All servers · Agent payments (x402) · Crypto & blockchain · Payments & accounting

NullClear Arbiter

io.github.mithgalalfayez/nullclear · v1.1.1

Tools changed (7 days)

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2024-11-05
Rank score	—
Declared risk	Can write (some tools are not declared read-only)
Capabilities declared	prompts, resources, tools
Tool definitions	8 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Description written by the publisher, not verified

Autonomous x402 payment schema-escrow arbiter, spend firewall, failover & ERC-8004 Sybil oracle

Connect

streamable-http · https://api.nullclear.dev/mcp

claude mcp add --transport http nullclear https://api.nullclear.dev/mcp

{
  "mcpServers": {
    "nullclear": {
      "url": "https://api.nullclear.dev/mcp"
    }
  }
}

Tools as reported by the server

nullclear_discover_verified_x402_apis
Search the live NullClear Ecosystem Directory for audited, high-uptime x402 & ERC-8004 APIs by topic/keyword, category, minimum uptime, or max latency. Automatically returns the NullClear-protected Zero-Loss Proxy URL ('https://api.nullclear.dev/https://...') for each endpoint.
nullclear_token_security_audit
Audit any Base ERC-20 token address for honeypot risk, buy/sell taxes, verified bytecode, and x402 compatibility via NullClear Bazaar. Works out-of-the-box with zero configuration (10 free daily calls included).
nullclear_wallet_risk_score
Check any wallet or agent address on Base for OFAC sanctions, Sybil wash-trading concentration flags, and ERC-8004 counterparty reputation. Works out-of-the-box with zero configuration (10 free daily calls included).
nullclear_crypto_market_oracle
Fetch multi-exchange spread-verified crypto spot prices (ETH/USDC, BTC/USDC, SOL/USDC, BASE/USDC) with cryptographic NullClear invariant receipts. Works out-of-the-box with zero configuration (10 free daily calls included).
nullclear_safe_fetch
Zero-config drop-in URL fetcher with automatic Canonical LLM Refusal Guard, HTTP 5xx crash guard, empty-JSON guard, and cryptographic execution receipt. Protects agents from hallucinated or broken API responses.
nullclear_escrow_x402_call
Execute an x402-gated HTTP API call through NullClear deferred schema escrow. Guarantees payment is only settled if upstream returns valid data matching your schema contract. Supports 10 free daily trial calls with zero wallet setup.
nullclear_check_reputation
Inspect an AI agent's trust score (0-100), clearing reliability, Sybil wash-trade penalty flags, and corporate KYA backing on Base
nullclear_verify_kya_mandate
Verify an agent's Know Your Agent (KYA) corporate liability mandate, active validity, and whether a proposed transaction amount is within corporate limits

Tool changes

2026-10-18: nullclear_discover_verified_x402_apis, nullclear_token_security_audit, nullclear_wallet_risk_score, nullclear_crypto_market_oracle, nullclear_safe_fetch, nullclear_escrow_x402_call, nullclear_check_reputation, nullclear_verify_kya_mandate
2026-10-17: nullclear_check_reputation, nullclear_escrow_x402_call, nullclear_verify_kya_mandate
2026-10-16: nullclear_check_reputation, nullclear_escrow_x402_call, nullclear_verify_kya_mandate

Repository · Website · JSON · Text for agents · Registry updated 2026-10-16