Limitguard

{
  "name": "Limitguard",
  "description": "Limitguard checks companies and sales leads, crypto wallets and AI agent wallets. Limitguard is a lead validation service for lead generation agencies, B2B marketing and sales teams: it checks the company behind each lead against official business registers (full coverage in the Netherlands and Belgium), EU VAT and sanctions lists, with website age in the company check, and returns proceed, review or block with the source on every line. Developers and AI agents can use its HTTP API, MCP server and A2A service, hosted in the EU. Free sandbox key, no wallet. The sandbox covers entity, risk and KYB checks; Lead Verify and the agent check need a live key or an x402 payment. Paid by x402: Lead Verify $0.10 per lead and agent check $0.005 per wallet; entity check and KYB $0.29 and risk score $0.25 fresh, $0.11 cached ($0.25 KYB) when available; report $0.55; sanctions and wallet screens $0.005; other routes at the account price. API keys, the dashboard and the Claude connector pay the account prices: Lead Verify $0.27 per lead and agent check $0.75 per wallet; $0.11-1.85 per call; entity and risk checks $0.88-1.05 fresh ($1.50 KYB), $0.11 cached ($0.25 KYB) when available. Lead verification for NL and BE leads, plus entity, KYB and agent wallet checks for developers and AI agents.",
  "protocolVersion": "0.3.0",
  "version": "1.0",
  "url": "https://api.limitguard.ai/a2a",
  "preferredTransport": "JSONRPC",
  "provider": {
    "organization": "Limitguard",
    "url": "https://limitguard.ai"
  },
  "iconUrl": "https://limitguard.ai/icon-512.png",
  "documentationUrl": "https://docs.limitguard.ai/api-reference/leads/lead-verify",
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extensions": [
      {
        "uri": "https://github.com/google-agentic-commerce/a2a-x402/blob/main/spec/v0.2",
        "description": "Pay a priced skill per call by x402 (USDC on Base or Solana) inside A2A, with no API key: activate with the X-A2A-Extensions header, receive an input-required Task carrying x402.payment.required, then send the signed payload with the task id as x402.payment.payload.",
        "required": false
      },
      {
        "uri": "https://a2a-registry.org/extensions/registry/v1",
        "required": false,
        "params": {
          "payment": {
            "model": "freemium",
            "protocols": [
              "x402"
            ],
            "direction": "inbound",
            "rails": [
              {
                "network": "base",
                "token": "USDC",
                "type": "stablecoin",
                "protocol": "x402",
                "caip2": "eip155:8453",
                "contractAddress": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
              },
              {
                "network": "solana",
                "token": "USDC",
                "type": "stablecoin",
                "protocol": "x402",
                "caip2": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
                "contractAddress": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"
              }
            ]
          }
        }
      }
    ]
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "securitySchemes": {
    "apiKey": {
      "type": "apiKey",
      "in": "header",
      "name": "X-API-Key",
      "description": "Limitguard key (lg_live_...); free via POST /v1/keys/create"
    },
    "bearer": {
      "type": "http",
      "scheme": "bearer",
      "description": "The same key as Authorization: Bearer lg_live_..."
    }
  },
  "security": [
    {
      "apiKey": []
    },
    {
      "bearer": []
    }
  ],
  "skills": [
    {
      "id": "lead_verify",
      "name": "lead_verify",
      "tags": [
        "lead_verification",
        "company_registry",
        "sales"
      ],
      "description": "Lead verify for one NL or BE sales lead: is it a real, active company? Checks the KVK or KBO register and cross-checks what the lead holds: VAT with VIES, mail server and disposable domain, IBAN country and bank (not the holder), and the company name against the OFAC, EU and UN sanctions lists. Returns a verdict, a 0-100 lead score and flags, each with one action. An input not given is not checked.",
      "endpoint": "/v1/leads/verify",
      "method": "POST",
      "price_usdc": 0.1,
      "account_price_usdc": 0.27
    },
    {
      "id": "agent_check",
      "name": "agent_check",
      "tags": [
        "wallet_screening",
        "sanctions",
        "agent_identity"
      ],
      "description": "Agent wallet check in one call: screens an EVM wallet against the OFAC SDN digital-currency address list, reads its Base USDC and ETH balance, looks up its ERC-8004 identity registration (and, given an agent id, that agent's owner and payment wallet) and lists open ERC-8004 feedback, which is not scored. Returns one verdict and each part's status; a part that could not be read says so.",
      "endpoint": "/v1/agent/check",
      "method": "POST",
      "price_usdc": 0.005,
      "account_price_usdc": 0.75
    },
    {
      "id": "light_check",
      "name": "light_check",
      "tags": [
        "entity_verification",
        "company_registry",
        "sanctions"
      ],
      "description": "Light company check for an agent: is the company on the NL (KVK) or BE (KBO) register and active, is its EU VAT number valid (VIES), and does its name match the OFAC, EU or UN sanctions lists? Each part says ok, not covered or unavailable. No owners, PEP or address match.",
      "endpoint": "/v1/entity/light-check",
      "method": "POST",
      "price_usdc": 0.05,
      "account_price_usdc": 0.11
    },
    {
      "id": "seller_preflight",
      "name": "seller_preflight",
      "tags": [
        "wallet_screening",
        "sanctions",
        "x402"
      ],
      "description": "Preflight before an agent pays an x402 seller: screens the payTo wallet against the OFAC SDN address list, reads who registered the resource domain and when (RDAP), and screens that company against the OFAC, EU and UN lists. Compares the payTo with the wallet the seller publishes in its 402 and /.well-known/x402, and blocks a lookalike (address poisoning). Returns ok, caution or block with one reason per finding.",
      "endpoint": "/v1/seller/preflight",
      "method": "POST",
      "price_usdc": 0.005,
      "account_price_usdc": 0.11
    },
    {
      "id": "entity_check",
      "name": "entity_check",
      "tags": [
        "entity_verification",
        "risk_scoring",
        "reputation_tracking",
        "wallet_verification",
        "sanctions",
        "kyb"
      ],
      "description": "Company check: sanctions and country risk on every call; the KVK or KBO register, VAT, domain and IBAN checks depending on the identifiers supplied. Returns a 0-100 score, a cluster and a recommendation.",
      "endpoint": "/v1/entity/check",
      "method": "POST",
      "price_usdc": 0.29,
      "account_price_usdc": 1.05
    },
    {
      "id": "risk_score",
      "name": "risk_score",
      "tags": [
        "risk_scoring"
      ],
      "description": "Quick risk score assessment. Faster than full entity check.",
      "endpoint": "/v1/risk/score",
      "method": "POST",
      "price_usdc": 0.25,
      "account_price_usdc": 0.9
    },
    {
      "id": "kyb_check",
      "name": "kyb_check",
      "tags": [
        "kyb_verification",
        "sanctions",
        "compliance_monitoring"
      ],
      "description": "Know Your Business verification with sanctions check and company registration.",
      "endpoint": "/v1/kyb/check",
      "method": "POST",
      "price_usdc": 0.29,
      "account_price_usdc": 1.5
    },
    {
      "id": "verify_wallet",
      "name": "verify_wallet",
      "tags": [
        "wallet_screening",
        "sanctions"
      ],
      "description": "Screen a wallet: OFAC SDN address match, on-chain signals (contract check, native and USDC balance, transaction count, first seen on Base) and named risk rules with up to 3 advice items. On Base, also reports any ERC-8004 agent the wallet owns and its open on-chain reputation as descriptive signals, never scored. Supports EVM and Solana addresses.",
      "endpoint": "/v1/mcp/verify-wallet",
      "method": "POST",
      "price_usdc": 0.005,
      "account_price_usdc": 0.11
    },
    {
      "id": "wallet_sanctions",
      "name": "wallet_sanctions",
      "tags": [
        "wallet_screening",
        "sanctions",
        "free"
      ],
      "description": "Free yes/no check of a wallet address against the OFAC SDN digital-currency address list, held locally and refreshed daily: sanctioned, lists, the list date and its freshness, no programmes or entry ids. 10 per caller per UTC day, separate from the name preview, 50 per client IP across API keys. The full wallet screen is POST /v1/mcp/verify-wallet ($0.005 by x402, $0.11 with an API key).",
      "endpoint": "/v1/sanctions/wallet",
      "method": "POST",
      "price_usdc": 0.0,
      "account_price_usdc": 0.0
    }
  ],
  "authentication": {
    "schemes": [
      "x402",
      "api_key"
    ],
    "x402": {
      "protocol": "x402-v2",
      "chains": [
        "eip155:8453",
        "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
      ],
      "currency": "USDC"
    },
    "api_key": {
      "header": "X-API-Key",
      "prefix": "lg_live_"
    }
  },
  "sandbox": {
    "url": "https://api.limitguard.ai/v1/keys/create",
    "curl": "curl -s -X POST https://api.limitguard.ai/v1/keys/create -H 'Content-Type: application/json' -d '{\"email\": \"you@example.com\", \"tier\": \"sandbox\"}'",
    "note": "Free sandbox key, no wallet. POST here with tier=sandbox to get an lg_sandbox_ key; send it as X-API-Key for free mock data on the entity, risk, KYB, reputation and sanctions routes (10 req/min). The sandbox covers entity, risk and KYB checks; Lead Verify and the agent check need a live key or an x402 payment. Or screen a name against the OFAC, EU and UN sanctions lists free first: POST https://api.limitguard.ai/v1/sanctions/preview, or a wallet address against the OFAC SDN list: POST https://api.limitguard.ai/v1/sanctions/wallet."
  },
  "supportedInterfaces": [
    {
      "url": "https://api.limitguard.ai/a2a",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "1.0"
    },
    {
      "url": "https://api.limitguard.ai/a2a",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "0.3"
    }
  ]
}