Roundhouse

Log Schema Audit

Audit newline-delimited JSON logs against a contract, and across the whole set. The two findings that need every line at once: a field whose type varies between lines, so an index either rejects the minority or coerces them silently; and a message field with nearly as many distinct values as lines, which is interpolated rather than templated so nothing groups and cost scales with volume. Also reports absent required fields, a level differing only in case, and a timestamp with no offset.

Tradingofflineeip155:8453Exactvia cdp
https://api.zfinia.com/x402/v1/log-schema-contract-audit
Structured loggingData qualityObservabilityCost controlDeveloper tooling
Settlements · 30d
218↓ 56%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$25.30
Verified settled volume
255 settlements proven x402 by their on-chain EIP-3009 marker.
$0.190
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 2026-10-04 08:33Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x25e8245f07d5e4873987293dad666afbe56a9608

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.

0.19USDC≈ $0.19 USD
on Base · exact scheme

Pay 0.19 USDC on Base to 0x25e8…a9608. The signed payment is good for 1 minute.

Paid to
0x25e8…a9608
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
190000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
    "amount": "190000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "logs": "{\"timestamp\":\"2026-10-02T12:00:00.000Z\",\"level\":\"info\",\"message\":\"request completed\",\"status\":200,\"duration_ms\":12}\n{\"timestamp\":\"2026-10-02T12:00:01.000Z\",\"level\":\"ERROR\",\"message\":\"request failed for order 8827341 after 3 retries\",\"status\":500,\"duration_ms\":\"940\"}\n{\"timestamp\":\"2026-10-02T12:00:02.000Z\",\"level\":\"info\",\"message\":\"request failed for order 8827342 after 1 retries\",\"status\":500,\"duration_ms\":880}\n{\"timestamp\":\"2026-10-02 12:00:03.000\",\"level\":\"warn\",\"message\":\"request failed for order 8827343 after 2 retries\",\"status\":503}\n{\"timestamp\":\"2026-10-02T12:00:04.000Z\",\"level\":\"info\",\"message\":\"request failed for order 8827344 after 1 retries\",\"status\":500,\"duration_ms\":790}\n{\"level\":\"info\",\"message\":\"request failed for order 8827345 after 4 retries\",\"status\":500,\"duration_ms\":1200}\n{\"timestamp\":\"2026-10-02T12:00:06.000Z\",\"level\":\"info\",\"message\":\"request failed for order 8827346 after 2 retries\",\"status\":500,\"duration_ms\":810}\n{\"timestamp\":\"2026-10-02T12:00:07.000Z\",\"level\":\"info\",\"message\":\"request failed for order 8827347 after 1 retries\",\"status\":500,\"duration_ms\":760}\n{\"timestamp\":\"2026-10-02T12:00:08.000Z\",\"level\":\"info\",\"message\":\"request failed for order 8827348 after 3 retries\",\"status\":500,\"duration_ms\":920}\n{\"timestamp\":\"2026-10-02T12:00:09.000Z\",\"level\":\"info\",\"message\":\"request failed for order 8827349 after 1 retries\",\"status\":500,\"duration_ms\":700}\n{not json at all",
          "contract": {
            "field_types": {
              "status": "number",
              "duration_ms": "number"
            },
            "required_fields": [
              "timestamp",
              "level",
              "message",
              "service"
            ],
            "permitted_levels": [
              "debug",
              "info",
              "warn",
              "error"
            ],
            "require_timestamp_offset": true
          }
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "fields": [
            {
              "field": "timestamp",
              "types": {
                "string": 9
              }
            },
            {
              "field": "level",
              "types": {
                "string": 10
              }
            },
            {
              "field": "message",
              "types": {
                "string": 10
              }
            }
          ],
          "limits": {
            "maxLines": 20000,
            "maxSpans": 10000,
            "maxFields": 500,
            "maxSamples": 20000,
            "maxFindings": 500,
            "maxJsonBytes": 2097152
          },
          "passed": false,
          "checked": {
            "field_types": 2,
            "required_fields": 4,
            "permitted_levels": 4,
            "timestamp_offset": true
          },
          "complete": true,
          "findings": [
            {
              "code": "LINE_NOT_VALID_JSON",
              "line": 11,
              "detail": "Line 11 is not valid JSON: Expected property name or '}' in JSON at position 1 (line 1 column 2). Whatever ships this line is dropped by the collector."
            },
            {
              "code": "REQUIRED_FIELD_ABSENT",
              "line": 1,
              "field": "service",
              "detail": "Line 1 is missing service, so whatever filters on it drops this line."
            },
            {
              "code": "REQUIRED_FIELD_ABSENT",
              "line": 2,
              "field": "service",
              "detail": "Line 2 is missing service, so whatever filters on it drops this line."
            }
          ],
          "conformant": false,
          "line_count": 10,
          "request_id": "example-request",
          "service_id": "log_schema_contract_audit",
          "assumptions": [
            "No log value is ever returned, only field names, types and counts. A log line is the one place a credential or a customer record is most likely to be, so echoing values back would be the problem rathe...",
            "A field whose type varies between lines is reported because it is only visible across the whole set, and because an index either rejects the minority or coerces them without saying so.",
            "A message field with nearly as many distinct values as lines is reported as interpolated rather than templated: the message is the grouping key, so cost then scales with volume instead of with distinc..."
          ],
          "field_count": 5,
          "limitations": [
            "The lines supplied against the contract supplied. What a particular backend does with them, and whether the values are true, are outside this.",
            "conformant is true only when every line parsed and every check that ran found nothing."
          ],
          "observed_at": "2026-10-02T00:00:00.000Z",
          "not_examined": [],
          "finding_count": 18,
          "service_version": "1.0.0",
          "findings_by_code": {
            "TIMESTAMP_ABSENT": 1,
            "LEVEL_CASE_DIFFERS": 1,
            "FIELD_TYPE_MISMATCH": 1,
            "LINE_NOT_VALID_JSON": 1,
            "REQUIRED_FIELD_ABSENT": 11,
            "TIMESTAMP_WITHOUT_OFFSET": 1,
            "FIELD_TYPE_VARIES_BETWEEN_LINES": 1,
            "MESSAGE_IS_INTERPOLATED_NOT_TEMPLATED": 1
          },
          "with_timestamp_count": 9,
          "distinct_message_count": 10
        }
      }
    },
    "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": [
                "logs",
                "contract"
              ],
              "properties": {
                "logs": {
                  "type": "string",
                  "maxLength": 2097152
                },
                "contract": {
                  "type": "object",
                  "properties": {
                    "field_types": {
                      "type": "object"
                    },
                    "level_field": {
                      "type": "string",
                      "maxLength": 128
                    },
                    "message_field": {
                      "type": "string",
                      "maxLength": 128
                    },
                    "required_fields": {
                      "type": "array",
                      "items": {
                        "type": "string",
                        "maxLength": 256
                      },
                      "maxItems": 500,
                      "minItems": 1
                    },
                    "timestamp_field": {
                      "type": "string",
                      "maxLength": 128
                    },
                    "permitted_levels": {
                      "type": "array",
                      "items": {
                        "type": "string"
                      },
                      "maxItems": 50,
                      "minItems": 1
                    },
                    "require_timestamp_offset": {
                      "type": "boolean"
                    }
                  },
                  "additionalProperties": false
                }
              },
              "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"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-10-04 08:33Z
Last indexed by Roundhouse
2026-10-05 00:20Z
Last enriched (probe, favicon, geo)
2026-10-04 16:45Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 0
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 Log Schema Audit 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=Log%20Schema%20Audit'
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://api.zfinia.com/x402/v1/log-schema-contract-audit, 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.