Cryptocurrency — entry 002 of 53
0x
0x's Swap API aggregates liquidity from 150+ sources across EVM chains, Solana, Tron, and Hyperliquid's HyperCore to route token trades at the best available price, alongside a companion Gasless API for sponsored, signature-only swaps. Every call now needs a key generated from the 0x Dashboard; the Free tier carries a 0.15% on-chain fee on swaps for select tokens, while paid Growth plans drop that fee to 0%.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score75
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs14/20Documentation URL provided
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/0x/"><img src="https://greatapis.com/badge/0x.svg" alt="Scored 75 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.