AttestPage

Use when an agent is about to install or recommend a package an LLM suggested: send up to 10 names, each with its registry (npm, pypi or crates), and get back whether the registry lists each name (exists true/false), latest version, licence, links, creation time and flags (deprecated, yanked, created_recently, name_differs), under one signed receipt, so a made-up package name is caught before install. Not a security verdict. A batch where every lookup fails gets 502 and is not charged.

InferenceUnknowneip155:84532Exactvia facilitator:payAI
Package-hallucinationNpmPypiCrates-ioVerification
Settlements · 30d
3
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.42
Verified settled volume
20 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
–
Calls · 30d
Upstream's own call count for this endpoint, not ours.
–
Unique payers · 30d
Never called
–
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x08dE2e056F6BE74162c400fF877449593579D1EA

The wallet the 402 directs payment to. Its full payment record is on the merchant page.

Asset 0x036CbD53842c5426634e7929541eC2318f3dCF7e

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.

Recent payments · which agents last used it

Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.

Payer PayeeChainAmountx402RouteAgeTxn hash
0xcd0f…b9600x08de…d1eaBase SepoliaBase Sepolia$0.01100%payAI26d ago0x46aded…71e632
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.002100%payAI27d ago0x645fa6…947f01
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.005100%payAI27d ago0x04f05e…3fa532
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.003100%payAI31d ago0x4ca16f…0aaab9
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.002100%payAI31d ago0xf878b4…6b7601
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.003100%payAI31d ago0xa692c6…1839aa
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.003100%payAI31d ago0xd16e46…dee76f
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.003100%payAI31d ago0x081381…83017d
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.003100%payAI31d ago0x34831f…aeb083
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0xa3cd88…cd63fc
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0x2e8eed…1680a8
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0x142afb…c51212
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0xe548f6…5ffb9e
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0x1e98eb…a906c9
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0xf3fd15…cf9380
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.02100%payAI31d ago0x2aec07…09b8a7
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.10100%payAI32d ago0x57d621…b860c4
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.04100%payAI32d ago0xb43485…4502a8
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.10100%payAI32d ago0x5c1d88…2e0a9f
0xb4dd…3d310x08de…d1eaBase SepoliaBase Sepolia$0.005100%payAI32d ago0x797637…f4fb15

Accepts

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

0.005USDC≈ $0.005 USD
on Base Sepolia · exact scheme

Pay 0.005 USDC on Base Sepolia to 0x08dE…9D1EA. The signed payment is good for 2 minutes.

USD Coin (Base Sepolia) contract
0x036C…dCF7e
Payment window
2 minutes
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0x08dE2e056F6BE74162c400fF877449593579D1EA",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:84532",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "packages": [
            {
              "name": "left-pad",
              "ecosystem": "npm"
            },
            {
              "name": "requests",
              "ecosystem": "pypi"
            },
            {
              "name": "serde",
              "ecosystem": "crates"
            }
          ]
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "note": "exists means the registry listed this name when we looked. It is not a security verdict: the package may still be malicious, unmaintained or not the one you meant; description and licence are the publisher's own text.",
          "tier": "paid",
          "receipt": "eyJ…",
          "results": [
            {
              "name": "left-pad",
              "exists": true,
              "status": "found",
              "yanked": null,
              "license": "WTFPL",
              "signals": [
                "deprecated"
              ],
              "homepage": "https://github.com/stevemao/left-pad#readme",
              "ecosystem": "npm",
              "created_at": "2014-03-14T09:09:20.762Z",
              "deprecated": "use String.prototype.padStart()",
              "raw_sha256": "…",
              "repository": "git+ssh://git@github.com/stevemao/left-pad.git",
              "description": "String left pad",
              "registry_url": "https://www.npmjs.com/package/left-pad",
              "latest_version": "1.3.0"
            }
          ]
        }
      }
    },
    "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": [
                "packages"
              ],
              "properties": {
                "packages": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "ecosystem",
                      "name"
                    ],
                    "properties": {
                      "name": {
                        "type": "string",
                        "description": "Package name as you would install it (npm names may be scoped: @scope/name)."
                      },
                      "ecosystem": {
                        "enum": [
                          "npm",
                          "pypi",
                          "crates"
                        ],
                        "type": "string"
                      }
                    },
                    "additionalProperties": false
                  },
                  "maxItems": 10,
                  "minItems": 1,
                  "description": "1 to 10 packages to look up. Each is { ecosystem, name }; ecosystem is npm, pypi or crates (crates.io)."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "results",
                "note",
                "receipt"
              ],
              "properties": {
                "note": {
                  "type": "string"
                },
                "tier": {
                  "type": "string"
                },
                "receipt": {
                  "type": "string"
                },
                "results": {
                  "type": "array"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-12 05:51Z
Last indexed by Roundhouse
2026-10-19 03:45Z
Last enriched (probe, favicon, geo)
–
x402 version
2
Max timeout
120s
Liveness probe
Not probed
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 AttestPage 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=AttestPage'
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://vehcdj664efetfrsolne5umanq.srv.us/v1/check/packages, 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. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://preview.roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

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