api.limitguard.ai

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment Required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "decimals": 6
      },
      "payTo": "0x6454a645C92B8722EC9A07FCe12A582A877B8843",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.limitguard.ai/v1/agent/check",
      "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.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 600
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "name": "USDC",
        "version": "2",
        "decimals": 6,
        "feePayer": "2jMbAFjK2joDBaecvvNDBKU1BTyj3FuvV1ZTmvTkKQu8"
      },
      "payTo": "P9Mqh3W5sR5CqJAWYJFQePVaUs5GBfnonsaCdT7FbEQ",
      "amount": "5000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "mimeType": "application/json",
      "resource": "https://api.limitguard.ai/v1/agent/check",
      "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.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 600
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "proof": "transactionHash",
        "header": "X-PAYMENT",
        "decimals": 6,
        "challengeId": "lY0ZFbwLTuhSqQSnUxcN96fvuA1UVXvI",
        "paymentFlow": "upfront",
        "instructions": "Already sent the USDC? Transfer at least 5000 units to payTo on this network, then retry with '0x<64-hex transaction hash>' as your PAYMENT-SIGNATURE (x402 v2) or X-PAYMENT (v1) header AND the X-Payment-Challenge header from the payment-required response you were quoted this resource with (extra.challengeId there). The receipt is read on chain; the transfer must be within the last 150 blocks, each hash pays once, and only the caller that received that challenge can redeem it. Optionally also send X-Payment-Challenge-Signature: the sending wallet's signature over the challenge message (layout on the x402 protocol page). It is optional today and will become required; signing makes your hash unredeemable by anyone else. A redemption sent right after mining can be refused with errorCode settlement_not_yet_visible while our node catches up; the hash is not consumed, so wait for Retry-After and send the same request again.",
        "challengeHeader": "X-Payment-Challenge",
        "challengeSignatureHeader": "X-Payment-Challenge-Signature"
      },
      "payTo": "0x6454a645C92B8722EC9A07FCe12A582A877B8843",
      "amount": "5000",
      "scheme": "settled-transfer",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.limitguard.ai/v1/agent/check",
      "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.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.limitguard.ai/v1/agent/check",
    "tags": [
      "kyb",
      "sanctions",
      "lead-verification",
      "wallet-screening",
      "compliance"
    ],
    "iconUrl": "https://limitguard.ai/icon-512.png",
    "mimeType": "application/json",
    "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.",
    "serviceName": "Limitguard"
  },
  "errorCode": "payment_required",
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "wallet": "0x7e4c2a91d05b3f68a1c9e2d4b7f05a3c6e81d290"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "ran": [
              "sanctions",
              "balance",
              "identity",
              "reputation",
              "wallet_risk"
            ],
            "domain": {
              "domain": null,
              "has_mx": null,
              "probes": null,
              "reason": null,
              "status": "not_requested",
              "has_spf": null,
              "has_dmarc": null,
              "ssl_valid": null,
              "web_score": null,
              "ssl_issuer": null,
              "domain_age_days": null,
              "domain_expires_at": null
            },
            "wallet": "0x7e4c2a91d05b3f68a1c9e2d4b7f05a3c6e81d290",
            "balance": {
              "reason": null,
              "status": "ok",
              "chain_id": "eip155:8453",
              "balance_usdc": 412.5,
              "balance_native": 0.0031
            },
            "verdict": "no_findings",
            "chain_id": "eip155:8453",
            "identity": {
              "reason": null,
              "status": "ok",
              "agent_id": "1187",
              "registry": "erc8004",
              "agent_owner": "0x7e4c2a91d05b3f68a1c9e2d4b7f05a3c6e81d290",
              "agent_wallet": "0x7e4c2a91d05b3f68a1c9e2d4b7f05a3c6e81d290",
              "agent_registered": true,
              "wallet_agent_ids": [
                "1187"
              ],
              "wallet_controls_agent": true
            },
            "sanctions": {
              "hit": false,
              "lists": [],
              "reason": null,
              "status": "ok",
              "programs": [],
              "list_as_of": "09/30/2026",
              "list_status": "ok"
            },
            "checked_at": "2026-10-01T10:00:00Z",
            "reputation": {
              "note": "open on-chain feedback, not used in the score",
              "agents": [
                {
                  "agent_id": "1187",
                  "top_tags": [
                    {
                      "avg": 4.67,
                      "tag": "starred",
                      "count": 3
                    }
                  ],
                  "clients_capped": false,
                  "feedback_count": 3,
                  "distinct_clients": 2
                }
              ],
              "reason": null,
              "status": "ok"
            },
            "did_not_run": [],
            "wallet_risk": {
              "reason": null,
              "status": "ok",
              "risk_level": "low",
              "risk_score": 10,
              "rules_fired": []
            },
            "schema_version": "agent-check-v1",
            "verdict_reasons": []
          }
        },
        "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). Or sign up for 5 free lead checks (once per verified company, used within 30 days; a full report is paid): https://dashboard.limitguard.ai/sign-up?utm_source=api&utm_medium=agent&utm_campaign=signup&utm_content=x402_hint. 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."
        },
        "recovery": {
          "url": "https://api.limitguard.ai/v1/quickstart",
          "curl": "curl -s https://api.limitguard.ai/v1/quickstart"
        },
        "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.",
        "documentation_url": "https://docs.limitguard.ai/x402-protocol?utm_source=api&utm_medium=agent&utm_campaign=docs&utm_content=x402_protocol"
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "note": {
            "type": "string"
          },
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "wallet"
                ],
                "properties": {
                  "domain": {
                    "type": "string",
                    "description": "Optional website domain the agent gives for itself; reported, never read by the verdict"
                  },
                  "wallet": {
                    "type": "string",
                    "description": "EVM wallet address (0x + 40 hex characters), read on Base"
                  },
                  "agent_id": {
                    "type": "string",
                    "description": "Optional ERC-8004 agentId (decimal) the wallet claims"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "headers": {
                "type": "object",
                "additionalProperties": {
                  "type": "string"
                }
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          },
          "sandbox": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "curl": {
                "type": "string"
              },
              "note": {
                "type": "string"
              }
            }
          },
          "recovery": {
            "type": "object",
            "required": [
              "url"
            ],
            "properties": {
              "url": {
                "type": "string"
              },
              "curl": {
                "type": "string"
              }
            }
          },
          "prepaidBalance": {
            "type": "object",
            "required": [
              "balance_usd",
              "price_usd"
            ],
            "properties": {
              "note": {
                "type": "string"
              },
              "topup": {
                "type": "object",
                "required": [
                  "url"
                ],
                "properties": {
                  "url": {
                    "type": "string"
                  },
                  "curl": {
                    "type": "string"
                  },
                  "minimum_usd": {
                    "type": "integer"
                  }
                }
              },
              "reason": {
                "type": "string"
              },
              "price_usd": {
                "type": "number"
              },
              "balance_usd": {
                "type": [
                  "number",
                  "null"
                ]
              }
            }
          },
          "documentation_url": {
            "type": "string"
          },
          "cachedTierAvailable": {
            "type": "boolean"
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "decimals": 6
    },
    "payTo": "0x6454a645C92B8722EC9A07FCe12A582A877B8843",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.limitguard.ai/v1/agent/check",
    "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 …",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 600
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "name": "USDC",
      "version": "2",
      "decimals": 6,
      "feePayer": "2jMbAFjK2joDBaecvvNDBKU1BTyj3FuvV1ZTmvTkKQu8"
    },
    "payTo": "P9Mqh3W5sR5CqJAWYJFQePVaUs5GBfnonsaCdT7FbEQ",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.limitguard.ai/v1/agent/check",
    "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 …",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 600
  }
]

Provenance

Seen in the source catalog

2026-10-14 08:34Z

Last indexed by Roundhouse

2026-10-25 19:46Z

Last enriched (probe, favicon, geo)

2026-10-19 14:45Z

x402 version

1

Max timeout

600s

Liveness probe

HTTP 402