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NullClear Arbiter

R0· no sign-in

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

v1.1.1 · active · repository · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality89new
Trust93of 100
Uptime, 30 days100%
Latency p50370 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "nullclear": {
      "type": "http",
      "url": "https://api.nullclear.dev/mcp"
    }
  }
}
claude mcp add --transport http nullclear https://api.nullclear.dev/mcp
[mcp_servers.nullclear]
url = "https://api.nullclear.dev/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "nullclear": {
      "type": "remote",
      "url": "https://api.nullclear.dev/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "nullclear": {
      "type": "http",
      "url": "https://api.nullclear.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=nullclear&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vYXBpLm51bGxjbGVhci5kZXYvbWNwIn0%3D"
}
{
  "servers": {
    "nullclear": {
      "type": "http",
      "url": "https://api.nullclear.dev/mcp"
    }
  }
}
{
  "mcpServers": {
    "nullclear": {
      "httpUrl": "https://api.nullclear.dev/mcp"
    }
  }
}
extensions:
  "nullclear":
    enabled: true
    name: "nullclear"
    type: streamable_http
    uri: "https://api.nullclear.dev/mcp"
    timeout: 300

Quality 89 / 100new

protocol75 · weight 25
  • warn
    protocol.modernnewest supported version is 2024-11-05; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
  • n/a
    protocol.statelessonly applies to 2026-07-28 servers
  • pass
    protocol.transportstreamable HTTP
  • n/a
    protocol.list_ttlonly applies to 2026-07-28 servers
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene100 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations8 of 8 tools declare readOnlyHint or destructiveHint
  • pass
    tools.directory_hintsevery tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
  • pass
    tools.token_costabout 1,721 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stabilityn/a · weight 15
  • n/a
    stability.changes, stability.rug_pulltool history recorded for 4 of the 7 days needed
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvabledeps.dev does not know @nullclear/[email protected]

8 tools, about 1,721 tokens to load them all · tool set 2ceae473fc65 · tools last changed 2026-10-18 · checked 2026-10-20 11:08 UTC

Tool changes

  • nullclear_escrow_x402_callchangeddescription
    before

    Execute an x402-gated HTTP API call through NullClear deferred schema escrow. The arbiter guarantees payment is only settled if upstream returns valid data matching your schema contract. If the seller hallucinates or crashes, $0 is spent.

    after · 58% of words in common

    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_safe_fetchadded

    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_crypto_market_oracleadded

    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_wallet_risk_scoreadded

    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_token_security_auditadded

    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_discover_verified_x402_apisadded

    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_verify_kya_mandatechangedannotations
  • nullclear_escrow_x402_callchangedinput schema, annotations
  • nullclear_check_reputationchangedinput schema, annotations

Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 93 / 100

provenance75
liveness100
freshness100
hygiene100

+repository +website +reachable +uptime-100% +updated-4d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@nullclear/[email protected] npmthis version is not known to the dependency resolver

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://api.nullclear.dev/mcp streamable-httpnoneyes100%370 ms2024-11-052026-10-20
packageregistryversionruntimesecrets
@nullclear/mcpnpm1.1.1–

Tools (8)

nullclear_check_reputationread-onlyInspect an AI agent's trust score (0-100), clearing reliability, Sybil wash-trade penalty flags, and corporate KYA backing on Base
nullclear_crypto_market_oracleread-onlyFetch 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_discover_verified_x402_apisread-onlySearch 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_escrow_x402_callExecute 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_safe_fetchread-onlyZero-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_token_security_auditread-onlyAudit 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_verify_kya_mandateread-onlyVerify an agent's Know Your Agent (KYA) corporate liability mandate, active validity, and whether a proposed transaction amount is within corporate limits
nullclear_wallet_risk_scoreread-onlyCheck 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).

Schemas: list_tools.

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Official server.json
{
  "name": "io.github.mithgalalfayez/nullclear",
  "title": "NullClear Arbiter",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://api.nullclear.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.1.1",
  "packages": [
    {
      "version": "1.1.1",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@nullclear/mcp",
      "registryType": "npm"
    }
  ],
  "repository": {
    "url": "https://github.com/Nullclear-Protocol/nullclear",
    "source": "github",
    "subfolder": "packages/mcp-server"
  },
  "websiteUrl": "https://nullclear.dev",
  "description": "Autonomous x402 payment schema-escrow arbiter, spend firewall, failover & ERC-8004 Sybil oracle"
}