Verify discovery candidate

verify_discovery_candidate Request an asynchronous check of one saved discovery candidate. Returns a verification record and queued job with immutable lineage. Requires an idempotency key; consumes check allowance when executed. Does not establish a verified result synchronously.

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
`discovery:read`, `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": "verify_discovery_candidate",
    "arguments": {
      "runId": "run_example",
      "candidateId": "dc_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "idempotencyKey": "docs-request-001"
    }
  }
}

linktrail call verify_discovery_candidate --args '{"runId":"run_example","candidateId":"dc_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","idempotencyKey":"docs-request-001"}'

curl "$LINKTRAIL_API_URL/v1/commands/verify_discovery_candidate" \
  -H "Authorization: Bearer $LINKTRAIL_API_KEY" \
  -H 'Content-Type: application/json' \
  --data '{"runId":"run_example","candidateId":"dc_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa","idempotencyKey":"docs-request-001"}'

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.

{
  "schema_version": 1,
  "workspace_id": "ws_example",
  "project_id": "pr_example",
  "run_id": "run_example",
  "candidate_id": "dc_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
  "watch_id": "watch_example",
  "job_id": "job_example",
  "local_reference": null,
  "created_at": "2026-09-13T12:00:00.000Z",
  "candidate": {
    "v": 1,
    "id": "dc_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
    "workspace_id": "ws_example",
    "project_id": "pr_example",
    "discovery_run_id": "run_example",
    "source_url": "https://publisher.example.org/article",
    "target_url": "https://example.com/",
    "provider": "linktrail_corpus",
    "data_mode": "owned_corpus",
    "provider_retrieved_at": "2026-09-13T12:00:00.000Z",
    "provider_first_seen": "2026-09-13T12:00:00.000Z",
    "provider_prev_seen": null,
    "provider_last_seen": "2026-09-13T12:00:00.000Z",
    "provider_status": {
      "is_lost": null,
      "is_broken": null,
      "is_new": null
    },
    "anchor": "Example",
    "rel": [],
    "dofollow": true,
    "link_type": "anchor",
    "source_http_status": 200,
    "target_http_status": null,
    "links_count": 1,
    "provider_metrics": {
      "linktrail_corpus": {
        "source_outlink_count": 1,
        "source_external_outlink_count": 1,
        "fetch_kind": "direct",
        "extraction_complete": true
      }
    },
    "verification_status": "not_checked",
    "verified_at": null,
    "observation_id": null
  },
  "job": {
    "id": "job_example",
    "state": "queued",
    "execution_mode": "candidate_once",
    "error_code": null,
    "created_at": "2026-09-13T12:00:00.000Z",
    "completed_at": null,
    "usage": {
      "unit": "source_check",
      "units": 1,
      "state": "reserved",
      "period": "2026-09"
    }
  },
  "observation": null,
  "watch": {
    "id": "watch_example",
    "status": "paused",
    "local_reference": null
  },
  "recurring_monitoring_created": false,
  "replayed": 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
`runId`	string	Required	Identifier of the run returned by its create or list operation. pattern: ”^[a-zA-Z0-9_-]{1,128}$“
`candidateId`	string	Required	Identifier of the candidate returned by its create or list operation. pattern: “^dc_[a-f0-9]{64}$“
`localReference`	string	Optional	Customer-owned reference to associate this record with a local ledger entry. minLength: 1; maxLength: 200
`idempotencyKey`	string	Required	Caller-generated key reused only for retries of the same operation and arguments in this workspace. pattern: ”^[\x21-\x7e]{1,200}$“

Validation and omitted values

Omitted localReference remains null. The candidate must belong to the supplied saved run. Admission returns a queued job, not verified presence.

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
`schema_version`	number	Required	schema version recorded for this result. must equal 1
`workspace_id`	string	Required	Workspace that owns this record.
`project_id`	string	Required	Project that owns this record.
`run_id`	string	Required	run id recorded for this result.
`candidate_id`	string	Required	candidate id recorded for this result.
`watch_id`	string	Required	watch id recorded for this result.
`job_id`	string	Required	job id recorded for this result.
`local_reference`	string / null	Required	Customer reference for joining this record to a local ledger entry.
`created_at`	string	Required	UTC timestamp when the record was created.
`candidate`	object	Required	candidate recorded for this result.
`candidate.v`	number	Required	v recorded for this result. must equal 1
`candidate.id`	string	Required	Resource identifier returned by the operation. pattern: “^dc_[a-f0-9]{64}$“
`candidate.workspace_id`	string	Required	Workspace that owns this record. minLength: 1; maxLength: 128; pattern: ”^[a-zA-Z0-9_-]+$“
`candidate.project_id`	string	Required	Project that owns this record. minLength: 1; maxLength: 128; pattern: ”^[a-zA-Z0-9_-]+$“
`candidate.discovery_run_id`	string	Required	discovery run id recorded for this result. minLength: 1; maxLength: 128; pattern: ”^[a-zA-Z0-9_-]+$“
`candidate.source_url`	string	Required	Publisher page URL recorded in this evidence. maxLength: 4096
`candidate.target_url`	string	Required	Destination URL recorded in this evidence. maxLength: 4096
`candidate.provider`	string	Required	provider recorded for this result. values: “linktrail_corpus”, “dataforseo”, “imported”
`candidate.data_mode`	string	Required	data mode recorded for this result. values: “synthetic”, “owned_corpus”, “provider_index”, “imported”
`candidate.provider_retrieved_at`	string	Required	Timestamp when the upstream evidence was retrieved. format: “date-time”; pattern: ”^(?:(?:\d\d[2468][048]\|\d\d[13579][26]\|\d\d0[48]\|[02468][048]00\|[13579][26]00)-02-29\|\d{4}-(?:(?:0[13578]\|1[02])-(?:0[1-9]\|[12]\d\|3[01])\|(?:0[469]\|11)-(?:0[1-9]\|[12]\d\|30)\|(?:02)-(?:0[1-9]\|1\d\|2[0-8])))T(?:(?:[01]\d\|2[0-3]):[0-5]\d:[0-5]\d\.\d{3}(?:Z))$“
`candidate.provider_first_seen`	string / null	Required	provider first seen recorded for this result.
`candidate.provider_prev_seen`	string / null	Required	provider prev seen recorded for this result.
`candidate.provider_last_seen`	string / null	Required	provider last seen recorded for this result.
`candidate.provider_status`	object	Required	provider status recorded for this result. additional fields rejected
`candidate.provider_status.is_lost`	boolean / null	Required	is lost recorded for this result.
`candidate.provider_status.is_broken`	boolean / null	Required	is broken recorded for this result.
`candidate.provider_status.is_new`	boolean / null	Required	is new recorded for this result.
`candidate.anchor`	string / null	Required	anchor recorded for this result.
`candidate.rel`	array / null	Required	rel recorded for this result.
`candidate.dofollow`	boolean / null	Required	dofollow recorded for this result.
`candidate.link_type`	string / null	Required	link type recorded for this result.
`candidate.source_http_status`	integer / null	Required	source http status recorded for this result.
`candidate.target_http_status`	integer / null	Required	target http status recorded for this result.
`candidate.links_count`	integer / null	Required	links count recorded for this result.
`candidate.provider_metrics`	object / object / object	Required	provider metrics recorded for this result.
`candidate.provider_metrics.dataforseo`	object	Required	dataforseo recorded for this result. additional fields rejected
`candidate.provider_metrics.dataforseo.rank`	integer / null	Required	rank recorded for this result.
`candidate.provider_metrics.dataforseo.page_from_rank`	integer / null	Required	page from rank recorded for this result.
`candidate.provider_metrics.dataforseo.domain_from_rank`	integer / null	Required	domain from rank recorded for this result.
`candidate.provider_metrics.dataforseo.backlink_spam_score`	integer / null	Required	backlink spam score recorded for this result.
`candidate.provider_metrics.dataforseo.rank_scale`	string	Required	rank scale recorded for this result. must equal “one_thousand”
`candidate.provider_metrics.imported`	object	Required	imported recorded for this result. additional fields rejected
`candidate.provider_metrics.imported.supplier`	string	Required	supplier recorded for this result. values: “ahrefs”, “google_search_console”, “semrush”, “majestic”, “moz”, “dataforseo”, “linkody”, “csv”
`candidate.provider_metrics.imported.supplier_row_id`	string / null	Required	supplier row id recorded for this result.
`candidate.provider_metrics.imported.supplier_generated_at`	string / null	Required	supplier generated at recorded for this result.
`candidate.provider_metrics.imported.supplier_metrics`	object / null	Required	supplier metrics recorded for this result.
`candidate.provider_metrics.linktrail_corpus`	object	Required	linktrail corpus recorded for this result. additional fields rejected
`candidate.provider_metrics.linktrail_corpus.source_outlink_count`	integer / null	Required	source outlink count recorded for this result.
`candidate.provider_metrics.linktrail_corpus.source_external_outlink_count`	integer / null	Required	source external outlink count recorded for this result.
`candidate.provider_metrics.linktrail_corpus.fetch_kind`	string	Required	fetch kind recorded for this result. values: “direct”, “rendered”, “proxied”
`candidate.provider_metrics.linktrail_corpus.extraction_complete`	boolean	Required	extraction complete recorded for this result.
`candidate.verification_status`	string	Required	Linktrail check state, independent of supplier flags. not_checked means no Linktrail check is recorded. values: “not_checked”, “present”, “absent”, “unknown”, “source_unavailable”
`candidate.verified_at`	string / null	Required	Timestamp of the Linktrail check; null until checked.
`candidate.observation_id`	string / null	Required	observation id recorded for this result.
`job`	object	Required	job recorded for this result.
`job.id`	string	Required	Resource identifier returned by the operation.
`job.state`	string	Required	Saved lifecycle or evidence state, as enumerated for this record.
`job.execution_mode`	string	Required	execution mode recorded for this result.
`job.error_code`	string / null	Required	error code recorded for this result.
`job.created_at`	string	Required	UTC timestamp when the record was created.
`job.completed_at`	string / null	Required	completed at recorded for this result.
`job.usage`	object	Required	usage recorded for this result.
`job.usage.unit`	string	Required	unit recorded for this result. must equal “source_check”
`job.usage.units`	number	Optional	units recorded for this result.
`job.usage.state`	string	Optional	Saved lifecycle or evidence state, as enumerated for this record.
`job.usage.period`	string	Optional	period recorded for this result.
`observation`	object / null	Required	observation recorded for this result.
`observation.id`	string	Required	Resource identifier returned by the operation.
`observation.state`	string	Required	Saved lifecycle or evidence state, as enumerated for this record.
`observation.reason`	string / null	Required	Recorded explanation; null when no explanation applies.
`observation.checked_at`	string	Required	UTC timestamp of the saved check.
`watch`	object	Required	watch recorded for this result.
`watch.id`	string	Required	Resource identifier returned by the operation.
`watch.status`	string	Required	Resource lifecycle status.
`watch.local_reference`	string / null	Required	Customer reference for joining this record to a local ledger entry.
`recurring_monitoring_created`	boolean	Required	Whether this operation enrolled recurring monitoring. must equal false
`replayed`	boolean	Optional	True when the response reuses an earlier request with the same idempotency value.

Download input schema · Download output schema

Errors and retries

The command is annotated idempotent. Reuse an accepted idempotency key when the input provides one; changing the payload under a reused key can conflict. 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/discovery/runs/{runId}/candidates/{candidateId}/verify`	202	Remaining arguments go in a JSON object body. Supply idempotencyKey as the Idempotency-Key header on this resource route.

Continue

get_candidate_verification Follow the related workflow, inspect capability status, or return to the command index.

Overview

Cloud operations

Repository tools

HTTP and events

Verify discovery candidate

Example request

Returned result

Input fields

Validation and omitted values

Output fields

Errors and retries

HTTP resource routes

Continue

​Example request

​Returned result

​Input fields

​Validation and omitted values

​Output fields

​Errors and retries

​HTTP resource routes

​Continue

Example request

Returned result

Input fields

Validation and omitted values

Output fields

Errors and retries

HTTP resource routes

Continue