AIsa On-Page Audit

OnPage API Waterfall

post_dataforseo_on_page_waterfall

Destructive

‌‌ This endpoint is designed to provide you with the page speed insights. Using this function you can get detailed information about the page loading time, time to secure connection, the time it takes to load page resources, and so on.

Usage-based billing; Default request estimate: $0.012 USD (not a fixed price). Account-specific pricing and final settlement may differ.

Input Schema

Name	Required	Description	Default
`body`	No

Output Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 19, 2026

changedInput schema / properties / body / items / oneOf

Previous value: -[
-  {
-    "example": [
-      {
-        "id": "08101204-0696-0216-0000-644a7b21a48a",
-        "url": "https://dataforseo.com/tag/broken-links"
-      }
-    ],
-    "properties": {
-      "id": {
-        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
-        "type": "string"
-      },
-      "tag": {
-        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "url": {
-        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
-        "type": "string"
-      }
-    },
-    "type": "object"
-  }
-]New value: +[
+  {
+    "properties": {
+      "id": {
+        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
+        "type": "string"
+      },
+      "tag": {
+        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "url": {
+        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  }
+]

Changed2 schema fields changedOct 16, 2026

removedInput schema / properties / body / items / anyOf

Removed value: -[
-  {
-    "example": [
-      {
-        "id": "08101204-0696-0216-0000-644a7b21a48a",
-        "url": "https://dataforseo.com/tag/broken-links"
-      }
-    ],
-    "properties": {
-      "id": {
-        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
-        "type": "string"
-      },
-      "tag": {
-        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "url": {
-        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
-        "type": "string"
-      }
-    },
-    "type": "object"
-  }
-]

addedInput schema / properties / body / items / oneOf

Added value: +[
+  {
+    "example": [
+      {
+        "id": "08101204-0696-0216-0000-644a7b21a48a",
+        "url": "https://dataforseo.com/tag/broken-links"
+      }
+    ],
+    "properties": {
+      "id": {
+        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
+        "type": "string"
+      },
+      "tag": {
+        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "url": {
+        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  }
+]

Changed7 schema fields changedOct 15, 2026

addedInput schema / properties / body / example

Added value: +[
+  {
+    "id": "08101204-0696-0216-0000-644a7b21a48a",
+    "url": "https://dataforseo.com/tag/broken-links"
+  }
+]

addedInput schema / properties / body / items / anyOf

Added value: +[
+  {
+    "example": [
+      {
+        "id": "08101204-0696-0216-0000-644a7b21a48a",
+        "url": "https://dataforseo.com/tag/broken-links"
+      }
+    ],
+    "properties": {
+      "id": {
+        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
+        "type": "string"
+      },
+      "tag": {
+        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "url": {
+        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  }
+]

removedInput schema / properties / body / items / properties

Removed value: -{
-  "id": {
-    "description": "ID of the task required field you can get this ID in the response of the Task POST endpoint example: “07131248-1535-0216-1000-17384017ad04”",
-    "type": "string"
-  },
-  "tag": {
-    "description": "user-defined task identifier optional field the character limit is 255 you can use this parameter to identify the task and match it with the result you will find the specified tag value in the data object of the response",
-    "type": "string"
-  },
-  "url": {
-    "description": "page URL required field specify the pages you want to receive timing for",
-    "type": "string"
-  }
-}

removedInput schema / properties / body / items / required
```
Removed value: -[
-  "id",
-  "url"
-]
```

changedInput schema / properties / body / items / type

Previous value: -"object"New value: +[
+  "object",
+  "null"
+]

changedInput schema / required

Previous value: -[
-  "body"
-]New value: +[]

addedOutput schema / x-fastmcp-wrap-result
```
Added value: +true
```

Changed7 schema fields changedOct 15, 2026

removedInput schema / properties / body / example

Removed value: -[
-  {
-    "id": "08101204-0696-0216-0000-644a7b21a48a",
-    "url": "https://dataforseo.com/tag/broken-links"
-  }
-]

removedInput schema / properties / body / items / anyOf

Removed value: -[
-  {
-    "example": [
-      {
-        "id": "08101204-0696-0216-0000-644a7b21a48a",
-        "url": "https://dataforseo.com/tag/broken-links"
-      }
-    ],
-    "properties": {
-      "id": {
-        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
-        "type": "string"
-      },
-      "tag": {
-        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "url": {
-        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
-        "type": "string"
-      }
-    },
-    "type": "object"
-  }
-]

addedInput schema / properties / body / items / properties

Added value: +{
+  "id": {
+    "description": "ID of the task required field you can get this ID in the response of the Task POST endpoint example: “07131248-1535-0216-1000-17384017ad04”",
+    "type": "string"
+  },
+  "tag": {
+    "description": "user-defined task identifier optional field the character limit is 255 you can use this parameter to identify the task and match it with the result you will find the specified tag value in the data object of the response",
+    "type": "string"
+  },
+  "url": {
+    "description": "page URL required field specify the pages you want to receive timing for",
+    "type": "string"
+  }
+}

addedInput schema / properties / body / items / required
```
Added value: +[
+  "id",
+  "url"
+]
```

changedInput schema / properties / body / items / type

Previous value: -[
-  "object",
-  "null"
-]New value: +"object"

changedInput schema / required

Previous value: -[]New value: +[
+  "body"
+]

removedOutput schema / x-fastmcp-wrap-result
```
Removed value: -true
```

Changed7 schema fields changedOct 15, 2026

addedInput schema / properties / body / example

Added value: +[
+  {
+    "id": "08101204-0696-0216-0000-644a7b21a48a",
+    "url": "https://dataforseo.com/tag/broken-links"
+  }
+]

addedInput schema / properties / body / items / anyOf

Added value: +[
+  {
+    "example": [
+      {
+        "id": "08101204-0696-0216-0000-644a7b21a48a",
+        "url": "https://dataforseo.com/tag/broken-links"
+      }
+    ],
+    "properties": {
+      "id": {
+        "description": "<em>ID of the task</em><br><strong>required field</strong><br>you can get this ID in the response of the <a href=\"/v3/on_page/task_post/\">Task POST</a> endpoint<br>example:<br>\"07131248-1535-0216-1000-17384017ad04\"",
+        "type": "string"
+      },
+      "tag": {
+        "description": "<em>user-defined task identifier</em><br>optional field<br><em>the character limit is 255</em><br>you can use this parameter to identify the task and match it with the result<br>you will find the specified <code>tag</code> value in the <code>data</code> object of the response",
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "url": {
+        "description": "<em>page URL</em><br><strong>required field</strong><br>specify the pages you want to receive timing for",
+        "type": "string"
+      }
+    },
+    "type": "object"
+  }
+]

removedInput schema / properties / body / items / properties

Removed value: -{
-  "id": {
-    "description": "ID of the task required field you can get this ID in the response of the Task POST endpoint example: “07131248-1535-0216-1000-17384017ad04”",
-    "type": "string"
-  },
-  "tag": {
-    "description": "user-defined task identifier optional field the character limit is 255 you can use this parameter to identify the task and match it with the result you will find the specified tag value in the data object of the response",
-    "type": "string"
-  },
-  "url": {
-    "description": "page URL required field specify the pages you want to receive timing for",
-    "type": "string"
-  }
-}

removedInput schema / properties / body / items / required
```
Removed value: -[
-  "id",
-  "url"
-]
```

changedInput schema / properties / body / items / type

Previous value: -"object"New value: +[
+  "object",
+  "null"
+]

changedInput schema / required

Previous value: -[
-  "body"
-]New value: +[]

addedOutput schema / x-fastmcp-wrap-result
```
Added value: +true
```

First observedSep 15, 2026

TDQS

C2.8/5.0

Behavior3/5

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

Annotations already declare destructiveHint=true, readOnlyHint=false, openWorldHint=true and idempotentHint=false, so the safety profile is largely carried by structured data. The description adds one genuinely new piece of behavioral context – usage-based billing at roughly $0.012 per request – which explains why a 'provide insights' call is flagged as non-read-only. It does not, however, explain the destructive flag, rate limits, or auth requirements, so the added value is moderate.

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

Conciseness3/5

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

The description is short and front-loaded, but the opening is padded ('This endpoint is designed to provide you with') and closes with vague filler ('and so on'). The pricing block is well-delimited and useful, but the prose itself could be tightened.

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

Completeness2/5

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

An output schema exists so return values need not be described, but for a POST task-style endpoint with a nested oneOf body array and a destructive annotation, the description omits the task-ID prerequisite, the meaning of the body payload, and any routing against the many sibling OnPage tools. It is not complete enough for confident invocation.

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

Parameters2/5

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

Schema description coverage is reported as 0% at the top level: the single 'body' array parameter is entirely unexplained in the description, and no mention is made of the required id/url fields or the optional tag. With such low coverage the description should compensate, and it does not.

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

Purpose4/5

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

The description states a clear purpose – page-speed/timing insight for a URL – and enumerates the payload concretely (page loading time, time to secure connection, resource load times). It does not differentiate this 'waterfall' timing endpoint from siblings such as get_dataforseo_on_page_summary, post_dataforseo_on_page_resources, or the lighthouse endpoints, so the agent cannot tell from the text alone which OnPage tool to pick.

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

Usage Guidelines2/5

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

There is no when-to-use guidance, no alternatives named, and no prerequisites. Crucially, it never says the endpoint requires task IDs obtained from the Task POST endpoint, even though that is a hard operational dependency.

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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