Roundhouse

x402.fiasignals.com

0.005 USDC /token-safety/lite check for Base/EVM swap agents: pay with x402 on Base USDC and get a compact proceed/caution/block verdict before signing or routing a swap.

SearchLiveeip155:8453Exactvia cdp
https://x402.fiasignals.com/pre-trade-risk/batch
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 11 snapshots so far.
$4.03
Verified settled volume
45 settlements proven x402 by their on-chain EIP-3009 marker.
$0.030
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-17 06:17Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F

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.

Accepts

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

0.03USDC≈ $0.03 USD
on Base · exact scheme

Pay 0.03 USDC on Base to 0x8D32…a853F. The signed payment is good for 5 minutes.

Paid to
0x8D32…a853F
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
30000 smallest units
0.5USDC≈ $0.5 USD
on Base · exact scheme

Pay 0.5 USDC on Base to 0x8D32…a853F. The signed payment is good for 5 minutes.

Paid to
0x8D32…a853F
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
500000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
    "amount": "30000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x8D32c6a3EE3fB8a8b4c5378F7C5a26CC320a853F",
    "amount": "500000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "tags": [
        "token safety",
        "pre-trade risk",
        "safe swap preflight",
        "rugpull",
        "honeypot",
        "Base"
      ],
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "chain": "base",
          "token_addresses": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913,0x4200000000000000000000000000000000000006"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "count": 3,
          "results": [
            {
              "action": "PROCEED",
              "verdict": "safe",
              "safety_score": 90
            }
          ],
          "summary": {
            "safe": 1,
            "risky": 1,
            "blocked": 1
          }
        }
      },
      "upsell": {
        "id": "bundled-risk-pack",
        "name": "Fia Signals Bundled Risk Pack",
        "status": "payable_x402_route_live",
        "delivers": [
          "combined token safety and smart contract risk summary",
          "up to 5 Base/EVM contracts from the existing batch payload",
          "ranked proceed/caution/reject queue",
          "aggregate blocker reasons and warnings",
          "buyer-facing next-action memo for swap routers",
          "strict proof fields for revenue reconciliation"
        ],
        "price_usdc": "0.50",
        "buyer_action": "Use this as the next paid step after any /token-safety, /token-safety/batch, /pre-trade-risk, or /pre-trade-risk/batch hit. Do not buy another isolated starter check when the agent needs a ranked swap decision packet.",
        "truth_status": "not_revenue_until_distinct_external_0_50_payment_tx_ref_or_completed_acp_job",
        "payable_route": "https://x402.fiasignals.com/bundled-risk-pack",
        "starter_routes": [
          "https://x402.fiasignals.com/token-safety/batch",
          "https://x402.fiasignals.com/contract-risk/batch"
        ],
        "amount_raw_usdc": "500000",
        "payable_methods": [
          "GET",
          "POST"
        ],
        "accepts_ordering": "starter_first_bundle_second",
        "non_breaking_policy": "Keep existing 0.03 USDC batch endpoints unchanged. Buyers who want the 0.50 USDC bundle should pay the distinct bundled-risk-pack route.",
        "target_buyer_signal": "Repeat buyers using token-safety and contract-risk batch checks who need a larger pre-swap risk packet instead of another isolated 0.03 USDC call.",
        "starter_accepts_index": 0,
        "preferred_accepts_index": 1,
        "starter_amount_raw_usdc": "30000",
        "preferred_selection_hint": "Starter buyers can use accepts[0] at 30000 raw USDC. Repeat buyers, multi-token buyers, and agents that already know they need a combined risk memo should select accepts[1] at 500000 raw USDC or pay the distinct bundled-risk-pack route; accepts[0] remains the 30000 raw USDC starter.",
        "preferred_amount_raw_usdc": "500000",
        "recommended_for_repeat_buyers": true
      },
      "iconUrl": "https://x402.fiasignals.com/favicon.ico",
      "serviceName": "Fia Signals Pre-Trade Risk Batch",
      "dedup_alert_discipline": {
        "rule": "one reconcile per unique x402 tx_ref across x402_events and x402_sales",
        "watcher": "tools/x402_bundle_watch.py",
        "suppress": "duplicate alerts for the same tx_ref are operating noise, not new revenue",
        "fallback_key": "payment_proof_fingerprint, then endpoint+buyer+amount+timestamp_bucket when tx_ref is missing",
        "dedupe_priority": [
          "tx_ref",
          "payment_proof_fingerprint",
          "endpoint+buyer+amount+timestamp_bucket"
        ]
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "queryParams"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "POST"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "token_addresses"
              ],
              "properties": {
                "chain": {
                  "type": "string",
                  "default": "base"
                },
                "token_addresses": {
                  "type": "string",
                  "description": "Comma-separated EVM token addresses, maximum 5."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type",
            "example"
          ],
          "properties": {
            "chain": {
              "type": "string"
            },
            "count": {
              "type": "integer",
              "maximum": 5,
              "minimum": 1
            },
            "limit": {
              "type": "integer",
              "const": 5
            },
            "results": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "action": {
                    "type": "string"
                  },
                  "reasons": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  },
                  "sources": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  },
                  "verdict": {
                    "enum": [
                      "safe",
                      "risky",
                      "blocked",
                      "error"
                    ],
                    "type": "string"
                  },
                  "warnings": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  },
                  "confidence": {
                    "type": "string"
                  },
                  "raw_checks": {
                    "type": "object"
                  },
                  "safety_score": {
                    "type": "integer",
                    "maximum": 100,
                    "minimum": 0
                  }
                }
              }
            },
            "summary": {
              "type": "object",
              "properties": {
                "safe": {
                  "type": "integer"
                },
                "error": {
                  "type": "integer"
                },
                "risky": {
                  "type": "integer"
                },
                "blocked": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    },
    "category": "finance",
    "description": "Base/EVM batch token safety, smart-contract risk, rugpull and honeypot pre-swap verdict for up to 5 contracts. Returns PROCEED, CAUTION or REJECT with safety scores, warnings, source evidence, aggregate counts and no-execution flags.",
    "discoverable": true
  }
}

Provenance

Seen in the source catalog
2026-09-17 06:17Z
Last indexed by Roundhouse
2026-09-24 08:50Z
Last enriched (probe, favicon, geo)
2026-09-22 19:15Z
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

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 11 snapshots so far. 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 x402.fiasignals.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=x402.fiasignals.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://x402.fiasignals.com/pre-trade-risk/batch, 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.