Get an API key

Self-serve, live in seconds. Your key is shown once — save it somewhere safe. Start with a test key (simulated swaps, no real funds) and switch to live when you're ready.

Email Key label (optional) Mode

Testsandbox

Simulated swaps. No real money. Perfect to build against.

Livereal

Real swaps on the real engine. 0% markup.

By creating a key you agree to use the API responsibly. Test keys never move real funds. We never hold your keys or wallets — the API is non-custodial.

API key

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Webhook signing secret

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Next: make your first call

# quote (no key needed)
curl "https://cryptoexchanger.co/api/v1/estimate?from=BTC&to=ETH&amount=0.05"

# create a swap (uses your key)
curl -X POST https://cryptoexchanger.co/api/v1/exchange \
  -H "Authorization: Bearer cx_..._..." \
  -H "Idempotency-Key: order-001" \
  -d '{"from":"BTC","to":"ETH","amount":0.05,"address":"0xRecipient...","refundAddress":"bc1qRefund..."}'

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