Grey Ridge Signals — Base-native x402 Data API

Agent-native, pay-per-call data on Base — no account, no API key.

Every endpoint here is paid inline in USDC over the x402 protocol on Base mainnet — an agent gets a 402 challenge, signs, retries, and gets data back in the same request. No signup, no key management, no subscription. Our white space is Base-native RPC (block/gas/balance/tx/wallet reads with EIP-7702 delegated-EOA detection) — most data sellers in this space are Ethereum-only. We pair that with crypto/DeFi/prediction-market data and MCP security audits (tool-poisoning / prompt-injection scanning), all reachable over plain HTTP or as MCP tools.

Endpoint groups

GroupPriceEndpoints
Base on-chain reads$0.001–$0.003/chain/block-number, /chain/gas-price, /chain/balance, /chain/token-balance, /chain/tx, /chain/receipt, /chain/code, /chain/wallet
Crypto / DeFi / prediction markets$0.001–$0.005/crypto/prices ($0.004), /crypto/funding ($0.004), /defi/yields, /pm/markets
Security$0.01–$0.10/enrich/domain, /enrich/tech-risk, /scan/mcp, /chain/token-security

Try it free

curl -s https://x402-data-api.sigrunner.workers.dev/chain/gas-price/preview

Add the MCP server

{
  "mcpServers": {
    "grey-ridge-x402": {
      "type": "streamable-http",
      "url": "https://x402-data-api.sigrunner.workers.dev/mcp"
    }
  }
}

Discovery