Roundhouse AI

agentguard.hergertsynthora.com

AgentGuard is an x402 pre-trade safety check for AI payment & DeFi agents. ONE paid POST returns a signed SAFE / CAUTION / BLOCK verdict combining OFAC/EU/UN/UK sanctions screening, stablecoin depeg detection, and counterparty on-chain risk. $0.02 USDC on Base. Ed25519-signed, verifiable offline.

TradingLiveeip155:8453Exactvia cdp
https://agentguard.hergertsynthora.com/service
Settlements · 30d
3
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$6.81
Verified settled volume
397 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-18 07:05Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x10800a5a5B9d72251566EC651E862A8b4B427dE0

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

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

{
  "menu": {
    "sla": "https://api.hergertsynthora.com/sla",
    "menu": "https://api.hergertsynthora.com/llms.txt",
    "note": "SYNTHORA: 120+ machine-payable data and risk services. Pay per call in USDC on Base via x402. Signed Ed25519 receipts.",
    "terms": "https://hergertsynthora.com/terms",
    "catalog": "https://catalog.hergertsynthora.com/catalog.json",
    "openapi": "https://api.hergertsynthora.com/openapi.json"
  },
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.hergertsynthora.com/v1/agentguard",
      "description": "SYNTHORA AgentGuard: pre-trade safety verdict (SAFE/CAUTION/BLOCK) for payment/DeFi agents BEFORE they transact. One signed call combines OFAC SDN sanctions screening (address + counterparty), stablecoin peg deviation in bps (DefiLlama/CoinGecko) and counterparty on-chain signal (Base: balance + tx history). Ed25519-signed attestation. Scoring only - never executes trades. POST {\"address\":\"0x..\",\"chain\":\"base\",\"counterparty\":\"0x..\",\"stablecoin\":\"usdc\"}. 0.02 USDC on Base.",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.hergertsynthora.com/v1/agentguard",
    "tags": [
      "pre-trade safety",
      "agent guard",
      "sanctions screening",
      "OFAC SDN",
      "stablecoin depeg",
      "counterparty risk",
      "x402",
      "Base",
      "DeFi compliance",
      "SAFE CAUTION BLOCK verdict"
    ],
    "iconUrl": "https://api.hergertsynthora.com/icon.svg",
    "mimeType": "application/json",
    "description": "SYNTHORA AgentGuard: pre-trade safety verdict (SAFE/CAUTION/BLOCK) for payment/DeFi agents BEFORE they transact. One signed call combines OFAC SDN sanctions screening (address + counterparty), stablecoin peg deviation in bps (DefiLlama/CoinGecko) and counterparty on-chain signal (Base: balance + tx history). Ed25519-signed attestation. Scoring only - never executes trades. POST {\"address\":\"0x..\",\"chain\":\"base\",\"counterparty\":\"0x..\",\"stablecoin\":\"usdc\"}. 0.02 USDC on Base.",
    "serviceName": "SYNTHORA"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "chain": "base",
            "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
            "stablecoin": "usdc",
            "counterparty": "0x28C6c06298d514Db089934071355E5743bf21d60"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "ok": true,
            "niche": "agentguard",
            "result": {
              "checks": {
                "sanctions": {
                  "hits": []
                },
                "counterparty": {
                  "tx_count": 42,
                  "balance_eth": 1.2
                },
                "stablecoin_peg": {
                  "deviation_bps": 0.1
                }
              },
              "reasons": [
                "..."
              ],
              "verdict": "SAFE"
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "address"
                ],
                "properties": {
                  "chain": {
                    "type": "string",
                    "description": "base (default)"
                  },
                  "address": {
                    "type": "string",
                    "description": "EVM address to evaluate (0x.., required)"
                  },
                  "stablecoin": {
                    "type": "string",
                    "description": "settlement stablecoin: usdc|usdt|dai (default usdc)"
                  },
                  "counterparty": {
                    "type": "string",
                    "description": "optional 2nd address"
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "ok": {
                  "type": "boolean"
                },
                "type": "object",
                "niche": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    },
    "delivery": {
      "note": "unlike the signature -- which you verify BEFORE paying -- this one is checked afterwards, on-chain, from your own wallet",
      "order": "compute -> failure gate -> verify -> settle -> deliver",
      "scope": "this covers service FAILURE, not verdict quality",
      "policy": "no-charge-on-service-failure",
      "verify": "after a request of yours FAILS, check your own wallet on Base: no USDC settlement to our payTo will exist for it. If we had charged you, the transfer would be public and permanent",
      "behaviour": "if the service FAILS (invalid input, timeout, stale cache, withdrawn product, malformed output) you receive 402 and are NOT charged"
    },
    "signature": {
      "alg": "ed25519",
      "canon": "json:sort_keys+separators(,:)+ensure_ascii+utf8",
      "verify": "recompute canon from envelope.result, then VerifyKey(bytes.fromhex(pubkey)).verify(canon, bytes.fromhex(sig)) -- no name to trust, verify the signature yourself",
      "jwksUrl": "https://api.hergertsynthora.com/.well-known/jwks.json",
      "envelope": "{result, attestation:{alg,pubkey,sig,canon}}",
      "sigEncoding": "hex(64B raw)",
      "publicKeyUrl": "https://api.hergertsynthora.com/pubkey"
    }
  },
  "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.

0.02USDC≈ $0.02 USD
on Base · exact scheme

Pay 0.02 USDC on Base to 0x1080…27dE0. The signed payment is good for 5 minutes.

Paid to
0x1080…27dE0
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
20000 smallest units
Buys
x402 Agent Pre-Trade Safety: ONE signed call returns a pre-execution risk verdict (SAFE/CAUTION/BLOCK) for payment/DeFi agents. Combines OFAC SDN/EU/UN/UK sanctions screening + stablecoin peg deviation (bps vs $1) + counterparty on-chain signal into one Ed25519-signed attestation. POST {address, chain?, counterparty?, stablecoin?}. Scoring/data only — never executes trades or moves funds.
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0",
    "amount": "20000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://agentguard.hergertsynthora.com/service",
    "description": "x402 Agent Pre-Trade Safety: ONE signed call returns a pre-execution risk verdict (SAFE/CAUTION/BLOCK) for payment/DeFi agents. Combines OFAC SDN/EU/UN/UK sanctions screening + stablecoin peg deviation (bps vs $1) + counterparty on-chain signal into one Ed25519-signed attestation. POST {address, chain?, counterparty?, stablecoin?}. Scoring/data only — never executes trades or moves funds.",
    "maxAmountRequired": "20000",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "chain": "base",
          "address": "0x8589427373d6d84e98730d7795d8f6f8731fda16",
          "stablecoin": "usdc",
          "counterparty": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "ok": true,
          "niche": "pretrade_safety",
          "result": {
            "verdict": "SAFE",
            "peg_status": {
              "ok": true,
              "stablecoin": "usd-coin",
              "deviation_bps": 3
            },
            "counterparty": {
              "risk_score": 0
            },
            "sanctions_ok": true
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "address"
              ],
              "properties": {
                "chain": {
                  "type": "string",
                  "description": "base|ethereum|polygon|arbitrum|optimism (default base)"
                },
                "address": {
                  "type": "string",
                  "description": "EVM address to evaluate (0x…, required)"
                },
                "stablecoin": {
                  "type": "string",
                  "description": "settlement stablecoin id/symbol (default usd-coin,tether)"
                },
                "counterparty": {
                  "type": "string",
                  "description": "optional 2nd address to screen/balance"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "ok": {
                "type": "boolean"
              },
              "type": "object",
              "niche": {
                "type": "string"
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-07-18 07:05Z
Last indexed by Roundhouse
2026-07-25 00:00Z
Last enriched (probe, favicon, geo)
2026-09-22 22:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service agentguard.hergertsynthora.com and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=agentguard.hergertsynthora.com'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://agentguard.hergertsynthora.com/service, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.