Monitor target

monitor_target Register an exact public destination URL for recurring health checks. Duplicates within a project are reused. Each completed check uses one unit of the shared monthly check allowance.

Hosted MCP registration verified. These schemas describe the development contract; confirm supported inputs with tools/list. Generic CLI/HTTP calls require a matching development server. Configure LINKTRAIL_API_URL; production does not expose these command routes.

Access	Behavior
`watches:write`	Writes or admits work

Checks and monitoring can consume workspace capacity. Queued admission is not a completed observation; inspect the returned job or saved state.

Example request

Connect through MCP, CLI, or HTTP. Replace example identifiers with records from your workspace.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "monitor_target",
    "arguments": {
      "projectId": "project_example",
      "url": "https://example.com/guide"
    }
  }
}

linktrail call monitor_target --args '{"projectId":"project_example","url":"https://example.com/guide"}'

curl "$LINKTRAIL_API_URL/v1/commands/monitor_target" \
  -H "Authorization: Bearer $LINKTRAIL_API_KEY" \
  -H 'Content-Type: application/json' \
  --data '{"projectId":"project_example","url":"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 this data in structuredContent and in a text content block; generic HTTP and CLI return the JSON result directly.

{
  "workspace_id": "ws_example",
  "project_id": "project_example",
  "status": "active",
  "cadence_seconds": 86400,
  "state": "unknown",
  "observation_state": {},
  "created_at": "2026-09-13T12:00:00.000Z",
  "updated_at": "2026-09-13T12:00:00.000Z",
  "last_attempt_at": null,
  "last_success_at": null,
  "last_observation_id": null,
  "next_check_at": "2026-09-13T12:00:00.000Z",
  "overdue_reason": null,
  "id": "target_example",
  "url": "https://example.com/guide",
  "created": true
}

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
`projectId`	string	Required	Identifier of the project returned by its create or list operation. minLength: 1; maxLength: 200
`url`	string	Required	Public HTTPS endpoint or destination URL required by this operation. format: “uri”
`cadenceSeconds`	integer	Optional	Scheduled check interval in seconds, from 3600 to 2592000. minimum: 3600; maximum: 2592000; default: 86400

Validation and omitted values

A normalized destination already registered in this project is reused without replacing its settings. A new destination is due immediately. Destination health checks consume allowance separately from source checks.

Defaults when omitted

Field	Default
`cadenceSeconds`	`86400`

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
`id`	string	Required	Resource identifier returned by the operation.
`workspace_id`	string	Required	Workspace that owns this record.
`project_id`	string	Required	Project that owns this record.
`status`	string	Required	Resource lifecycle status. values: “active”, “paused”
`cadence_seconds`	number	Required	cadence seconds recorded for this result.
`state`	string	Required	Saved lifecycle or evidence state, as enumerated for this record.
`observation_state`	object	Required	Saved observation state. Before the first check, this object can be empty.
`observation_state.state`	string	Optional	Saved lifecycle or evidence state, as enumerated for this record.
`observation_state.uncertain`	boolean	Optional	uncertain recorded for this result.
`observation_state.checked_at`	string	Optional	UTC timestamp of the saved check.
`observation_state.lastChangedAt`	string / null	Optional	last Changed At recorded for this result.
`observation_state.firstAbsentAt`	string / null	Optional	first Absent At recorded for this result.
`observation_state.consecutiveAbsent`	number	Optional	consecutive Absent recorded for this result.
`observation_state.nextCheckAt`	string / null	Optional	next Check At recorded for this result.
`observation_state.reason`	string / null	Optional	Recorded explanation; null when no explanation applies.
`observation_state.latestAttempt`	object / null	Optional	latest Attempt recorded for this result.
`observation_state.latestAttempt.state`	string	Optional	Saved lifecycle or evidence state, as enumerated for this record.
`observation_state.latestAttempt.reason`	string / null	Optional	Recorded explanation; null when no explanation applies.
`observation_state.latestAttempt.checkedAt`	string	Optional	checked At recorded for this result.
`observation_state.latestAttempt.httpStatus`	number / null	Optional	http Status recorded for this result.
`observation_state.latestAttempt.occurrenceCount`	number	Optional	occurrence Count recorded for this result.
`observation_state.latestAttempt.occurrences`	array	Optional	occurrences recorded for this result.
`observation_state.latestAttempt.occurrences[].href`	string / null	Optional	href recorded for this result.
`observation_state.latestAttempt.occurrences[].targetUrl`	string / null	Optional	target Url recorded for this result.
`observation_state.latestAttempt.occurrences[].anchor`	string / null	Optional	anchor recorded for this result.
`observation_state.latestAttempt.occurrences[].rel`	array	Optional	rel recorded for this result.
`observation_state.latestAttempt.occurrences[].context`	string / null	Optional	context recorded for this result.
`observation_state.latestAttempt.occurrences[].locator`	object / null	Optional	locator recorded for this result.
`observation_state.latestAttempt.occurrences[].locator.line`	number / null	Optional	line recorded for this result.
`observation_state.latestAttempt.occurrences[].locator.column`	number / null	Optional	column recorded for this result.
`observation_state.latestAttempt.occurrences[].locator.offset`	number / null	Optional	offset recorded for this result.
`observation_state.latestAttempt.checkerVersion`	string	Optional	checker Version recorded for this result.
`observation_state.lastSuccessfulObservation`	object / null	Optional	last Successful Observation recorded for this result.
`observation_state.lastSuccessfulObservation.state`	string	Optional	Saved lifecycle or evidence state, as enumerated for this record.
`observation_state.lastSuccessfulObservation.reason`	string / null	Optional	Recorded explanation; null when no explanation applies.
`observation_state.lastSuccessfulObservation.checkedAt`	string	Optional	checked At recorded for this result.
`observation_state.lastSuccessfulObservation.httpStatus`	number / null	Optional	http Status recorded for this result.
`observation_state.lastSuccessfulObservation.occurrenceCount`	number	Optional	occurrence Count recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences`	array	Optional	occurrences recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].href`	string / null	Optional	href recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].targetUrl`	string / null	Optional	target Url recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].anchor`	string / null	Optional	anchor recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].rel`	array	Optional	rel recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].context`	string / null	Optional	context recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].locator`	object / null	Optional	locator recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].locator.line`	number / null	Optional	line recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].locator.column`	number / null	Optional	column recorded for this result.
`observation_state.lastSuccessfulObservation.occurrences[].locator.offset`	number / null	Optional	offset recorded for this result.
`observation_state.lastSuccessfulObservation.checkerVersion`	string	Optional	checker Version recorded for this result.
`observation_state.lastSuccessfulObservationSameAsLatestAttempt`	boolean	Optional	last Successful Observation Same As Latest Attempt recorded for this result.
`observation_state.confirmedState`	string / null	Optional	confirmed State recorded for this result.
`observation_state.lastSuccessfulAt`	string / null	Optional	last Successful At recorded for this result.
`observation_state.lastHealthyAt`	string / null	Optional	last Healthy At recorded for this result.
`observation_state.firstUnavailableAt`	string / null	Optional	first Unavailable At recorded for this result.
`observation_state.unavailableCount`	number	Optional	unavailable Count recorded for this result.
`observation_state.wasEverHealthy`	boolean	Optional	was Ever Healthy recorded for this result.
`observation_state.retryNotBefore`	string / null	Optional	retry Not Before recorded for this result.
`observation_state.ignored`	boolean	Optional	ignored recorded for this result.
`created_at`	string	Required	UTC timestamp when the record was created.
`updated_at`	string	Required	UTC timestamp of the last record update.
`last_attempt_at`	string / null	Required	last attempt at recorded for this result.
`last_success_at`	string / null	Required	last success at recorded for this result.
`last_observation_id`	string / null	Required	last observation id recorded for this result.
`next_check_at`	string / null	Required	next check at recorded for this result.
`overdue_reason`	string / null	Required	overdue reason recorded for this result.
`url`	string	Required	url recorded for this result.
`created`	boolean	Optional	True when this request created the record; false when an existing record was reused.
`last_successful_observation_id`	string / null	Optional	last successful observation id 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

These existing resource routes share the operation’s domain behavior. Their parameter placement, status and response envelope can differ from generic invocation. See HTTP route details.

Method and route	Success	Details
`POST /v1/targets`	201	Remaining arguments go in a JSON object body.

Continue

request_target_check · get_target 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

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