# Gate402

> x402 machine-to-machine payment gateway with pay-per-call agent APIs. Finance/crypto data for trading agents — on-chain wallet & token intelligence, DEX price/liquidity/arbitrage, market news + sentiment, SEC EDGAR filings — plus web scraping (URL→Markdown), token compression, and semantic caching. Settled in USDC over HTTP 402 (Base/Polygon/Arbitrum/Solana), or by card via Stripe MPP / an API key. No signup. Also available as an MCP server: `npx -y gate402-mcp`.

## Endpoints
- [nodeproxy](https://gate402.app/v1/proxy): POST /v1/proxy — Fetch any public URL, render client-side JS, strip nav/ads, return clean LLM-ready Markdown. Price: $0.002 USDC.
- [nodeproxy-stealth](https://gate402.app/v1/proxy/stealth): POST /v1/proxy/stealth — Hardened headless fetch for JS-heavy / lightly-protected pages. (Full residential-proxy + CAPTCHA anti-bot bypass activates when proxy credentials are configured; best-effort otherwise.) Price: $0.05 USDC.
- [tokensqueezer](https://gate402.app/v1/minify): POST /v1/minify — Compress text: strip filler, collapse JSON, densify prose. Cuts upstream LLM token spend ~40%. Price: $0.005 USDC.
- [onchain_intel](https://gate402.app/v1/onchain): POST /v1/onchain — On-chain wallet & token intelligence on Base: native + ERC-20 balances, EOA/contract detection, tx count, and token metadata. From public RPC. Price: $0.01 USDC.
- [dex_market](https://gate402.app/v1/dex): POST /v1/dex — Live DEX price, liquidity, and 24h volume for a Base token across its trading pairs. Price: $0.01 USDC.
- [news_signal](https://gate402.app/v1/news): POST /v1/news — Recent news headlines + heuristic bull/bear sentiment for a ticker or topic. Price: $0.02 USDC.
- [edgar_filings](https://gate402.app/v1/edgar): POST /v1/edgar — Latest SEC EDGAR filings (10-K/10-Q/8-K) for a US ticker or CIK, with document links. Price: $0.02 USDC.
- [vectorcache](https://gate402.app/v1/dedup): POST /v1/dedup — Semantic vector cache: exact-match Map shortcut, then 0.88 cosine similarity on hash embeddings. Sub-10ms hits. Price: $0.001 hit / $0.003 miss USDC.

## For autonomous agents
- Discover + pay programmatically via the CDP x402 Bazaar (all endpoints listed) or the machine-readable manifests below.
- MCP: add `gate402` (`npx -y gate402-mcp`) to Claude / Cursor / Cline / LangChain / CrewAI (via MCP adapters) — 11 tools, free-credit key auto-claimed on first use.

## Discovery
- [Catalog](https://gate402.app/v1): machine-readable endpoints + schemas
- [x402 manifest](https://gate402.app/.well-known/x402.json)
- [Agent card](https://gate402.app/.well-known/agent.json)
- [OpenAPI](https://gate402.app/openapi.json)

## Payment
- x402: call the endpoint, get HTTP 402 with payment requirements, pay in USDC.
- API key: present `X-API-Key`; get a free-tier key at POST /v1/free-key.
- Stripe MPP: present `Authorization: Payment <token>`.