TrustAgent

Live 402 challenge

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

{
  "error": "X-PAYMENT header is required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x6121654D3Fd4C8B42a90d30472E4D40927C3e6BB",
      "trial": {
        "note": "3 free calls of THIS endpoint per wallet per 24h — not a lesser one. Sign `message` below with any wallet, substituting your own address on the wallet line (either casing), and send the two headers in `send`. No funds, no signup, no settlement — a signature proves the wallet is yours and costs nothing. Contract wallets are verified via ERC-1271. Prefer one signature total: POST the same wallet and signature to /v1/trial/claim and send the returned token as `X-Trial-Token` instead.",
        "send": {
          "X-Trial-Wallet": "the wallet that signed, 0x-prefixed",
          "X-Trial-Signature": "the 0x-prefixed signature over `message`"
        },
        "claim": {
          "use": "X-Trial-Token: the token it returns",
          "body": {
            "wallet": "the wallet that signed, 0x-prefixed",
            "signature": "the 0x-prefixed signature over `message`"
          },
          "endpoint": "POST /v1/trial/claim"
        },
        "howTo": "https://trust-agent.io/v1/trial",
        "price": "$0.00",
        "message": "TrustAgent Free Trial v1\nwallet: 0xYourWalletAddress\ngrant: free-tier access to paid TrustAgent endpoints",
        "signWith": "personal_sign (EIP-191)",
        "windowHours": 24,
        "callsPerWallet": 3
      },
      "scheme": "exact",
      "network": "base",
      "mimeType": "application/json",
      "resource": "https://trust-agent.io/v1/endpoint/screen",
      "description": "Is this x402 endpoint safe to pay? Reads the endpoint's own payment challenge under BOTH protocol versions — v1 body and v2 PAYMENT-REQUIRED header, so a live v2-only service is not reported as dead — extracts the payout wallet it advertises, and screens that wallet: OFAC sanctions, sybil-filtered ERC-8004 reputation, on-chain behaviour. Flags an endpoint that names different recipients under the two versions. Scores the wallet, not the service behind it, and says so.",
      "inputSchema": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "url": "REQUIRED. The x402 endpoint to screen, e.g. https://example.com/v1/thing.",
          "chain": "OPTIONAL. Only \"base\" is served; any other value is refused rather than answered from the wrong chain."
        }
      },
      "discoverable": true,
      "outputSchema": {
        "flags": "array of {code, severity, title, detail}",
        "offers": "every advertised offer: payTo, network, asset, amount, version",
        "paywalled": "whether the endpoint answered 402 with a parseable payment offer",
        "components": "per-rule scoring breakdown",
        "trustScore": "0-100 for the payout wallet; null when no rule could be evaluated",
        "payoutWallet": "the address scored",
        "x402Versions": "which protocol generations answered — [1], [2] or [1,2]",
        "recommendation": "proceed | proceed_with_caution | hold | block | insufficient_data",
        "additionalPayoutWallets": "present only when the offers disagree about the recipient"
      },
      "freeAlternative": {
        "url": "https://trust-agent.io/v1/endpoint?url=https://...",
        "note": "No payment required. Resolves the endpoint to the wallet it actually pays and screens that wallet — enough on its own to refuse a sanctioned recipient. This paid route adds the numeric score, the itemised flags and the reasoning behind them.",
        "price": "$0.00",
        "returns": "the advertised payout wallet, OFAC verdict, risk band and flag counts",
        "endpoint": "GET /v1/endpoint"
      },
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 60
    }
  ],
  "x402Version": 1
}

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"
    },
    "payTo": "0x6121654D3Fd4C8B42a90d30472E4D40927C3e6BB",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "url": "https://trust-agent.io/v1/verify/quick",
          "chain": "base"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "flags": "array of {code, severity, title, detail}",
          "offers": "every advertised offer: payTo, network, asset, amount, version",
          "paywalled": "whether the endpoint answered 402 with a parseable payment offer",
          "components": "per-rule scoring breakdown",
          "trustScore": "0-100 for the payout wallet; null when no rule could be evaluated",
          "payoutWallet": "the address scored",
          "x402Versions": "which protocol generations answered — [1], [2] or [1,2]",
          "recommendation": "proceed | proceed_with_caution | hold | block | insufficient_data",
          "additionalPayoutWallets": "present only when the offers disagree about the recipient"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "url"
              ],
              "properties": {
                "url": {
                  "type": "string",
                  "description": "REQUIRED. The x402 endpoint to screen, e.g. https://example.com/v1/thing."
                },
                "chain": {
                  "type": "string",
                  "description": "OPTIONAL. Only \"base\" is served; any other value is refused rather than answered from the wrong chain."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "flags": {
                  "description": "array of {code, severity, title, detail}"
                },
                "offers": {
                  "description": "every advertised offer: payTo, network, asset, amount, version"
                },
                "paywalled": {
                  "description": "whether the endpoint answered 402 with a parseable payment offer"
                },
                "components": {
                  "description": "per-rule scoring breakdown"
                },
                "trustScore": {
                  "description": "0-100 for the payout wallet; null when no rule could be evaluated"
                },
                "payoutWallet": {
                  "description": "the address scored"
                },
                "x402Versions": {
                  "description": "which protocol generations answered — [1], [2] or [1,2]"
                },
                "recommendation": {
                  "description": "proceed | proceed_with_caution | hold | block | insufficient_data"
                },
                "additionalPayoutWallets": {
                  "description": "present only when the offers disagree about the recipient"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-09-03 21:34Z

Last indexed by Roundhouse

2026-09-24 08:10Z

Last enriched (probe, favicon, geo)

2026-09-12 14:15Z

x402 version

2

Max timeout

60s

Liveness probe

HTTP 402