Check a link for free

verify_link_free Check one supplied source page for a link to your target, without an account.

Anonymous hosted check. No account required.

Access	Behavior
Anonymous	Writes or admits work

The anonymous allowance is three checks per UTC day per visitor, one concurrent check and a fifteen-minute result cache. This inline result does not create a workspace, queued job or recurring monitor.

Example request

Use the anonymous MCP endpoint at /free/mcp or HTTP /free/check.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "verify_link_free",
    "arguments": {
      "sourceUrl": "https://publisher.example.com/resources",
      "targetUrl": "https://example.com/guide"
    }
  }
}

curl --fail-with-body https://app.agentlinkops.com/free/check \
  -H 'Content-Type: application/json' \
  --data '{"sourceUrl":"https://publisher.example.com/resources","targetUrl":"https://example.com/guide"}'

Returned result

Schema-validated example; IDs and dates are illustrative. MCP returns structured data with a Markdown explanation. The HTTP result also establishes an anonymous visitor cookie.

{
  "state": "success",
  "reason": "link_found",
  "requested_url": "https://publisher.example.com/resources",
  "inspected_url": "https://publisher.example.com/resources",
  "target_url": "https://example.com/guide",
  "scope": "exact",
  "checked_at": "2026-09-13T12:00:00.000Z",
  "complete": true,
  "occurrences": [
    {
      "targetUrl": "https://example.com/guide",
      "anchor": "Example",
      "rel": []
    }
  ],
  "checker_version": "example-checker",
  "uncertainty": [
    "This page links to https://example.com/guide in the HTML it served at 2026-09-13T12:00:00.000Z.",
    "Static HTML observation: JavaScript execution and visual visibility were not checked.",
    "Nothing here says anything about indexing, ranking or traffic."
  ],
  "result_id": "fc_example",
  "permalink": null,
  "cached": false
}

Input fields

Omit optional fields when you do not want to supply them. Null is accepted only where listed. Unknown input properties are rejected.

Field	Type	Presence	Meaning and constraints
`sourceUrl`	string	Required	Public publisher URL. minLength: `1`; maxLength: `8192`
`targetUrl`	string	Required	Expected destination URL. minLength: `1`; maxLength: `8192`
`scope`	string	Optional	URL matching rule: exact URL, domain, subdomain, or path prefix. default: `"exact"`; values: `"exact"`, `"domain"`, `"subdomain"`, `"path"`

Validation and omitted values

This operation returns its result directly; it does not create a workspace job. Anonymous allowance is three checks per UTC day per visitor, one concurrent check, with a fifteen-minute result cache. The failed state means the check did not run. Unknown and valid-negative are evidence outcomes and do not establish confirmed loss.

Defaults when omitted

Field	Default
`scope`	`"exact"`

Output fields

Fields inside optional or nullable parents apply only when that parent exists. Common schema conventions explain evidence states, empty lists and extensions.

state (string, required): Saved lifecycle or evidence state, as enumerated for this record.
reason (string, required): Recorded explanation; null when no explanation applies.
requested_url (string / null, required).
inspected_url (string / null, required).
target_url (string / null, required): Destination URL recorded in this evidence.
scope (string, required).
checked_at (string, required): UTC timestamp of the saved check.
complete (boolean, required).
occurrences (array, required).
checker_version (string / null, required).
uncertainty (array, required).
failure (string, optional).
retry_at (string, optional).
retry_after_seconds (number, optional).
result_id (string, optional): Identifier returned by the related operation.
permalink (string / null, optional).
cached (boolean, optional).

All fields and nested objects

Types, allowed values, limits and nested fields:

Field	Type	Presence	Meaning and constraints
`state`	string	Required	Saved lifecycle or evidence state, as enumerated for this record. values: `"success"`, `"valid-negative"`, `"unknown"`, `"failed"`
`reason`	string	Required	Recorded explanation; null when no explanation applies.
`requested_url`	string / null	Required
`inspected_url`	string / null	Required
`target_url`	string / null	Required	Destination URL recorded in this evidence.
`scope`	string	Required
`checked_at`	string	Required	UTC timestamp of the saved check.
`complete`	boolean	Required
`occurrences`	array	Required
`occurrences[].targetUrl`	string	Required
`occurrences[].anchor`	string	Required
`occurrences[].rel`	array	Required
`checker_version`	string / null	Required
`uncertainty`	array	Required
`failure`	string	Optional	values: `"invalid_input"`, `"budget"`, `"cooling"`, `"service"`
`retry_at`	string	Optional
`retry_after_seconds`	number	Optional
`result_id`	string	Optional	Identifier returned by the related operation.
`permalink`	string / null	Optional
`cached`	boolean	Optional

Download input schema · Download output schema

Errors and retries

This write is not annotated idempotent. After a timeout, inspect existing state before repeating it. See error recovery for status, scope, cooldown, cursor and retry handling. Unknown observations are result data and do not establish loss.

HTTP resource routes

Use POST /free/check. HTTP also supports retrieving a cached anonymous result; see anonymous HTTP result retrieval.

Continue

Follow the related workflow. See capability status for availability or the command index for another operation.

Overview

MCP, CLI and API commands

CLI client

HTTP and events

Optional local workflows

Example request

Returned result

Input fields

Validation and omitted values

Defaults when omitted

Output fields

Errors and retries

HTTP resource routes

Continue

​Example request

​Returned result

​Input fields

​Validation and omitted values

​Defaults when omitted

​Output fields

​Errors and retries

​HTTP resource routes

​Continue

Example request

Returned result

Input fields

Validation and omitted values

Defaults when omitted

Output fields

Errors and retries

HTTP resource routes

Continue