# Chain API Documentation

Build modern financial products with Chain's unified API. Move money, issue cards, and manage wallets — all backed by stablecoin infrastructure.

## Quick Start

Make your first API call in under a minute.

### cURL

```
curl https://api.chain.com/v1/wallets \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{"currency": "USDC", "label": "Treasury"}'
```

## Core APIs

[**Payments**  \
Fund accounts and send payouts globally with fiat-to-stablecoin conversion.  \
\  \
POST /v1/funding POST /v1/payouts POST /v1/payees](/content/documentation/payments/index.html)  
[**Cards**  \
Issue and manage virtual and physical debit cards powered by stablecoin balances.  \
\  \
GET /v1/cards POST /v1/cards](/content/documentation/cards/index.html)  
[**Wallets**  \
Register and manage crypto wallets with compliance screening.  \
\  \
GET /v1/wallets POST /v1/wallets](/content/documentation/wallets/index.html)  
[**Ledger**  \
Double-entry accounting ledger for tracking all financial movements.  \
\  \
GET /v1/ledger](/content/documentation/ledger/index.html)

## Platform Tools

[**Authentication**  \
API keys, Bearer tokens, and rate limits.](/content/documentation/authentication/index.html)  
[**Webhooks**  \
Real-time event notifications with signature verification.](/content/documentation/webhooks/index.html)  
[**SDKs**  \
Official client libraries for Node.js and Python.](/content/documentation/sdks/index.html)  
[**Errors**  \
Comprehensive error codes and handling guide.](/content/documentation/errors/index.html)

## Base URLs

Production `https://api.chain.com/v1`

Sandbox `https://sandbox.chain.com/v1`

Pax Dollar

USDP

Ripple USD

RLUSD

Dollar

USD

Tether

USDT

Pounds

GBP

Euro

EUR