# Chain

> Chain is a stablecoin payments infrastructure platform that lets enterprises move money globally across traditional banking rails and digital-currency networks. Its unified REST API covers funding, payouts and payees, virtual and physical card issuing, wallet registration with compliance screening, and a double-entry ledger. Chain connects ACH, Fedwire, FedNow, SEPA, Faster Payments, Visa and Mastercard with multi-stablecoin support (USDC, USDT, USDP, RLUSD).

This llms.txt was generated by the API Evangelist enrichment pipeline from the Chain apis.yml and repo artifacts. It was not published by Chain.

## API

- [Chain API documentation](https://chain.com/documentation): Unified REST API for stablecoin payments, cards, wallets and ledger.
- [API base URL](https://api.chain.com/v1): Production host (v1).
- [Authentication](https://chain.com/documentation/authentication): Bearer API keys (sk_live_ / sk_sandbox_), X-Idempotency-Key and X-Business-Id headers.
- [Webhooks](https://chain.com/documentation/webhooks): Real-time event notifications with signature verification.
- [SDKs](https://chain.com/documentation/sdks): Official Node.js and Python client libraries.

## Developers

- [Changelog](https://chain.com/developers/changelog): Dated product update newsletter.
- [Status](https://chain.com/developers/status): Live system status for API, webhooks, transfers, cards and sandbox.
- [App / Sign up](https://app.chain.com): Chain dashboard.
- [GitHub organization](https://github.com/chain): Chain open-source repositories.

## Company

- [Website](https://chain.com)
- [Blog](https://chain.com/blog)
- [Support](https://chain.com/support)
- [Terms of Service](https://chain.com/terms)
- [Privacy Policy](https://chain.com/privacy-policy)

## Enrichment artifacts

- [Packages / SDKs](packages/chain-packages.yml)
- [Authentication profile](authentication/chain-authentication.yml)
- [API conventions](conventions/chain-conventions.yml)
- [Lifecycle](lifecycle/chain-lifecycle.yml)
- [Changelog](changelog/chain-changelog.yml)
- [Sandbox](sandbox/chain-sandbox.yml)
- [Domain security](security/chain-domain-security.yml)