Check a link for free

verify_link_free One free placement check with evidence and honest uncertainty. Supply a source page that should carry a link and the destination you care about; the source page is fetched once and the tool reports whether that page links to the destination in the HTML it served at that moment. Four states: success (link found, every occurrence with anchor and rel), valid-negative (a COMPLETE read contains no link; never a claim the link is gone), unknown (the web did not answer; never means the link was removed or lost), failed (the check never ran: invalid input, the anonymous daily limit, or service , never a verdict on the web). No account or any connection required. No browser rendering: a page that needs JavaScript to render returns unknown. Anonymous ceilings: 3 checks per UTC day per visitor, 1 concurrent, one page fetched per check, 15-minute result cache. Raw publisher HTML is never returned.

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 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

Illustrative data validated against the documented response schema. IDs and dates are examples, not a live account capture. 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 page URL containing the placement to inspect. minLength: 1; maxLength: 8192
`targetUrl`	string	Required	Public destination URL expected in the placement. 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.

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	requested url recorded for this result.
`inspected_url`	string / null	Required	inspected url recorded for this result.
`target_url`	string / null	Required	Destination URL recorded in this evidence.
`scope`	string	Required	scope recorded for this result.
`checked_at`	string	Required	UTC timestamp of the saved check.
`complete`	boolean	Required	complete recorded for this result.
`occurrences`	array	Required	occurrences recorded for this result.
`occurrences[].targetUrl`	string	Required	target Url recorded for this result.
`occurrences[].anchor`	string	Required	anchor recorded for this result.
`occurrences[].rel`	array	Required	rel recorded for this result.
`checker_version`	string / null	Required	checker version recorded for this result.
`uncertainty`	array	Required	uncertainty recorded for this result.
`failure`	string	Optional	failure recorded for this result. values: “invalid_input”, “budget”, “cooling”, “service”
`retry_at`	string	Optional	retry at recorded for this result.
`retry_after_seconds`	number	Optional	retry after seconds recorded for this result.
`result_id`	string	Optional	result id recorded for this result.
`permalink`	string / null	Optional	permalink recorded for this result.
`cached`	boolean	Optional	cached recorded for this result.

Download input schema · Download output schema

Errors and retries

This command is not annotated idempotent. After a timeout, inspect existing state before repeating a write. 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, inspect capability status, or return to the command index.

Overview

Cloud operations

Repository tools

HTTP and events

Example request

Returned result

Input fields

Validation and omitted values

Defaults when omitted

Output fields

Errors and retries

HTTP resource routes

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​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