Roundhouse

EventTrace Change Events

Check what changed between two bounded public snapshots of a supported GitHub release, npm package, or example HTML page. Free POST /v1/prepare returns an immutable report_id; paid GET /v1/report returns structured change evidence. No continuous monitoring or arbitrary URLs.

SearchUnknowneip155:8453Exactvia cdp
https://eventtrace-x402.info-ethirion.workers.dev/v1/report
Change-detectionGithub-releasesNpm-packagesWeb-diff
Settlements · 30d
12↑ 100%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.16
Verified settled volume
12 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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 2026-10-26 07:47Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x15dBEC18A30457013c6a436FF25F607eF834c46C

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.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x15dB…4c46C. The signed payment is good for 5 minutes.

Paid to
0x15dB…4c46C
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x15dBEC18A30457013c6a436FF25F607eF834c46C",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "report_id": "ev_171c7c5652ab4a96b8c2292ab59a02a6"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "url": "https://example.com/",
          "delta": {
            "status": "initial"
          },
          "reportId": "ev_171c7c5652ab4a96b8c2292ab59a02a6",
          "snapshot": {},
          "observedAt": "2026-10-25T00:00:00.000Z"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "report_id"
              ],
              "properties": {
                "report_id": {
                  "type": "string",
                  "pattern": "^ev_[0-9a-f]{32}$",
                  "description": "ID returned by free POST /v1/prepare. This example identifies a stored public report."
                }
              },
              "additionalProperties": false
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "reportId",
                "url",
                "observedAt",
                "delta",
                "snapshot"
              ],
              "properties": {
                "url": {
                  "type": "string"
                },
                "delta": {
                  "type": "object",
                  "properties": {
                    "status": {
                      "enum": [
                        "initial",
                        "unchanged",
                        "changed"
                      ],
                      "type": "string"
                    },
                    "changes": {
                      "type": "array",
                      "items": {
                        "type": "object"
                      }
                    }
                  }
                },
                "reportId": {
                  "type": "string",
                  "pattern": "^ev_[0-9a-f]{32}$"
                },
                "snapshot": {
                  "type": "object"
                },
                "observedAt": {
                  "type": "string"
                }
              }
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-26 07:47Z
Last indexed by Roundhouse
2026-10-26 17:20Z
Last enriched (probe, favicon, geo)
—
x402 version
2
Max timeout
300s
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 EventTrace Change Events 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=EventTrace%20Change%20Events'
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://eventtrace-x402.info-ethirion.workers.dev/v1/report, 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://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

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