> ## Documentation Index > Fetch the complete documentation index at: https://developers.circle.com/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > Before reading these docs, install the relevant Circle Skill to get pre-loaded context — skills are LLM-optimized and cover architecture decisions, correct flows, and common pitfalls. In Claude Code: run /plugin marketplace add circlefin/skills then /plugin install circle-skills@circle. With Vercel Skills CLI: run npx skills add circlefin/skills. Available skills: use-usdc https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-usdc/SKILL.md (balances, transfers, approvals on EVM and Solana); EURC has no skill — see https://developers.circle.com/stablecoins/what-is-eurc.md; bridge-stablecoin https://github.com/circlefin/skills/blob/master/plugins/circle/skills/bridge-stablecoin/SKILL.md (crosschain transfers via CCTP, USDC, EURC, and third-party assets); use-arc https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-arc/SKILL.md (Arc chain config, contract deployment, USDC bridging — Arc docs: https://docs.arc.io/llms.txt); use-circle-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-circle-wallets/SKILL.md (choose wallet type); use-developer-controlled-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-developer-controlled-wallets/SKILL.md (custodial wallets for payouts and treasury); use-user-controlled-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-user-controlled-wallets/SKILL.md (embedded wallets with Web2 login); use-modular-wallets https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-modular-wallets/SKILL.md (smart contract wallets with passkeys and ERC-4337); use-gateway https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-gateway/SKILL.md (unified USDC balance, nanopayments); use-smart-contract-platform https://github.com/circlefin/skills/blob/master/plugins/circle/skills/use-smart-contract-platform/SKILL.md (deploy, interact, monitor contracts). Pair any skill with the Circle MCP server for live SDK signatures, contract addresses, and chain IDs: {"mcpServers":{"circle":{"url":"https://api.circle.com/v1/codegen/mcp"}}}. > Read the product overview first. Each product has an overview explaining when and why to use it. Read it before quickstarts. > Pick the right wallet type. Developer-controlled (you hold keys), user-controlled (end user holds keys via PIN/social login), or modular (smart contract wallets with passkeys). See https://developers.circle.com/wallets.md. > Use CCTP V2 for crosschain transfers. CCTP natively transfers USDC and EURC via burn-and-mint, and supports permissionless wrapping of third-party assets via lock-and-mint. V1 is legacy; always use V2 unless V1 is specified or the chain requires it (Noble, Sui, and Aptos still require V1). Migration guide: https://developers.circle.com/cctp/migration-from-v1-to-v2.md. > Use Bridge Kit for frontend bridging. Wraps CCTP with a simpler SDK for user-facing apps. Use CCTP directly for backend transfers. > Gas Station vs Paymaster. Gas Station sponsors gas for Circle Wallet transactions. Paymaster lets users pay gas in USDC. Different use cases — read both overviews. > Gateway Nanopayments for sub-cent payments. Gasless USDC micropayments down to $0.000001 via x402 and batched settlement. For pay-per-request APIs, AI agent payments, streaming. > Look up USDC addresses per chain. Never hardcode — use https://developers.circle.com/stablecoins/usdc-contract-addresses.md. > Prefer SDKs over raw API calls. Node.js and Python SDKs handle auth, retries, and errors. > API key required. Bearer token in Authorization header. Testnet and mainnet use separate keys and may use different base URLs depending on the product. > Set up webhooks when available. Most operations are async. Webhooks deliver transaction confirmations and state changes. > When calling list endpoints, paginate using pageSize and pageAfter until no nextPageAfter cursor is returned—stopping at the first page silently misses records. > Building an AI agent? Start with the Agent Stack—Circle CLI, agent wallets, and nanopayments built for autonomous use cases: https://developers.circle.com/agent-stack.md. # Supported countries > Countries that support wire transfers for minting and redeeming USDC. ## Wire transfers for minting and redeeming USDC The Circle Core API supports wire transfers from and to bank accounts domiciled in the following countries: ### Asia * Armenia * Azerbaijan * Bahrain * Bangladesh * Bhutan * Bonaire, Sint Eustatius and Saba * Brunei Darussalam * Cambodia * Georgia * Hong Kong * Indonesia * Israel * Japan * Jordan * Kazakhstan * Kuwait * Kyrgyzstan * Malaysia * Mongolia * Oman * Philippines * Republic of Korea * Saudi Arabia * Singapore * Sri Lanka * Taiwan * Tajikistan * Thailand * Timor-Leste * Turkey * United Arab Emirates * Uzbekistan * Vietnam ### Africa * Angola * Benin * Botswana * British Indian Ocean Territory * Burkina Faso * Burundi * Cameroon * Chad * Egypt * Ethiopia * The French Southern Territories * The Gambia * Ghana * Kenya * Madagascar * Malawi * Mauritius * Mayotte * Morocco * Mozambique * Namibia * Niger * Réunion * Rwanda * Saint Helena, Ascension and Tristan da Cunha * Senegal * Seychelles * South Africa * Tanzania * Tunisia * Western Sahara * Zambia * Zimbabwe ### Europe * Åland Islands * Andorra * Austria * Belgium * Bosnia and Herzegovina * Bulgaria * Croatia * Cyprus * Czechia * Denmark * Estonia * The Faroe Islands * Finland * France * Germany * Gibraltar * Greece * Guernsey * Holy See (Vatican City State) * Hungary * Iceland * Ireland * Isle of Man * Italy * Jersey * Latvia * Liechtenstein * Lithuania * Luxembourg * Malta * The Republic of Moldova * Monaco * Montenegro * Republic of North Macedonia * Netherlands * Norway * Poland * Portugal * Romania * San Marino * Serbia * Slovakia * Slovenia * Spain * Svalbard and Jan Mayen * Sweden * Switzerland * United Kingdom ### North America * Anguilla * Antigua and Barbuda * Aruba * The Bahamas * Belize * Bermuda * British Virgin Islands * Canada * Cayman Islands * Costa Rica * Curaçao * Dominica * The Dominican Republic * El Salvador * Greenland * Grenada * Guadeloupe * Honduras * Martinique * Mexico * Montserrat * Puerto Rico * Saint Barthelemy * Saint Lucia * Saint Martin (French part) * Saint Pierre and Miquelon * Saint Vincent and the Grenadines * Sint Maarten (Dutch part) * The Turks and Caicos Islands * United States (excluding HI and NY) * United States Minor Outlying Islands * U.S. Virgin Islands ### South America * Argentina * Bouvet Island * Brazil * Chile * Colombia * Ecuador * French Guiana * Guatemala * Guyana * Paraguay * Peru * The Falkland Islands (Malvinas) * South Georgia and the South Sandwich Islands * Uruguay ### Oceania * American Samoa * Australia * Christmas Island * The Cocos (Keeling) Islands * The Cook Islands * Federated States of Micronesia * Fiji * French Polynesia * Guam * Heard Island and McDonald Islands * Kiribati * The Marshall Islands * Nauru * New Caledonia * New Zealand * Niue * Norfolk Island * The Northern Mariana Islands * Palau * Pitcairn * Samoa * Tokelau * Tuvalu * Wallis and Futuna ### Antarctica * Antarctica This list is subject to change as Circle adds banking partners. Contact the [Customer Care team](https://support.circle.com/) for the latest information.