MCP Fixture Validation
Validate a suite of recorded tool calls against the current MCP manifest and get the failing call index, tool and pointer for each breach. The regression gate for a team that keeps recorded calls as fixtures: after a server update, this says which fixtures no longer satisfy the tools they call. Nothing is executed.
Tradingofflineeip155:8453Exactvia cdp
McpAgent toolingFixturesRegression testingDeveloper tooling
Settlements · 30d
219↓ 38%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$25.35
Verified settled volume
256 settlements proven x402 by their on-chain EIP-3009 marker.
$0.140
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 07:57Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x25e8245f07d5e4873987293dad666afbe56a9608The 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.
0.14USDC≈ $0.14 USD
on Base · exact scheme
Pay 0.14 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
- 140000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"amount": "140000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"calls": [
{
"name": "list_orders",
"arguments": {
"tenant_id": "acme"
}
},
{
"name": "list_orders",
"arguments": {
"page": 2,
"tenant_id": "acme"
}
},
{
"name": "list_orders",
"arguments": {
"page": 3,
"tenant_id": "acme"
}
},
{
"name": "get_order",
"arguments": {
"order_id": "o-1"
}
},
{
"method": "tools/call",
"params": {
"name": "get_order",
"arguments": {
"order_id": "o-2"
}
}
},
{
"name": "get_order",
"arguments": {
"id": "o-3"
}
},
{
"name": "archive_order",
"arguments": {
"order_id": "o-4"
}
}
],
"toolset": {
"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": {
"valid": false,
"limits": {
"maxCalls": 1000,
"maxTools": 400,
"maxServers": 20,
"maxFindings": 500,
"confusableOverlap": 0.6
},
"passed": false,
"complete": true,
"findings": [
{
"call": 5,
"code": "REQUIRED_PROPERTY_MISSING",
"tool": "get_order",
"detail": "Call 5 to get_order: Required property order_id is absent.",
"pointer": "/order_id"
},
{
"call": 6,
"code": "CALL_TO_UNDECLARED_TOOL",
"tool": "archive_order",
"detail": "Call 6: archive_order is not declared in the toolset."
}
],
"request_id": "example-request",
"service_id": "mcp_tool_call_fixture_validation",
"assumptions": [
"A recorded call is read from the flat shape or from JSON-RPC params, because both appear in real transcripts.",
"A call with no arguments object is valid only when the tool requires nothing.",
"Nothing is executed. This validates the shape of recorded calls against the current manifest."
],
"limitations": [
"Argument conformance against the current manifest. Whether the call would have succeeded is not assessed.",
"valid is true only when every call was validated against a usable schema and none failed."
],
"observed_at": "2026-10-02T00:00:00.000Z",
"not_examined": [],
"finding_count": 2,
"read_call_count": 7,
"service_version": "1.0.0",
"findings_by_code": {
"CALL_TO_UNDECLARED_TOOL": 1,
"REQUIRED_PROPERTY_MISSING": 1
},
"valid_call_count": 5,
"first_failing_call": 5,
"invalid_call_count": 1,
"supplied_call_count": 7,
"undeclared_tool_call_count": 1
}
}
},
"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": [
"toolset",
"calls"
],
"properties": {
"calls": {
"type": "array",
"items": {
"type": "object"
},
"maxItems": 1000,
"minItems": 1
},
"toolset": {},
"stop_after_failures": {
"type": "integer",
"minimum": 1
}
},
"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 07:57Z
- Last indexed by Roundhouse
- 2026-10-05 00:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-04 11:16Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 0
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.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service MCP Fixture Validation 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=MCP%20Fixture%20Validation' 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/mcp-tool-call-fixture-validation, 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.