Roundhouse AI

a2a-verifier-production.up.railway.app

Base L2 EVM token safety verifier: simulates buy/sell, transfer taxes, honeypot checks, proxy resolution, and liquidity. Pass ?token=<Base ERC-20 address>.

TradingLiveeip155:8453Exactvia cdp
https://a2a-verifier-production.up.railway.app/verify
Calls · 30d
7→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$0.95
Verified settled volume
19 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
7
Calls · 30d
Upstream's own call count for this endpoint, not ours.
5
Unique payers · 30d
Last called 2026-09-06 01:15Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x1D1173c1465c9a01F6AfA38B36cc1125CC55C71a

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.

0.05USDC≈ $0.05 USD
on Base · exact scheme

Pay 0.05 USDC on Base to 0x1D11…5C71a. The signed payment is good for 5 minutes.

Paid to
0x1D11…5C71a
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
50000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x1D1173c1465c9a01F6AfA38B36cc1125CC55C71a",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "chain": "base-mainnet",
          "token": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
          "recommendation": "SAFE_TO_TRADE",
          "schema_version": "1.1",
          "contract_analysis": {
            "is_proxy": false,
            "has_bytecode": true,
            "owner_address": null,
            "contract_renounced": true,
            "implementation_address": null
          },
          "liquidity_metrics": {
            "liquidity_usd": 1000000
          },
          "simulation_results": {
            "is_high_tax": false,
            "is_honeypot": false,
            "safety_score": 85,
            "effective_buy_tax_pct": 0,
            "simulated_buy_success": true,
            "effective_sell_tax_pct": 0,
            "simulated_sell_success": true,
            "unknown_storage_layout": false
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "token"
              ],
              "properties": {
                "token": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Base L2 ERC-20 token contract address (0x...)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "token",
                "simulation_results",
                "contract_analysis",
                "liquidity_metrics",
                "recommendation"
              ],
              "properties": {
                "chain": {
                  "type": "string"
                },
                "token": {
                  "type": "string"
                },
                "recommendation": {
                  "type": "string"
                },
                "schema_version": {
                  "type": "string"
                },
                "contract_analysis": {
                  "type": "object"
                },
                "liquidity_metrics": {
                  "type": "object"
                },
                "simulation_results": {
                  "type": "object"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-06 01:15Z
Last indexed by Roundhouse
2026-09-10 19:20Z
Last enriched (probe, favicon, geo)
2026-09-21 06:45Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 404
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. 18 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 a2a-verifier-production.up.railway.app 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=a2a-verifier-production.up.railway.app'
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://a2a-verifier-production.up.railway.app/verify, 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.