Imported from jeremylongshore/tons-of-skills-marketplace (skills/.curated/hubspot-lifecycle-and-lists/SKILL.md). Install upstream with npx skills add jeremylongshore/tons-of-skills-marketplace --skill hubspot-lifecycle-and-lists. Copyright stays with the author (MIT).

HubSpot Lifecycle and Lists

Overview

Move contacts through the HubSpot funnel and maintain list integrity in a production system. This is not a setup walkthrough — it is the code your marketing-ops integration runs when a lifecycle stage update would silently regress a Customer back to Subscriber, when a dynamic list's criteria change orphans members who qualified last week, when a static list import references contacts that were deleted from the portal, when an external lead-scoring model creates a second source of truth that fights HubSpot's native scoring, when a list-membership webhook fires but your consumer returns 5xx and HubSpot never retries, and when an agency needs to mirror list membership across two portals that have no native sync API.

The six production failures this skill prevents:

1. Lifecycle stage regression — HubSpot's PATCH /crm/v3/objects/contacts/{id} will set lifecyclestage to any valid value regardless of direction. Setting a Customer back to Subscriber silently destroys funnel attribution, invalidates reporting, and corrupts revenue forecasting. The API returns 200 OK. There is no built-in guard.
2. Dynamic list criteria drift — editing a dynamic list's filter criteria does not immediately re-evaluate existing members against the new rules. Members who no longer qualify remain in the list until the nightly background refresh completes, creating a stale membership window of up to 24 hours that can trigger incorrect nurture emails or suppression failures.
3. Static list import orphans — contacts added to a static list via import or POST /contacts/v1/lists/{listId}/add remain list members even after the underlying contact record is hard-deleted from the CRM. These orphan IDs return errors on any subsequent contact-level API call and pollute downstream sync pipelines.
4. Lead scoring model disagreement — writing an external score to a custom contact property while HubSpot's native Lead Scoring tool computes its own score creates two competing signals. Sales works from the HubSpot Score field; marketing automation triggers on the custom property. The two scores diverge and nobody knows which one to trust.
5. List-membership webhook missed events — HubSpot's webhook system delivers contact.propertyChange events for lifecyclestage updates and list-membership changes via HTTP POST with no retry on 5xx responses. A single downstream outage during a bulk-import window can drop hundreds of membership events permanently with no dead-letter queue or re-delivery mechanism.
6. Cross-portal list sync — agencies managing multiple HubSpot portals (e.g., a staging portal mirroring a production portal, or two franchisee portals needing shared suppression lists) have no native API to sync list membership between portals. Manual export-import lags by hours and has no idempotency guarantee.

Prerequisites

• HubSpot account with a private app token scoped to:
  • crm.objects.contacts.read
  • crm.objects.contacts.write
  • crm.lists.read
  • crm.lists.write
  • crm.schemas.contacts.read (for lifecycle stage enumeration)
• Python 3.10+ or Node.js 18+ for implementation examples
• jq on PATH for shell-level inspection
• curl for API verification steps
• For webhook consumption: an HTTPS endpoint reachable by HubSpot's webhook delivery infrastructure
• For cross-portal sync: private app tokens for both portals stored in separate environment variables or a credential router (see hubspot-auth skill)

Store all tokens in a secret manager. Never put pat-na1-* values in source code or committed .env files.

Instructions

Build in this order. Each section neutralizes one production failure mode.

1. Lifecycle stage progression guard (neutralizes regression)

The lifecycle stage enum has a defined forward direction. Any update that moves a contact backward is almost certainly a data pipeline bug, not an intentional business action.

Canonical stage order (HubSpot internal values, not display labels):

subscriber → lead → marketingqualifiedlead → salesqualifiedlead → opportunity → customer → evangelist → other

other is a lateral bucket, not a terminal stage — it sits outside the linear progression and should only be set explicitly.

Never read the stage order from display labels. Display labels are portal-configurable. Always use the internal enum values.

Progression guard pattern (Python):

STAGE_ORDER = [
    "subscriber",
    "lead",
    "marketingqualifiedlead",
    "salesqualifiedlead",
    "opportunity",
    "customer",
    "evangelist",
]
# 'other' is not in the linear sequence — treat as a lateral assignment

def stage_index(stage: str) -> int:
    try:
        return STAGE_ORDER.index(stage.lower())
    except ValueError:
        return -1  # 'other' or unknown — always allow

def safe_set_lifecycle(contact_id: str, new_stage: str, token: str) -> dict:
    current = get_contact_lifecycle(contact_id, token)
    current_idx = stage_index(current)
    new_idx = stage_index(new_stage)

    # Allow lateral 'other' assignments and forward progressions
    if current_idx != -1 and new_idx != -1 and new_idx < current_idx:
        raise ValueError(
            f"Lifecycle regression blocked: {current} → {new_stage} "
            f"for contact {contact_id}. "
            f"Current index={current_idx}, requested index={new_idx}."
        )

    return patch_contact_lifecycle(contact_id, new_stage, token)

def get_contact_lifecycle(contact_id: str, token: str) -> str:
    import urllib.request, json
    url = f"https://api.hubapi.com/crm/v3/objects/contacts/{contact_id}?properties=lifecyclestage"
    req = urllib.request.Request(url, headers={"Authorization": f"Bearer {token}"})
    with urllib.request.urlopen(req) as resp:
        data = json.loads(resp.read())
    return data["properties"].get("lifecyclestage", "subscriber")

def patch_contact_lifecycle(contact_id: str, stage: str, token: str) -> dict:
    import urllib.request, json
    url = f"https://api.hubapi.com/crm/v3/objects/contacts/{contact_id}"
    payload = json.dumps({"properties": {"lifecyclestage": stage}}).encode()
    req = urllib.request.Request(
        url,
        data=payload,
        headers={
            "Authorization": f"Bearer {token}",
            "Content-Type": "application/json",
        },
        method="PATCH",
    )
    with urllib.request.urlopen(req) as resp:
        return json.loads(resp.read())

Verify a contact's current stage before running a bulk update:

curl -s \
  "https://api.hubapi.com/crm/v3/objects/contacts/{contact-id}?properties=lifecyclestage" \
  -H "Authorization: Bearer {your-token}" \
  | jq '.properties.lifecyclestage'

2. Dynamic list criteria drift (neutralizes stale membership)

When you edit a dynamic list's filter criteria, HubSpot queues a background re-evaluation job. Existing members who no longer satisfy the new criteria remain in the list until that job completes — up to 24 hours. Any automation triggered on list membership during that window operates on stale data.

Production pattern: snapshot membership before and after a criteria change, then audit the delta.

import urllib.request, json, time

def snapshot_list_members(list_id: int, token: str) -> set[str]:
    """Return the full set of vid (legacy contact ID) strings for a list."""
    vids = set()
    offset = None
    while True:
        url = f"https://api.hubapi.com/contacts/v1/lists/{list_id}/contacts/all?count=100"
        if offset:
            url += f"&vidOffset={offset}"
        req = urllib.request.Request(url, headers={"Authorization": f"Bearer {token}"})
        with urllib.request.urlopen(req) as resp:
            data = json.loads(resp.read())
        for contact in data.get("contacts", []):
            vids.add(str(contact["vid"]))
        if not data.get("has-more", False):
            break
        offset = data["vid-offset"]
    return vids

def audit_criteria_drift(list_id: int, token: str, poll_interval_s: int = 3600):
    """
    Take a pre-criteria-change snapshot, wait for the nightly refresh window,
    take a post snapshot, and report contacts that should have been removed.
    Call this before editing criteria and again after the refresh window.
    """
    before = snapshot_list_members(list_id, token)
    print(f"Pre-change member count: {len(before)}")
    print(f"Snapshot saved. Re-run after {poll_interval_s}s (or after nightly refresh).")
    return before

Shell verification of list metadata:

curl -s \
  "https://api.hubapi.com/contacts/v1/lists/{list-id}" \
  -H "Authorization: Bearer {your-token}" \
  | jq '{listId, name, listType, updatedAt, metaData}'

Flag the list as DYNAMIC in your internal registry and mark it "refresh-pending" whenever criteria change. Suppress automation triggers until a post-refresh snapshot confirms membership is stable.

3. Static list orphan detection (neutralizes orphan IDs)

A static list retains member IDs after the underlying contact record is hard-deleted. Batch-processing that list later will hit 404 on every orphaned ID, burning API quota and producing false error telemetry.

Orphan sweep pattern (key logic):

def find_orphaned_members(list_id: int, token: str, batch_size: int = 100) -> list[str]:
    """Return vids in the list whose contact records no longer exist."""
    all_vids = list(snapshot_list_members(list_id, token))
    orphans = []
    for i in range(0, len(all_vids), batch_size):
        batch = all_vids[i : i + batch_size]
        payload = json.dumps({
            "inputs": [{"id": vid} for vid in batch],
            "properties": ["lifecyclestage"],
        }).encode()
        # POST /crm/v3/objects/contacts/batch/read
        # Any VIDs absent from results[] are orphaned
        result = batch_read_contacts(payload, token)
        found_ids = {str(r["id"]) for r in result.get("results", [])}
        orphans.extend(v for v in batch if v not in found_ids)
    return orphans

Full batch_read_contacts + remove_orphans_from_static_list implementations: implementation-guide.md § Static List Batch Membership Manager.

Schedule this sweep weekly and before any bulk send that reads the static list.

4. Lead scoring source-of-truth resolution (neutralizes scoring conflict)

If HubSpot's native Lead Scoring tool is active on a portal, it writes to the system-managed hs_lead_status and hubspotscore properties. Writing an external score to hubspotscore directly is blocked — HubSpot rejects the PATCH with a 400. Writing to a custom property (e.g., external_lead_score) creates a second source of truth that sales and marketing will each discover separately and use inconsistently.

Resolution pattern — pick one authority and route everything through it:

Option A (HubSpot is authority): disable or remove the HubSpot native scoring ruleset, write the external score to hubspotscore via the API, and document the source in the portal's settings notes.

Option B (external model is authority): disable native HubSpot scoring, write the external score to a single custom property (external_lead_score), and update every automation and workflow filter to reference that property instead of hubspotscore. Write a clear comment in every HubSpot workflow that hubspotscore is not used.

Option C (both must coexist): keep both, but surface the discrepancy to the rep via a third computed field:

def write_external_score(contact_id: str, score: int, token: str):
    """
    Write external score to a custom property. Never write to hubspotscore
    if HubSpot native scoring is active — the PATCH will be rejected.
    """
    payload = json.dumps({"properties": {"external_lead_score": str(score)}}).encode()
    req = urllib.request.Request(
        f"https://api.hubapi.com/crm/v3/objects/contacts/{contact_id}",
        data=payload,
        headers={
            "Authorization": f"Bearer {token}",
            "Content-Type": "application/json",
        },
        method="PATCH",
    )
    with urllib.request.urlopen(req) as resp:
        return json.loads(resp.read())

Document the scoring authority in a pinned internal wiki page. Ambiguity here compounds over time.

5. Webhook missed-event recovery (neutralizes delivery gaps)

HubSpot delivers contact.propertyChange events (for lifecyclestage) and list-membership events via HTTP POST to your registered endpoint. If your consumer returns a 5xx, HubSpot does not retry. There is no dead-letter queue, no re-delivery, no backfill API. The event is permanently lost.

Three-layer defense:

Layer 1 — Fast consumer with async processing. Accept the POST, validate the signature, write the raw payload to a durable queue (Redis, SQS, Postgres events table), return 200 immediately. Never do downstream processing inside the HTTP handler — any exception there causes a 5xx and the event is lost.

Layer 2 — Idempotent event processor. Use the HubSpot eventId as an idempotency key before processing:

PROCESSED_EVENT_IDS = set()  # replace with Redis SET or DB unique constraint

def process_event(event: dict):
    event_id = event.get("eventId")
    if event_id in PROCESSED_EVENT_IDS:
        return  # duplicate delivery — skip
    PROCESSED_EVENT_IDS.add(event_id)
    # downstream logic here — never inside the HTTP handler

Layer 3 — Reconciliation sweep. Every 6 hours, compare local cached lifecycle stages to the HubSpot REST API. Divergence = missed webhook.

Full HTTP handler with SQLite durable store, v3 signature validation, processor thread, and reconciliation loop: implementation-guide.md § List-Membership Webhook Handler with Idempotency.

6. Cross-portal list sync (neutralizes agency-sync gap)

There is no HubSpot API endpoint for "sync list A in portal X to list B in portal Y." The workaround is a two-leg pull-and-push:

1. Paginate GET /contacts/v1/lists/{sourceListId}/contacts/all?property=email from the source portal to collect all member emails.
2. Resolve each email to a contact VID in the destination portal via GET /contacts/v1/contact/email/{email}/profile. Contacts with no matching email in the destination are unresolvable — log and skip, do not fail the sync.
3. Write resolved VIDs to the destination static list via POST /contacts/v1/lists/{destListId}/add in batches of 100.

Key constraint: the destination list must be STATIC — dynamic lists reject direct membership writes.

Full implementation with dry-run mode, unresolvable reporting, and rate-limit delays: implementation-guide.md § Cross-Portal List Sync.

Schedule this sync as a nightly job. For suppression lists, run it before every campaign send, not on a calendar cadence.

Error Handling

Examples

Set a contact's lifecycle stage forward

curl -s -X PATCH \
  "https://api.hubapi.com/crm/v3/objects/contacts/{contact-id}" \
  -H "Authorization: Bearer {your-token}" \
  -H "Content-Type: application/json" \
  -d '{"properties": {"lifecyclestage": "salesqualifiedlead"}}' \
  | jq '{id, properties: {lifecyclestage: .properties.lifecyclestage}}'

Search for all Customers

curl -s -X POST \
  "https://api.hubapi.com/crm/v3/objects/contacts/search" \
  -H "Authorization: Bearer {your-token}" \
  -H "Content-Type: application/json" \
  -d '{
    "filterGroups": [{"filters": [{"propertyName": "lifecyclestage", "operator": "EQ", "value": "customer"}]}],
    "properties": ["email", "lifecyclestage", "hs_lead_status"],
    "limit": 100
  }' \
  | jq '{total, results: [.results[] | {id, email: .properties.email, stage: .properties.lifecyclestage}]}'

Create a static list

curl -s -X POST \
  "https://api.hubapi.com/contacts/v1/lists" \
  -H "Authorization: Bearer {your-token}" \
  -H "Content-Type: application/json" \
  -d '{"name": "2026-Q2 Campaign — Suppression", "dynamic": false}' \
  | jq '{listId, name, listType}'

Add contacts to a static list

curl -s -X POST \
  "https://api.hubapi.com/contacts/v1/lists/{list-id}/add" \
  -H "Authorization: Bearer {your-token}" \
  -H "Content-Type: application/json" \
  -d '{"vids": [12345, 67890, 11223]}' \
  | jq '{updated, discarded}'

List all lists for a portal

curl -s \
  "https://api.hubapi.com/contacts/v1/lists/all/lists/static?count=250" \
  -H "Authorization: Bearer {your-token}" \
  | jq '[.lists[] | {listId, name, updatedAt, metaData: {size: .metaData.size}}]'

Run a lifecycle stage bulk update with progression guard

python3 - <<'EOF'
import os, json
# Load the progression-guard code from implementation-guide.md
# Then run a dry-run report before committing changes
contacts = [
    {"id": "12345", "target_stage": "marketingqualifiedlead"},
    {"id": "67890", "target_stage": "customer"},
]
token = os.environ["HUBSPOT_ACCESS_TOKEN"]
for c in contacts:
    try:
        result = safe_set_lifecycle(c["id"], c["target_stage"], token)
        print(f"Updated {c['id']} → {c['target_stage']}")
    except ValueError as e:
        print(f"BLOCKED: {e}")
EOF

Output

• Lifecycle stage progression guard that blocks regressions before the API call is made
• Dynamic list criteria drift audit with pre/post membership snapshots
• Static list orphan sweep that identifies and removes deleted-contact VIDs
• Lead scoring single-source-of-truth decision record (option A/B/C documented)
• Webhook consumer with durable queue intake, signature validation, and idempotency key deduplication
• Reconciliation sweep comparing local state to HubSpot REST API for divergence detection
• Cross-portal list sync with email-based contact resolution and unresolvable contact reporting

Resources

• HubSpot CRM Contacts API v3
• Contacts Lists API v1
• Lifecycle Stage Property Reference
• HubSpot Webhooks Documentation
• Webhook Signature Validation
• CRM Search API
• Batch Contact Operations
• Lead Scoring in HubSpot
• API_REFERENCE.md — lifecycle stage enum, list API endpoint shapes, webhook event schemas, filter syntax
• implementation-guide.md — lifecycle progression guard, dynamic list criteria builder, static list batch management, webhook handler with idempotency