mcp required argument drift derived

api.zfinia.comInference derived

POST https://api.zfinia.com/x402/v1/mcp-required-argument-drift

passabsent from every registry#6 by calls of 15 on this host

0.1 USDC

per call, as the listing declares it on eip155:8453

Compare with another Every figure as JSON Cite this page

the price, as of 2026-10-04 21:22 UTC · method

Validation state: pass; as of 2026-10-04 14:24 UTC · method · sweep daily-2026-10-04
Uptime, 7 / 30 / 90 days: — / 50% / 50%; as of 2026-10-04 14:24 UTC · method · 0 of 0 in 7d, 1 of 2 in 30d, 1 of 2 in 90d
Calls, trailing 30 days: 1; as of 2026-10-04 21:22 UTC · method
Unique payers, trailing 30 days: 1; as of 2026-10-04 21:22 UTC · method
Last called: 2026-10-04 07:56 UTC; as of 2026-10-04 21:22 UTC · method
First observed by TOLLderived: 2026-10-04; as of 2026-10-04 12:19 UTC · method · observation began 10 September 2026; listings that predate it show that date
Pricederived: 0.1 USDC; as of 2026-10-04 21:22 UTC · method · on eip155:8453
Networks: 1; as of 2026-10-04 21:22 UTC · method

Counters

2 observations, 1 of them a change, fewer than the 3 a trace needs

How big is this endpoint among the ones like it?

Calls counted in the trailing thirty days across the 3,584 endpoints in Inference that carry counters, binned on a logarithmic scale because the range runs over five orders of magnitude. The marked bin is this endpoint, at 1: 2,378 in the category are counted higher and 1,205 lower.

No trace is drawn of this endpoint’s own volume. Its counters have changed 1 time across 2 observations, and 3 changes are the fewest this site will draw a trace through, because two points and a guess are not a series. Every observation is in the JSON.

In words

Among the 15 endpoints on api.zfinia.com, mcp required argument drift is tied 6th by calls with 10 others.

Requests carry a json body with the fields after and before.

mcp required argument drift returns json; the example shows limits, stable, complete, findings, request_id, service_id and 2 others.

mcp required argument drift drew a single call from a single payer in the trailing 30 days.

The last call to mcp required argument drift came 28 days before the snapshot, 2026-10-04.

It is priced at 0.1 USDC on Base.

mcp required argument drift takes 3% of the calls counted across api.zfinia.com.

TOLL files mcp required argument drift under inference: a POST endpoint on api.zfinia.com, listed in neither registry at the last pull.

mcp required argument drift answered the sweep of 2026-10-04 with a valid 402, passing 1 of 2 sweeps since 2026-10-04.

Closest in price to mcp required argument drift within inference: midas ops premium at midax402.com and perplexity chat at perplexity.x402.paywithlocus.com.

mcp required argument drift is priced above 85% of comparable listings in inference.

The payee wallet is shared by 179 listings across 5 hosts.

The seller's tags on mcp required argument drift are mcp, agent tooling, required arguments and release safety.

mcp required argument drift was missing from the Coinbase registry at the pull of 2026-10-05, confirmed at the pull of 2026-10-05; that is registry presence, not liveness.

The price of mcp required argument drift is declared by 174 other listings in inference too.

Where the sentences above compare this endpoint with others, the comparison is against the index as it stands now, live; the figures above are final.

Payment options as declared

the payment options, as of 2026-10-04 21:22 UTC · method

Every payment option declared on this listing
registry	network	asset	amount	scheme	pay to
Coinbase	eip155:8453	USDC	0.1 USDC	exact	0x25e824…6a9608

Preflight checks at the last sweep

the checks, as of 2026-10-04 14:24 UTC · methodendpoint answered HTTP 402

No named check failed.

Validation history, 90 days

Every sweep that observed this endpoint, newest first.

Validation observations over the last 90 days
observed, UTC	state	failed checks	sweep
2026-10-04 14:24 UTC	pass	0	daily-2026-10-04
2026-10-04 12:49 UTC	fail	1	new-after-daily-2026-10-04

Registry presence

Presence in a registry, not liveness of the service (method). Newest first.

2026-10-05 14:34 UTCabsence from Coinbase confirmed, rule v1
2026-10-05 05:36 UTCabsent from Coinbase at this pull
2026-10-04 12:19 UTClisted in Coinbase

Declared input and output, as listed

From the registry record, not validated by TOLL.the declared schema, as of 2026-10-04 07:56 UTC · method

The input and output block

{
  "input": {
    "body": {
      "after": {
        "tools": [
          {
            "name": "list_orders",
            "annotations": {
              "idempotentHint": true
            },
            "description": "List orders.",
            "inputSchema": {
              "type": "object",
              "required": [
                "tenant_id",
                "region"
              ],
              "properties": {
                "page": {
                  "type": "integer",
                  "minimum": 1,
                  "description": "Page number, starting at 1."
                },
                "region": {
                  "type": "string",
                  "description": "Data region to query."
                },
                "status": {
                  "enum": [
                    "open",
                    "shipped",
                    "disputed"
                  ],
                  "type": "string",
                  "description": "Restrict to one status."
                },
                "tenant_id": {
                  "type": "string",
                  "description": "The tenant whose orders to list."
                }
              }
            },
            "outputSchema": {
              "type": "object",
              "required": [
                "items"
              ],
              "properties": {
                "items": {
                  "type": "array"
                }
              }
            }
          },
          {
            "name": "get_order",
            "annotations": {
              "readOnlyHint": true
            },
            "description": "Fetch one order by its identifier, including line items and the current fulfilment state.",
            "inputSchema": {
              "type": "object",
              "required": [
                "order_id"
              ],
              "properties": {
                "order_id": {
                  "type": "string",
                  "description": "The order identifier."
                }
              }
            }
          },
          {
            "name": "cancel_order",
            "annotations": {
              "idempotentHint": false,
              "destructiveHint": true
            },
            "description": "Cancel an order that has not yet shipped. This cannot be undone and will issue a refund where one is due.",
            "inputSchema": {
              "type": "object",
              "required": [
                "order_id"
              ],
              "properties": {
                "reason": {
                  "type": "string",
                  "description": "Why it is being cancelled."
                },
                "order_id": {
                  "type": "string",
                  "description": "The order to cancel."
                }
              }
            }
          }
        ],
        "serverInfo": {
          "name": "orders-mcp",
          "version": "2.0.0"
        },
        "capabilities": {
          "tools": {
            "listChanged": false
          }
        }
      },
      "before": {
        "tools": [
          {
            "name": "list_orders",
            "annotations": {
              "readOnlyHint": true,
              "idempotentHint": true
            },
            "description": "List orders for a tenant, newest first, with optional paging. Returns only orders the caller is entitled to see.",
            "inputSchema": {
              "type": "object",
              "required": [
                "tenant_id"
              ],
              "properties": {
                "page": {
                  "type": "integer",
                  "minimum": 1,
                  "description": "Page number, starting at 1."
                },
                "status": {
                  "enum": [
                    "open",
                    "shipped"
                  ],
                  "type": "string",
                  "description": "Restrict to one status."
                },
                "tenant_id": {
                  "type": "string",
                  "description": "The tenant whose orders to list."
                }
              }
            },
            "outputSchema": {
              "type": "object",
              "required": [
                "items"
              ],
              "properties": {
                "items": {
                  "type": "array"
                },
                "next_page": {
                  "type": [
                    "integer",
                    "null"
                  ]
                }
              }
            }
          },
          {
            "name": "get_order",
            "annotations": {
              "readOnlyHint": true
            },
            "description": "Fetch one order by its identifier, including line items and the current fulfilment state.",
            "inputSchema": {
              "type": "object",
              "required": [
                "order_id"
              ],
              "properties": {
                "order_id": {
                  "type": "string",
                  "description": "The order identifier."
                }
              }
            },
            "outputSchema": {
              "type": "object",
              "required": [
                "id"
              ],
              "properties": {
                "id": {
                  "type": "string"
                },
                "total": {
                  "type": "number"
                }
              }
            }
          },
          {
            "name": "cancel_order",
            "annotations": {
              "idempotentHint": false,
              "destructiveHint": true
            },
            "description": "Cancel an order that has not yet shipped. This cannot be undone and will issue a refund where one is due.",
            "inputSchema": {
              "type": "object",
              "required": [
                "order_id"
              ],
              "properties": {
                "reason": {
                  "type": "string",
                  "description": "Why it is being cancelled."
                },
                "order_id": {
                  "type": "string",
                  "description": "The order to cancel."
                }
              }
            }
          }
        ],
        "serverInfo": {
          "name": "orders-mcp",
          "version": "1.3.0"
        },
        "capabilities": {
          "tools": {
            "listChanged": true
          },
          "resources": {
            "subscribe": true
          }
        }
      }
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "limits": {
        "maxCalls": 1000,
        "maxTools": 400,
        "maxServers": 20,
        "maxFindings": 500,
        "confusableOverlap": 0.6
      },
      "stable": false,
      "complete": true,
      "findings": [
        {
          "code": "REQUIRED_ARGUMENT_ADDED",
          "tool": "list_orders",
          "detail": "list_orders: region is new and required, so every existing call fails.",
          "argument": "region"
        }
      ],
      "request_id": "example-request",
      "service_id": "mcp_required_argument_drift",
      "assumptions": [
        "Tightening breaks every existing call; loosening means a tool may now be invoked without something it previously demanded.",
        "Tools present in only one manifest are left to mcp_toolset_diff rather than reported twice."
      ],
      "limitations": [
        "Argument obligation only. Value-level schema compatibility is mcp_breaking_change_report.",
        "stable is true only when both manifests were read in full and no obligation moved in either direction."
      ],
      "observed_at": "2026-10-02T00:00:00.000Z",
      "not_examined": [],
      "finding_count": 1,
      "loosened_count": 0,
      "tools_compared": 3,
      "service_version": "1.0.0",
      "tightened_count": 1,
      "findings_by_code": {
        "REQUIRED_ARGUMENT_ADDED": 1
      }
    }
  }
}

What the listing says

See which tool arguments changed obligation between two MCP manifests. Separates tightening, where every existing call now fails, from loosening, where a tool may be invoked without something it previously demanded. A newly required argument is the single change most likely to break an agent that was working yesterday.

the record, 2026-10-04 07:56 UTC · method

As declared

POST
eip155:8453
USDC
exact

Every tag is a field on the listing, not a keyword TOLL assigned.

Who is paid

0x25e824…6a9608

Takes payment for 179 endpoints on 5 hosts.

Among Inference

counted above0%

of 3,584 that carry counters

cheaper than85%

of 3,587 with a comparable price

3,681 endpoints are in this category. 174 declare exactly this price.

the comparison, 2026-11-01 05:59 UTC · method · live

Nearest on price

agent callapi.losbeto.xyz0.1 USDCpass
answeragent402.tools0.08 USDCpass
midas ops premiummidax402.com0.07 USDCmalformed
perplexity chatperplexity.x402.paywithlocus.com0.153 USDCpass
translateapi.strale.io0.054 USDClegacy v1

Same category, nearest declared price, one per payee wallet (method). the list, 2026-11-01 05:59 UTC · method · live

Elsewhere in the record

Cite this page

This endpoint is delisted: the page is frozen at its last observation and its live URL is the stable one. Data reuse is under CC BY 4.0 (terms).

Plain text

TOLL, "mcp required argument drift on api.zfinia.com". https://tollindex.com/e/api-zfinia-com-x402-v1-mcp-required-argument-drift-d39366. Accessed [access date].

BibTeX

@misc{toll-e-api-zfinia-com-x402-v1-mcp-required-argument-drift-d39366-2026-11-01,
  author = {TOLL},
  title = {mcp required argument drift on api.zfinia.com},
  howpublished = {\url{https://tollindex.com/e/api-zfinia-com-x402-v1-mcp-required-argument-drift-d39366}},
  year = {2026},
  month = {11},
  note = {Frozen at its last observation, 2026-11-01 05:59 UTC. Accessed [access date].}
}

Reports and replies about this endpoint

None yet. Anything submitted through the form below is published here with its outcome.

Report an error about mcp required argument drift, or reply as the named seller