For AI Agents: The proxy endpoint returns HTTP 402 with payment instructions. Pay USDC, retry with Payment-Signature header, get credentials. 30-second quickstart.
For Humans: No signup, no API key. Buy a proxy →
One x402-gated endpoint. Request, pay USDC on-chain, retry with the tx hash.
# 1. Request a proxy (returns HTTP 402 with payment info)
curl "https://api.proxies.sx/v1/x402/proxy?country=US&traffic=1"
# 2. Send USDC to the recipient address, then retry with your tx hash
curl "https://api.proxies.sx/v1/x402/proxy?country=US&traffic=1" \
-H "Payment-Signature: YOUR_TX_HASH"
# Response: { host, httpPort, socksPort, username, password, sessionToken, expiresAt }
# 3. Use the proxy
curl -x http://USERNAME:PASSWORD@HOST:HTTP_PORT https://api.ipify.org
Save the sessionToken (x402s_...) - it authenticates all post-purchase management calls (replace ports, top up, check credit).
| Endpoint | Price | Description |
|---|---|---|
GET/POST /v1/x402/proxy | $4/GB | Real 4G/5G mobile proxy from 6 countries (US, DE, GB, FR, ES, PL). HTTP + SOCKS5, city/carrier targeting, auto IP rotation. Free port replacement (max 3) and session top-up. |
| Method | Endpoint | Purpose |
|---|---|---|
| GET | /v1/x402/manage/session | Session details |
| GET | /v1/x402/manage/session/credit | Remaining credit |
| POST | /v1/x402/manage/ports/replace | Replace offline port (free, max 3) |
| POST | /v1/x402/manage/ports/recreate | Recreate deleted port with remaining credit |
| GET | /v1/x402/manage/session/topup/calculate | Preview top-up cost |
| POST | /v1/x402/manage/session/topup | Add traffic ($4/GB) or duration (free) |
| GET | /rotate/:token | Rotate IP (no auth) |
| Type | Price/GB | Min Purchase |
|---|---|---|
| Shared | $4.00 | 0.1 GB ($0.40) |
Duration is always FREE - you only pay for traffic. Pay with USDC on Base (~2s, ~$0.01 gas) or Solana (~400ms, ~$0.0001 gas).
| Network | Recipient Wallet |
|---|---|
| Base (chainId 8453) | 0xF8cD900794245fc36CBE65be9afc23CDF5103042 |
| Solana | 6eUdVwsPArTxwVqEARYGCh4S2qwW2zCs7jSEDRpxydnv |
Share mobile/residential bandwidth and get paid in USDC. AI agents and Android SDK devices register, share bandwidth, and earn per GB. Rates by IP type (mobile > residential > datacenter), returned in earningsPerGB at registration.
| Resource | URL |
|---|---|
| Buy a proxy | /marketplace/proxy/ |
| Master skill file | /skill.md |
| LLMs reference | /llms.txt |
| x402 discovery | /.well-known/x402.json |
| Peer Network | /peer/ |
| MCP server | npx -y @proxies-sx/mcp-server |