ★ 155
- Last updated
- Hands-on tests
- Tested ✓ in 2 of 5
Install
Tested ✓✓ Verified from docsOfficial docs ↗
/plugin install circle-skills@claude-plugins-officialTested ✓ on 2026-10-16: installed and loaded in a throwaway sandbox with no credentials.
Log excerpt
Installing plugin "circle-skills@claude-plugins-official"...✔ Successfully installed plugin: circle-skills@claude-plugins-official (scope: user)
$ verify:
❯ circle-skills@claude-plugins-official
Status: ✔ enabled1 run, latest 2026-10-16
Not yet tested
No official Codex instructions yet. We haven't found docs saying this works in Codex.
Know it works? Tell us →Tested ✓✓ Verified from docsOfficial docs ↗
Auto-loaded from your Claude Code plugins (no extra setup per xAI docs)Tested ✓ on 2026-10-16: installed and loaded in a throwaway sandbox with no credentials.
Log excerpt
Installed 1 plugin(s) from claude-plugins-official: circle $ verify: circle-44ec9eb7: circle [git: https://github.com/circlefin/skills.git] (claude-plugins-official)
1 run, latest 2026-10-16
Not yet tested
No official Cursor instructions yet. We haven't found docs saying this works in Cursor.
Know it works? Tell us →Not yet tested
No official Pi instructions yet. We haven't found docs saying this works in Pi.
Know it works? Tell us →README
View on GitHub ↗Circle Skills
Ship stablecoin apps faster with Circle Skills: best-practice guidance for USDC payments, crosschain transfers, wallets, and smart contracts, plus Circle's MCP server for real-time SDK and documentation context.
Installation
Claude Code
/plugin marketplace add circlefin/skills
/plugin install circle-skills@circle
Vercel Skills CLI
npx skills add circlefin/skills
Skills
| Skill | Description |
|---|---|
accept-agent-payments |
Monetize an HTTP endpoint for agents with USDC pay-per-call payments. Defaults to Gateway Nanopayments, covers x402 seller integration, paid-call verification, and Agent Marketplace listing prep. |
use-usdc |
Interact with USDC on EVM chains and Solana. Check balances, send transfers, approve spending, and verify transactions. |
bridge-tokens |
Browser- and server-side crosschain token transfers. Bridges USDC across CCTP chains (EVM + Solana) and CCTPx registry aliases or token IDs on their supported EVM routes through one kit.bridge() call. Includes wallet-provider adapters, UX patterns, progress tracking, and App Kit or Bridge Kit implementation. |
use-arc |
Build on Arc, Circle's blockchain where USDC is the native gas token. Covers chain configuration, contract deployment, and bridging USDC to Arc via CCTP. |
use-circle-wallets |
Choose the right Circle wallet type. Compares developer-controlled, user-controlled, and modular (passkey) wallets across custody model, key management, and use cases. |
use-developer-controlled-wallets |
Developer-controlled wallets for custodial flows like payouts, treasury management, and automation. Developers manage wallet creation and key storage. |
use-gateway |
Unified USDC balance across chains with instant crosschain transfers (<500ms). Supports EVM and Solana with deposit, balance query, and transfer workflows. |
unify-balance |
Manage a unified cross-chain USDC balance in browser or server apps with Unified Balance Kit (or App Kit). Abstracts Gateway deposit, spend, and balance queries across EVM and Solana into simple SDK calls. |
use-modular-wallets |
Smart contract wallets with passkey authentication, gasless transactions, and modular architecture. Supports ERC-4337 account abstraction. |
use-smart-contract-platform |
Deploy, import, interact with, and monitor smart contracts using Circle's Smart Contract Platform. Supports bytecode deployment, template contracts (ERC-20/721/1155), ABI-based read/write calls, and event monitoring. |
use-user-controlled-wallets |
Embedded wallets where users control their own assets. Supports Web2-like login (Google, Facebook, Apple, email OTP, PIN) without seed phrases. |
swap-tokens |
Build keyless token swaps in browser or server apps with App Kit or standalone Swap Kit. Supports wallet-provider adapters, same-chain and direct cross-chain swaps, slippage, status tracking, and custom fees. |
buy-crypto |
Embed Circle's hosted "buy crypto with card or bank" onramp widget in a web app with App Kit (kit.onramp) or standalone Onramp Kit. Covers the server session-minting route, inline iframe and popup widget modes, sandbox vs production wiring, widget-origin matching, CSP, KYB for card payments, and lifecycle events. |
use-circle-cli |
Master skill for the Circle CLI (@circle-fin/cli) — a holistic stablecoin CLI for AI agents. Covers the full command surface (wallet, bridge, gateway, services, contract, transaction, skill, terms, blockchain, telemetry) at a high level and routes to dedicated agent-wallet skills for deep flows. Use this as the front door whenever the user is exploring or doing CLI work that doesn't fit a narrower skill yet. |
use-agent-wallet |
Set up and manage a Circle agent wallet via the circle CLI. Covers install verification, Terms-of-Use acceptance, email + OTP login, wallet creation, session status, and balance inspection — the bootstrap surface for AI agents using Circle to pay for x402 services. |
pay-via-agent-wallet |
Pay for paid x402 services via the Circle agent wallet. Covers the discover → inspect → pay flow with chain selection guidance for Gateway and vanilla x402 schemes, including common gotchas like seller-driven chain rejection and provider-specific schema validation. |
fund-agent-wallet |
Fund a Circle agent wallet with USDC: built-in fiat on-ramp, crypto transfer via browser-rendered QR, and Gateway deposits (eco vs direct) for the Nanopayments balance. Includes funding-method decision guidance and same-chain withdraw. |
recover-eco-funds |
Diagnose and recover USDC from a legacy Circle CLI Eco deposit through an evidence-first self-refund and backing-EOA sweep with onchain verification and explicit approvals. |
agent-wallet-policy |
View spending limits (per-tx, daily, weekly, monthly) on a Circle agent wallet in-agent. Setting or resetting limits is OTP-gated — the agent hands the user a verbatim command to run in their own terminal so the OTP never passes through agent storage. Mainnet only. |
Preview from the source repo. Images are removed.
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