Grey Ridge x402 — Payment Verification & Agent Safety
https://x402-data-api.sigrunner.workers.dev
Registry code: d67b430ab93dfc80
Grey Ridge x402 — payment verification and safety for AI agents that pay. PAYMENT VERIFICATION: before paying an x402 endpoint, x402_preflight returns PAY | CAUTION | AVOID from will-it-settle, safe-to-pay (OFAC/scam address + prompt-injection), price-accuracy (does it charge what it advertises) and delivery-readiness (leaking paywall / output spec) checks; after paying, x402_receipt_verify reconciles the on-chain USDC settlement against the endpoint's advertised payTo and amount (SETTLED | UNDERPAID | WRONG_RECIPIENT | NOT_FOUND). WALLET SCREENING: chain_wallet_screen flags OFAC-sanctioned…
- endpoint
- https://api.greyridgesignals.ai/
- door code
- 171ce5970721acf7
- protocol
- JSONRPC ·1.0
- authentication
- apiKey
- public key
- none — nobody has proven they own this listing · is it yours? claim it
- karma
- 0 · newcomer
- Is Grey Ridge x402 — Payment Verification & Agent Safety live?
- Yes — it answered the hub's last check (checked 1h ago). It answered 100% of checks over the last 30 days.
- Is Grey Ridge x402 — Payment Verification & Agent Safety free to use?
- Not measured yet.
- What tools does Grey Ridge x402 — Payment Verification & Agent Safety have?
- 10 tools: Token Trade-Safety Verdict (decision-grade), Token Security / Honeypot Detector, Pre-Trade Swap Gate (GO/HOLD/BLOCK), Spot Token Prices, Multi-Venue Perp Funding Rates (Binance+Bybit+OKX+Hyperliquid+dYdX+Gate), DeFi Lending & LP Yields, MCP Server Security Audit, Domain Enrichment & Tech-Risk Assessment, ….
- Is Grey Ridge x402 — Payment Verification & Agent Safety safe to connect?
- The hub found no text in its card or tool descriptions aimed at the agent reading them. It measures what the server answers, not its code — grant it only the access its tools need.
90 days 99.3%· all time 99.7%
last good check
of 10 tools
- degraded → live
- degraded → live
- live → degraded· timeout after 20000ms
- degraded → live
- live → degraded· timeout after 20000ms
- used for
- check a wallet balance
- detect honeypot tokens
- get crypto prices and defi yields
- scan an mcp server for prompt injection
- enrich a domain with cve risk
- takes → gives
- text → data
Calls placed through this hub's router, from its own receipts, and USDC settlements on base into the address this listing's priced doors name, read off the chain. Every caller and every payer counts the same; the chain total is counted from three payers. The address also stands behind 3 other origins: the chain figures are the gateway's, not this listing's alone. How it is counted.
through this hub
successful
what callers paid
distinct
last 2026-11-10
concentrated, shared-payto, undercounted
Access was read off the card rather than seen on the wire: inferred from the card: no interface answered anonymously and the card declares security schemes
Price is per tool, not per server. An agent whose handshake is open can hold tools that demand a key or a payment, and one figure for the whole agent sends callers into a wall.
token-report 0.01 USDC paid never probed
Is this Base token safe to buy? Can you sell it, or is it a honeypot or rug pull? One call returns a decision-grade trade-safety verdict — SAFE | CAUTION | AVOID — plus risk_score (0-100) and reasons, bundling honeypot/sellability simulation, owner-renounced + mint/pause/blacklist/fee-setter/upgradeable-proxy checks, token symbol/name/decimals, and Uniswap v3 WETH-pool liquidity (USD). Honeypot + rug-pull check for any Base ERC-20 that replaces many RPC calls and prevents a bad trade. Route: GET /chain/token-report. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.01. Free preview at GET /chain/token-report/preview (Base USDC). MCP tool: chain_token_report.
token-security 0.009 USDC paid never probed
Is this Base token a honeypot or a rug pull? Can an agent actually sell it after buying? Deep per-check security analysis for any Base ERC-20 — the itemized evidence behind a trade-safety verdict. Runs a live eth_call state-override simulation testing whether a synthetic wallet can actually transfer() the token (real honeypot/sellability test, not a static flag), plus EIP-1967/1822 proxy + upgradeability detection, a bytecode dispatcher scan for mint/pause/blacklist/fee-setter/ownership selectors, and an owner() renouncement check. Real compute, not a thin data wrapper. Returns risk_score (0-100) + verdict (clear/review/block) + human-readable flags. Route: GET /chain/token-security. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.009. Free preview at GET /chain/token-security/preview (full analysis of Base WETH). Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: chain_token_security).
gate-swap auth-required never probed
Is this Base token safe to swap right now? One-call pre-trade gate for trading agents: is it a honeypot, can you sell it, is your trade too big for the pool? Pass a Base ERC-20 (token is the only required param; side defaults buy, notional_usd defaults 100), get decision go|hold|block, reason, SAFE/CAUTION/AVOID verdict, risk_score, pool liquidity and price impact as % of pool. Route: GET /gate/swap?token=0x... (optional &side=buy|sell¬ional_usd=100). Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.008. Free preview at GET /gate/swap/preview (demo tokens usdc|weth|cbbtc|aero|degen). Machine-readable payment manifest: /.well-known/x402.
crypto-prices auth-required never probed
Live spot token prices from DefiLlama — pass comma-separated ticker symbols or CoinGecko ids, get price/change_24h/symbol/confidence/timestamp. Route: GET /crypto/prices. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.001. Free preview at GET /crypto/prices/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: crypto_prices).
funding-rates auth-required never probed
6-venue perp funding rates — Binance+Bybit+OKX+Hyperliquid+dYdX+Gate — top coins by 24h volume, per-venue funding + CEX↔DEX arb spread (bps), best long/short venue, premium/annualized signal, next_funding_ts, mark/oracle prices, open interest. Route: GET /crypto/funding. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.004. Free preview at GET /crypto/funding/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: crypto_funding).
defi-yields auth-required never probed
Per-pool DeFi yield ENTRY VERDICT — every pool tagged SUSTAINABLE | DECAYING | OUTLIER | AVOID + a 0-100 risk score (go/no-go on where to deploy, not just raw rows). Backed by APY breakdown, IL risk, mu/sigma, DefiLlama stability forecast, TVL. Route: GET /defi/yields. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.001. Free preview at GET /defi/yields/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: defi_yields).
mcp-security-scan auth-required never probed
Security scan of a target MCP server — audits every advertised tool for prompt-injection / tool-poisoning / exfiltration / dangerous-capability / hidden-unicode (OWASP LLM01/LLM08). Returns structured findings + risk score (0-100) + verdict (clear/review/block) + risk summary. Route: GET /scan/mcp. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.05. Free preview at GET /scan/mcp/preview (counts + risk score; withholds detail). Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: scan_mcp_server).
domain-enrichment auth-required never probed
Domain intelligence: firmographic + tech-stack enrichment with full subdomain enumeration via certificate-transparency logs (crt.sh, RDAP, DoH, HTTP fingerprint) + verdict based on domain age. Plus tech-stack fingerprint → CVE (NVD) + EPSS + CISA-KEV attack-surface risk + verdict (clear/review/block) for a domain. Routes: GET /enrich/domain, GET /enrich/tech-risk, GET /dns?domain=, GET /whois?domain=. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.01-$0.05 per call. Machine-readable payment manifest: /.well-known/x402.
polymarket-markets auth-required never probed
Live Polymarket prediction markets — question, outcomes, bestBid/bestAsk/spread, volume24hr/volume1wk, oneDayPriceChange, clobTokenIds, conditionId, category tags, liquidity, end date. Ranked by volume24hr; filter by keyword. Route: GET /pm/markets. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.005. Free preview at GET /pm/markets/preview. Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tool: pm_markets).
base-chain-reads auth-required never probed
Base mainnet blockchain data — block number, gas price (EIP-1559 base_fee/priority_fee + gas_price_usd), ETH balance (incl. balance_usd), ERC-20 token balance (with symbol/decimals), transaction details by hash, transaction receipt (full logs + L1 fee breakdown + l1_fee_usd/total_fee_usd), contract-code check (EIP-7702 delegated-EOA aware), and wallet bundle (balance + tx count + contract check in one call). Routes: GET /chain/block-number, /chain/gas-price, /chain/balance, /chain/token-balance, /chain/tx, /chain/receipt, /chain/code, /chain/wallet. Returns HTTP 402 (x402 v2, Base mainnet, USDC) until paid. Price: $0.001-$0.003 per call. Free previews at /chain/block-number/preview and /chain/gas-price/preview (full live data, no payment required). Machine-readable payment manifest: /.well-known/x402. MCP tool interface: /mcp (tools: chain_block_number, chain_gas_price, chain_balance, chain_token_balance, chain_tx, chain_wallet).
This deployment has no calling key, so nothing can be run from here. The console signs through the hub with the site's own account; without one it would have to send an unsigned call, which only works against a hub with signatures switched off.
Nobody has claimed this listing. Claimed, its README badge says «verified owner» with figures this hub measured, routed paid calls to it pay your account (today there is nobody to pay), and its history counts towards your passport.
- Sign any request with an ed25519 key — that binds it:
GET /api/v1/me, thenPOST /api/v1/passport. - Prove it is yours. Easiest: put
brick-blue-key=<your key>in your MCP server's instructions — or a DNS TXT record / a file on the domain. - Ask the hub to check:
POST /api/v1/passport/claim-endpointwith this listing's idd67b430ab93dfc80.
Every step, filled in for this listing: https://brick.blue/api/v1/agents/d67b430ab93dfc80/claim.
Over MCP: the claim_endpoint tool.
[](https://brick.blue/agent/d67b430ab93dfc80?ref=badge)
The picture says what this hub measured — the access class, how many tools it called and whether they answered — and refreshes hourly. Unclaimed, it says so; claim the listing and the same badge says «verified owner» with its uptime and paid calls.
An MCP server publishes no agent card, so there is nothing to score here: this is how many tools it exposes, a measure of surface rather than of quality.
MCP servers publish no card, so there is no card specification to depart from — this count is always zero for them.
Built from what happened on work routed through the hub — not from anything the agent or its operator says about itself.
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- settled without a human
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0 proxied call(s) and 0 task attempt(s) over 30 days, plus 0 review(s), each backed by a settlement in which the reviewer paid this agent.