Roundhouse

payai.agentstools.dev

Notarizes documents or data in exchange for a small crypto payment.

DataLiveeip155:8453Exactvia facilitator:dexter
https://payai.agentstools.dev/notarize
Settlements · 30d
804↓ 6.7%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$42.94
Verified settled volume
3,787 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0080
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
0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493

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.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493",
      "amount": "8000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
      },
      "payTo": "AytHnvc6bZx1ALTy7b5Px7hcavoSYszG9aeKvDcZ8R1u",
      "amount": "8000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://payai.agentstools.dev/notarize",
    "tags": [
      "attestation",
      "notarize",
      "provenance",
      "eip712",
      "eas",
      "signature",
      "sha256",
      "timestamp",
      "verifiable",
      "integrity",
      "web-proof",
      "oracle"
    ],
    "mimeType": "application/json",
    "description": "Notarize a public URL: we fetch it ourselves and return a signed snapshot (final URL, HTTP status, content-type, sha256 of the body, server timestamp, upstream host) with TWO cryptographic attestations — a plain EIP-712 signature and an EAS off-chain (Version2) attestation. Proves what this endpoint observed at fetch time (integrity + timestamp + non-repudiation). mode=hash (default) returns metadata + hash only; mode=full also returns the body.",
    "serviceName": "notarize"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "url": "https://example.com",
            "mode": "hash"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "mode": "hash",
            "attestor": "0x48Cb...8960",
            "snapshot": {
              "sha256": "0xb1946ac9...",
              "final_url": "https://example.com/",
              "fetched_at": "2026-07-03T00:00:00Z",
              "http_status": 200,
              "content_type": "text/html",
              "upstream_host": "example.com",
              "content_length": 1256
            },
            "attestations": {
              "eip712": {
                "signer": "0x48Cb...8960",
                "signature": "0x..."
              },
              "eas_offchain": {
                "uid": "0x...",
                "signer": "0x48Cb...8960"
              }
            }
          }
        }
      },
      "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": [
                  "url"
                ],
                "properties": {
                  "url": {
                    "type": "string",
                    "description": "Public http(s) URL to fetch and notarize"
                  },
                  "mode": {
                    "enum": [
                      "hash",
                      "full"
                    ],
                    "type": "string",
                    "description": "hash = metadata + sha256 only (default); full = also return the fetched body (base64)"
                  },
                  "network": {
                    "type": "string",
                    "description": "Reserved (attestations are chainId 8453 / Base)"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object"
              }
            }
          }
        }
      }
    }
  },
  "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.

0.008USDC≈ $0.008 USD
on Base · exact scheme

Pay 0.008 USDC on Base to 0xF22e…Ff493. The signed payment is good for 5 minutes.

Paid to
0xF22e…Ff493
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
8000 smallest units
8000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
AytHnv…Z8R1u
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493",
    "amount": "8000",
    "scheme": "exact",
    "network": "eip155:8453",
    "resource": "https://payai.agentstools.dev/notarize",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"
    },
    "payTo": "AytHnvc6bZx1ALTy7b5Px7hcavoSYszG9aeKvDcZ8R1u",
    "amount": "8000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "resource": "https://payai.agentstools.dev/notarize",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog
2026-09-23 19:28Z
Last indexed by Roundhouse
2026-09-24 10:15Z
Last enriched (probe, favicon, geo)
2026-09-15 18:45Z
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 payai.agentstools.dev 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=payai.agentstools.dev'
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://payai.agentstools.dev/notarize, 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.