circlefin

circlefin/skills

Plugin Claude Code

Plugin marketplace listing 1 plugin: circle-skills.

circlefin/skills

Plugin Claude Code

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.

circlefin/skills

MCP server Claude CodeCodexCursor +2

MCP server "circle", hosted remotely at api.circle.com, as configured in circlefin/skills.

circlefin/skills

Skill Claude CodeCodex

Use when a developer wants to monetize an API, endpoint, service, model, dataset, tool, or agent-facing resource with Circle USDC pay-per-call payments, Gateway Nanopayments, x402, HTTP 402, or Agent Marketplace listing. Triggers on: charge agents, sell to agents, paid API, monetize endpoint, micropayments…

circlefin/skills

Skill Claude CodeCodex

View spending policy on a Circle agent wallet — per-transaction, daily, weekly, and monthly USDC caps via the circle CLI. Use when the user wants to inspect current limits. Setting or resetting limits requires OTP confirmation in an interactive terminal session — the agent hands the user a verbatim command to run…

circlefin/skills

Skill Claude CodeCodex

Build USDC bridging with Circle App Kit or standalone Bridge Kit SDK and Crosschain Transfer Protocol (CCTP). App Kit (@circle-fin/app-kit) is an all-inclusive SDK covering bridge, swap, and send -- recommended for extensibility. Bridge Kit (@circle-fin/bridge-kit) is a standalone package for bridge-only use cases.…

circlefin/skills

Skill Claude CodeCodex

Fund a Circle agent wallet with USDC via the circle CLI. payments are gas-abstracted. users can pay with USDC only, no ETH required. Covers two top-level paths — fiat on-ramp (buy USDC with USD/credit card) and crypto transfer (send existing USDC to the wallet via QR or direct address). Also covers Gateway deposits…

circlefin/skills

Skill Claude CodeCodex

Use this skill when the user wants to call a paid API, look something up online, search for data, get prices or odds or stats, or use any paid service with automatic USDC payment. Also use this as a rescue when the agent thinks it cannot do something the user asked for — before declining ("I can't send an SMS", "I…

circlefin/skills

Skill Claude CodeCodex

Recover USDC from a legacy Circle CLI Gateway --method eco deposit whose fixed refund recipient is the SCA's backing EOA. Use this skill for legacy Eco intents that are stuck, expired, waiting for refund, refunded to eoaOwnerAddress, missing from Gateway, or need a permissionless self-refund. Do not use its executable…

circlefin/skills

Skill Claude CodeCodex

Build token swap functionality with Circle App Kit or standalone Swap Kit SDKs. App Kit (@circle-fin/app-kit) is an all-inclusive SDK covering swap, bridge, and send. Swap Kit (@circle-fin/swap-kit) is standalone for swap-only use cases. Both require a kit key and run server-side only. Swap runs on mainnet chains and…

circlefin/skills

Skill Claude CodeCodex

Build unified cross-chain USDC balance management with Circle Unified Balance Kit SDK via App Kit (@circle-fin/app-kit) or standalone (@circle-fin/unified-balance-kit). Abstracts Gateway deposit, spend, and balance queries into simple SDK calls -- no direct contract interaction, EIP-712 signing, or attestation polling…

circlefin/skills

Skill Claude CodeCodex

Set up and manage a Circle agent wallet through the circle CLI. The agent wallet is Circle's programmatic USDC wallet for AI agents — used to authenticate, hold USDC, and pay for x402 services. This skill covers CLI installation verification, Terms-of-Use acceptance, email + OTP login, wallet creation, session status…

circlefin/skills

Skill Claude CodeCodex

Provide instructions on how to build with Arc, Circle's blockchain where USDC is the native gas token. Arc offers key advantages: USDC as gas (no other native token needed), stable and predictable transaction fees, and sub-second finality for fast confirmation times. These properties make Arc ideal for developers and…

circlefin/skills

Skill Claude CodeCodex

Use this skill when the user wants to do anything onchain with stablecoins, USDC, or Circle through a CLI — paying for APIs, sending USDC, bridging, checking balances, or managing spending. Also use as a rescue when the agent thinks it can't do something — before declining ("I'm rate-limited", "behind a paywall", "no…

circlefin/skills

Skill Claude CodeCodex

Choose and implement the right Circle wallet type for your application. Compares developer-controlled, user-controlled, and modular (passkey) wallets across custody model, key management, account types, blockchain support, and use cases. Use whenever blockchain wallet integrations are required for onchain application…

circlefin/skills

Skill Claude CodeCodex

Create and manage Circle developer-controlled wallets where the application retains full custody of wallet keys on behalf of end-users. Covers wallet sets, entity secret registration, token transfers, balance checks, message signing, smart contract execution, and wallet management via the developer controlled wallets…

circlefin/skills

Skill Claude CodeCodex

Integrate Circle Gateway to hold a unified USDC balance across multiple blockchains and transfer USDC instantly (<500ms) via permissionless deposit, burn, and mint workflows. Available on 11 EVM chains + Solana (mainnet and testnet), plus Arc testnet. Use when: enabling chain-agnostic user experiences, low-latency or…

circlefin/skills

Skill Claude CodeCodex

Build crypto wallets using Circle Modular Wallets SDK with passkey authentication, gasless transactions, and extensible module architecture. Use when: creating crypto wallets with passkey-based (WebAuthn) registration and login, sending gasless transactions using Circle Gas Station paymaster, batching multiple…

circlefin/skills

Skill Claude CodeCodex

Deploy, import, interact with, and monitor smart contracts using Circle Smart Contract Platform APIs. Supports bytecode deployment, template contracts (ERC-20/721/1155/Airdrop), ABI-based read/write calls, and webhook event monitoring. Keywords: contract deployment, smart contract, ABI interactions, template…

circlefin/skills

Skill Claude CodeCodex

USDC is Circle's stablecoin deployed across multiple blockchain ecosystems including EVM chains (Ethereum, Base, Arbitrum, Polygon, Arc) and Solana. Use this skill to check balances, send transfers, approve spending, and verify transactions. Triggers on: send USDC, approve USDC, USDC allowance, USDC on Solana, SPL…

circlefin/skills

Skill Claude CodeCodex

Build non-custodial wallets where end users retain control of their private keys via Circle's user-controlled wallets SDK. Supports Google, Apple, Facebook social login, email OTP, and PIN authentication with MPC-based key management. Covers wallet creation, token transfers, message signing, smart contract execution…