Skavio USDC Payment Verification & Proof MCP

Web fetch

web_fetch

Idempotent

Retrieve content from a public HTTPS document under robots.txt, SSRF and byte limits. Use for a source fetch; choose web_extract when only human-visible text is needed and web_monitor for content change hashes. This is a separately authenticated company Agent Tools relay; requires a valid Bearer API key, an enabled backend operation and an accepted payment mode. x402 returns a workload-specific quote and prepaid consumes shared company credits. Retry with the SAME idempotency_key and inputs to recover, not a new job. Admission is not delivery: poll skavio_agent_job_status, retrieve through skavio_agent_job_result, and verify SHA256. No anonymous execution.

Input Schema

Name	Required	Description	Default
`arguments`	Yes	Tool-specific structured input object. Supply the required named fields described by its JSON Schema; source bytes must respect encoded size limits. Never include wallet private keys, passwords or API tokens.
`payment_mode`	No	x402 returns a workload-specific quote; prepaid spends your existing shared company credits. No anonymous execution.	x402
`idempotency_key`	Yes	Stable job key; retry exactly the same inputs and payment mode with this key to recover safely.

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 27, 2026

addedInput schema / properties / arguments / description

Added value: +"Tool-specific structured input object. Supply the required named fields described by its JSON Schema; source bytes must respect encoded size limits. Never include wallet private keys, passwords or API tokens."

Changed8 schema fields changedOct 20, 2026

removedInput schema / properties / arguments / allOf

Removed value: -[
-  {
-    "if": {
-      "required": [
-        "url"
-      ]
-    },
-    "then": {
-      "not": {
-        "anyOf": [
-          {
-            "required": [
-              "max_results"
-            ]
-          }
-        ]
-      }
-    }
-  }
-]

removedInput schema / properties / arguments / not

Removed value: -{
-  "required": [
-    "url",
-    "query"
-  ]
-}

removedInput schema / properties / arguments / oneOf

Removed value: -[
-  {
-    "required": [
-      "url"
-    ]
-  },
-  {
-    "required": [
-      "query"
-    ]
-  }
-]

removedInput schema / properties / arguments / properties / diagnose

Removed value: -{
-  "default": false,
-  "description": "Optional DeepSeek interpretation, priced separately; a provider failure never loses the primary result.",
-  "type": "boolean"
-}

removedInput schema / properties / arguments / properties / max_results

Removed value: -{
-  "default": 5,
-  "description": "Search results to return in query mode.",
-  "maximum": 10,
-  "minimum": 1,
-  "type": "integer"
-}

removedInput schema / properties / arguments / properties / query

Removed value: -{
-  "description": "Google query answered by Serper; returns real source URLs, never synthesised links. Mutually exclusive with url.",
-  "maxLength": 256,
-  "minLength": 1,
-  "type": "string"
-}

changedInput schema / properties / arguments / properties / url / description

Previous value: -"Public HTTPS page to process. Mutually exclusive with query."New value: +"Public HTTPS page URL. Robots, public address and bounded response checks apply."

addedInput schema / properties / arguments / required
```
Added value: +[
+  "url"
+]
```

Changed8 schema fields changedOct 18, 2026

addedInput schema / properties / arguments / allOf

Added value: +[
+  {
+    "if": {
+      "required": [
+        "url"
+      ]
+    },
+    "then": {
+      "not": {
+        "anyOf": [
+          {
+            "required": [
+              "max_results"
+            ]
+          }
+        ]
+      }
+    }
+  }
+]

addedInput schema / properties / arguments / not

Added value: +{
+  "required": [
+    "url",
+    "query"
+  ]
+}

addedInput schema / properties / arguments / oneOf

Added value: +[
+  {
+    "required": [
+      "url"
+    ]
+  },
+  {
+    "required": [
+      "query"
+    ]
+  }
+]

addedInput schema / properties / arguments / properties / diagnose

Added value: +{
+  "default": false,
+  "description": "Optional DeepSeek interpretation, priced separately; a provider failure never loses the primary result.",
+  "type": "boolean"
+}

addedInput schema / properties / arguments / properties / max_results

Added value: +{
+  "default": 5,
+  "description": "Search results to return in query mode.",
+  "maximum": 10,
+  "minimum": 1,
+  "type": "integer"
+}

addedInput schema / properties / arguments / properties / query

Added value: +{
+  "description": "Google query answered by Serper; returns real source URLs, never synthesised links. Mutually exclusive with url.",
+  "maxLength": 256,
+  "minLength": 1,
+  "type": "string"
+}

changedInput schema / properties / arguments / properties / url / description

Previous value: -"Public HTTPS page URL. Robots, public address and bounded response checks apply."New value: +"Public HTTPS page to process. Mutually exclusive with query."

removedInput schema / properties / arguments / required
```
Removed value: -[
-  "url"
-]
```

Changed9 schema fields changedOct 17, 2026

changedInput schema / properties / arguments / additionalProperties
```
Previous value: -trueNew value: +false
```

addedInput schema / properties / arguments / properties

Added value: +{
+  "url": {
+    "description": "Public HTTPS page URL. Robots, public address and bounded response checks apply.",
+    "maxLength": 2048,
+    "type": "string"
+  }
+}

addedInput schema / properties / arguments / required
```
Added value: +[
+  "url"
+]
```
removedInput schema / properties / arguments / title
```
Removed value: -"Arguments"
```

addedInput schema / properties / idempotency_key / description

Added value: +"Stable job key; retry exactly the same inputs and payment mode with this key to recover safely."

addedInput schema / properties / idempotency_key / maxLength
```
Added value: +128
```
addedInput schema / properties / idempotency_key / minLength
```
Added value: +8
```
addedInput schema / properties / idempotency_key / pattern
```
Added value: +"^[A-Za-z0-9_.:-]{8,128}$"
```

addedInput schema / properties / payment_mode / description

Added value: +"x402 returns a workload-specific quote; prepaid spends your existing shared company credits. No anonymous execution."

AddedOct 14, 2026

TDQS

A4.7/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Goes well beyond annotations: describes the authenticated relay, Bearer API key requirement, enabled-backend precondition, payment modes (x402 quote vs prepaid shared credits), and that 'admission is not delivery' with polling and SHA256 verification. This is consistent with openWorldHint=true, idempotentHint=true (retry with the SAME idempotency_key), and non-readOnly behavior (it spends credits and creates a job).

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Front-loaded with purpose and sibling routing, then the auth/payment and lifecycle facts. Dense and jargon-heavy ('x402', 'SSRF', 'admission is not delivery'), but nearly every sentence carries decision-relevant information; only the payment-mode sentence partly duplicates the schema.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema exists, and the description still covers the full lifecycle: job creation, polling via skavio_agent_job_status, retrieval via skavio_agent_job_result, and integrity verification. It stops short of describing the shape or size of the returned content, which is a minor but real gap for a fetching tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema already defines url, payment_mode and idempotency_key with enum and pattern. The description adds operational meaning the schema only gestures at: that x402 yields a workload-specific quote, prepaid consumes shared credits, and recovery requires reusing the same key with identical inputs rather than starting a new job.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Retrieve content from a public HTTPS document') plus the constraint envelope (robots.txt, SSRF, byte limits). It then explicitly separates itself from web_extract (human-visible text) and web_monitor (change hashes), so an agent can route without opening schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Names both alternatives and the exact condition that selects each ('choose web_extract when only human-visible text is needed', 'web_monitor for content change hashes'). It also states the admission/retrieval path and the retry rule, leaving no inference needed.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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Web fetch

Input Schema

Schema Changelog

TDQS

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