API · x402

One-time, stateless comparison of two supplied CSV snapshots for schema drift and aggre…

Name: One-time, stateless comparison of two supplied CSV snapshots for schema drift and aggregat
Price: 0.005 USD
Availability: InStock

One-time, stateless comparison of two supplied CSV snapshots for schema drift and aggregate quality changes. Does not retain files or return cell values; deterministic, no model call. $0.005 USDC on Base, Arbitrum, or Polygon.

by Agent Evidence Utility · verified provider · updated 2026-11-15

What it does

Tags: compare-csv-snapshots · csv-schema-drift-detection · csv-file-diff · csv-change-detection · csv-schema-comparison · one-time-csv-diff · etl · data-quality

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/79805.json for the price and payment options.
Pay. Call GET https://agent-evidence-extractor.defcronyke.workers.dev/v1/csv-diff. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Arbitrum One, Polygon, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, Arbitrum One, Polygon

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0xc4e484e62133dadac5be498ae3f311f5b8428cce	300s
exact	Arbitrum One eip155:42161	USDC	$0.005	0xc4e484e62133dadac5be498ae3f311f5b8428cce	300s
exact	Polygon eip155:137	USDC	$0.005	0xc4e484e62133dadac5be498ae3f311f5b8428cce	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xc4e484e62133dadac5be498ae3f311f5b8428cce",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "payTo": "0xc4e484e62133dadac5be498ae3f311f5b8428cce",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "payTo": "0xc4e484e62133dadac5be498ae3f311f5b8428cce",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "type": "object",
  "required": [
    "schema_changed",
    "contract_violations",
    "changes",
    "row_count",
    "structural_issues",
    "note"
  ],
  "additionalProperties": false,
  "properties": {
    "schema_changed": {
      "type": "boolean"
    },
    "contract_violations": {
      "type": "object",
      "required": [
        "unexpected_columns",
        "missing_required_columns"
      ],
      "properties": {
        "unexpected_columns": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "missing_required_columns": {
          "type": "array",
          "items": {
            "type": "string"
          }
        }
      }
    },
    "changes": {
      "type": "object",
      "required": [
        "added_columns",
        "removed_columns",
        "inferred_type_changes",
        "reordered_columns",
        "missing_rate_changes",
        "numeric_excursions"
      ],
      "properties": {
        "added_columns": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "removed_columns": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "inferred_type_changes": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "column",
              "before",
              "after"
            ],
            "properties": {
              "column": {
                "type": "string"
              },
              "before": {
                "type": "string"
              },
              "after": {
                "type": "string"
              }
            }
          }
        },
        "reordered_columns": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "column",
              "before_position",
              "after_position"
            ],
            "properties": {
              "column": {
                "type": "string"
              },
              "before_position": {
                "type": "integer"
              },
              "after_position": {
                "type": "integer"
              }
            }
          }
        },
        "missing_rate_changes": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "column",
              "before_missing_rate",
              "after_missing_rate",
              "delta"
            ],
            "properties": {
              "column": {
                "type": "string"
              },
              "before_missing_rate": {
                "type": "number"
              },
              "after_missing_rate": {
                "type": "number"
              },
              "delta": {
                "type": "number"
              }
            }
          }
        },
        "numeric_excursions": {
          "type": "array",
          "items": {
            "type": "object",
            "required": [
              "column",
              "before_out_of_bounds",
              "after_out_of_bounds",
              "delta"
            ],
            "properties": {
              "column": {
                "type": "string"
              },
              "before_out_of_bounds": {
                "type": "integer"
              },
              "after_out_of_bounds": {
                "type": "integer"
              },
              "delta": {
                "type": "integer"
              }
            }
          }
        }
      }
    },
    "row_count": {
      "type": "object",
      "properties": {
        "before": {
          "type": "integer"
        },
        "after": {
          "type": "integer"
        },
        "delta": {
          "type": "integer"
        }
      }
    },
    "structural_issues": {
      "type": "object",
      "properties": {
        "before_width_mismatch_records": {
          "type": "integer"
        },
        "after_width_mismatch_records": {
          "type": "integer"
        },
        "before_blank_records": {
          "type": "integer"
        },
        "after_blank_records": {
          "type": "integer"
        }
      }
    },
    "note": {
      "type": "string"
    }
  }
}

Example shape — generated from the schema, not a captured live response

{
  "schema_changed": true,
  "contract_violations": {
    "unexpected_columns": [
      "string"
    ],
    "missing_required_columns": [
      "string"
    ]
  },
  "changes": {
    "added_columns": [
      "string"
    ],
    "removed_columns": [
      "string"
    ],
    "inferred_type_changes": [
      {
        "column": "string",
        "before": "string",
        "after": "string"
      }
    ],
    "reordered_columns": [
      {
        "column": "string",
        "before_position": 0,
        "after_position": 0
      }
    ],
    "missing_rate_changes": [
      {
        "column": "string",
        "before_missing_rate": 0,
        "after_missing_rate": 0,
        "delta": 0
      }
    ],
    "numeric_excursions": [
      {
        "column": "string",
        "before_out_of_bounds": 0,
        "after_out_of_bounds": 0,
        "delta": 0
      }
    ]
  },
  "row_count": {
    "before": 0,
    "after": 0,
    "delta": 0
  },
  "structural_issues": {
    "before_width_mismatch_records": 0,
    "after_width_mismatch_records": 0,
    "before_blank_records": 0,
    "after_blank_records": 0
  },
  "note": "string"
}

Examples

curl

curl "https://agent-evidence-extractor.defcronyke.workers.dev/v1/csv-diff"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://agent-evidence-extractor.defcronyke.workers.dev/v1/csv-diff");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://agent-evidence-extractor.defcronyke.workers.dev/v1/csv-diff")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: Agent Evidence Utility
Endpoint: https://agent-evidence-extractor.defcronyke.workers.dev/v1/csv-diff
Machine-readable: /resources/79805.json