# Grey Ridge Signals — x402 Data & Security APIs

> Agent-native, pay-per-call data on Base (USDC via x402). No account, no API key — agents pay inline.
> Landing page: https://x402-data-api.sigrunner.workers.dev/  |  Discovery: https://x402-data-api.sigrunner.workers.dev/.well-known/x402  |  OpenAPI: https://x402-data-api.sigrunner.workers.dev/openapi.json  |  Listed on the Coinbase CDP x402 Bazaar.

## How to pay
Each paid GET returns HTTP 402 with an x402 v2 payment-required challenge (network eip155:8453 / Base, asset USDC).
Sign and retry per the x402 spec (https://x402.org). Settlement ~1s. No signup.

## Endpoints
- GET https://x402-data-api.sigrunner.workers.dev/crypto/prices?coins=bitcoin,ethereum,solana — $0.001 — spot token prices + change_24h (DefiLlama), keyless.
- GET https://x402-data-api.sigrunner.workers.dev/crypto/funding?limit=20 — $0.001 — cross-venue Hyperliquid+OKX+dYdX funding rates + arb spread (bps) + best long/short venue + premium/annualized/signal/next_funding_ts.
- GET https://x402-data-api.sigrunner.workers.dev/defi/yields?limit=20&project=&chain=&stable=&sort=tvl|risk_adjusted — $0.001 — top DeFi lending/LP yields, APY trend + IL risk + reward/underlying tokens + mu/sigma + stability forecast + TVL (DefiLlama).
- GET https://x402-data-api.sigrunner.workers.dev/pm/markets?query=&limit=20 — $0.005 — live Polymarket prediction markets, ranked by volume24hr (bestBid/bestAsk/spread, clobTokenIds, category tags, liquidity).
- GET https://x402-data-api.sigrunner.workers.dev/scan/mcp?url=<mcp-server> — $0.10 — security audit of an MCP server (tool-poisoning / prompt-injection, OWASP LLM01/LLM08); findings + risk score + verdict (clear/review/block).
- GET https://x402-data-api.sigrunner.workers.dev/enrich/tech-risk?domain=<domain> — $0.05 — tech-stack -> CVE (NVD) + EPSS + CISA-KEV risk + verdict (clear/review/block).
- GET https://x402-data-api.sigrunner.workers.dev/enrich/domain?domain=<domain> — $0.01 — firmographic + tech-stack enrichment, incl. subdomain enumeration (crt.sh) + verdict (clear/review/block, domain age).
- GET https://x402-data-api.sigrunner.workers.dev/chain/block-number — $0.001 — current Base mainnet block number.
- GET https://x402-data-api.sigrunner.workers.dev/chain/gas-price — $0.001 — current Base mainnet gas price (wei/gwei), EIP-1559 base_fee_gwei/priority_fee_gwei, gas_price_usd — no price oracle on ETH-only competitors.
- GET https://x402-data-api.sigrunner.workers.dev/chain/balance?address=<0x…> — $0.001 — ETH balance of a Base address, incl. balance_usd.
- GET https://x402-data-api.sigrunner.workers.dev/chain/token-balance?address=<0x…>&token=<0x…> — $0.001 — ERC-20 token balance of a Base address, incl. symbol/decimals/balance_formatted.
- GET https://x402-data-api.sigrunner.workers.dev/chain/tx?hash=<0x…> — $0.001 — transaction details by hash on Base.
- GET https://x402-data-api.sigrunner.workers.dev/chain/receipt?hash=<0x…> — $0.001 — transaction receipt by hash on Base: status, gas used, full logs, L1 fee breakdown (l1_fee_wei/l1_gas_price_wei/l1_gas_used/effective_gas_price_wei) + l1_fee_usd/total_fee_usd.
- GET https://x402-data-api.sigrunner.workers.dev/chain/code?address=<0x…> — $0.001 — contract-code check for a Base address (EIP-7702 delegated-EOA aware).
- GET https://x402-data-api.sigrunner.workers.dev/chain/wallet?address=<0x…> — $0.003 — wallet bundle: balance + balance_usd + tx count + contract check (EIP-7702 delegated-EOA aware), one call.
- GET https://x402-data-api.sigrunner.workers.dev/chain/token-security?token=<0x…> — $0.02 — token security / honeypot detector: EIP-1967/1822 proxy + upgradeability detection, bytecode scan for mint/pause/blacklist/fee-setter/ownership selectors, owner() renouncement check, live eth_call state-override transfer simulation — risk_score + verdict (clear/review/block) + flags. Real compute, not a thin data wrapper.

## Free (previews — taste the data before you pay)
- GET https://x402-data-api.sigrunner.workers.dev/crypto/prices/preview — free 1-token sample of /crypto/prices.
- GET https://x402-data-api.sigrunner.workers.dev/crypto/funding/preview — free top-1 sample of /crypto/funding.
- GET https://x402-data-api.sigrunner.workers.dev/defi/yields/preview — free top-1 sample of /defi/yields.
- GET https://x402-data-api.sigrunner.workers.dev/pm/markets/preview — free top-1 sample of /pm/markets.
- GET https://x402-data-api.sigrunner.workers.dev/chain/block-number/preview — free, full live data (identical to the paid route).
- GET https://x402-data-api.sigrunner.workers.dev/chain/gas-price/preview — free, full live data (identical to the paid route).
- GET https://x402-data-api.sigrunner.workers.dev/chain/token-security/preview — free, full real analysis of a fixed well-known token (Base WETH), same depth as the paid route.
- GET https://x402-data-api.sigrunner.workers.dev/scan/mcp/preview?url=<mcp-server> — free preview (counts + risk score; withholds detail).
- GET https://x402-data-api.sigrunner.workers.dev/.well-known/x402 — machine-readable discovery manifest.