OneSource
onesource.io
OneSource unifies blockchain data behind a single agent-native API. Ask in natural language or REST, pay with x402, MPP, or use an API key.
USDCBase
0x Swap API
0x.org
0x is a DEX aggregation API for token swaps. Its agent endpoint sells swap price and quote calls per request over x402, with no API key.
Crypto payment details
- Payment protocol
- x402
- Networks
- Base, Solana
- Tokens
- USDC (also via Circle Gateway)
- Typical price per call
- $0.01 per call (check the provider for current pricing)
- Example paid endpoint
https://agent.api.0x.org/v1/x402/swap-allowance-holder-price/{path}- Listed in
- x402scan
How we verified it
Unpaid GET /v1/x402/swap-allowance-holder-price/… returned HTTP 402 on 2026-10-21 with x402 payment terms: x402 v2, 10000 (0.01 USDC) on Base and Solana; also Circle Gateway batched and a batch-settlement scheme on Base. Listed on x402scan. Homepage fetched (HTTP 200). Last checked 2026-10-21.
The description summarizes the provider's own site. YourAITools is not affiliated with 0x Swap API. Listing a tool is not an endorsement: check pricing and terms with the provider before paying.
Is this your tool? Update the listing or get it featured. Paid endpoint checks are coming soon.