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Data Integration|30 September 2026

How to safely let third‑party apps access your CRM: a small‑team checklist

An afternoon-ready checklist to vet, configure and monitor third‑party apps that need CRM access for small UK teams.

1. Scope and prepare (30–60 minutes)

Write down exactly what the app needs to do and what data it must read or write. Treat each permission as a risk: can the feature work with read-only access, a subset of fields, or a single webhook instead of full API access?

Create a named integration account (or private app) and a short runbook that records who approved access, the vendor contact, and expiry/rotation dates. If you want help aligning fields or permissions in Fareham, see CRM & marketing data optimisation (Fareham).

Platform note: prefer a dedicated integration user rather than reusing a human account — HubSpot supports Private Apps/OAuth scopes, and in Salesforce use a connected app + a named integration user with a narrow profile.

2. Lock down access and data (a focused checklist)

  • Give minimum scopes: restrict to only the objects and fields needed; deny delete or export unless strictly required.
  • Create test or sandbox records and tag them (integration_source=test) so automations ignore them.
  • Add lightweight provenance fields (integration_source, integration_id, integration_last_synced) so later you can filter, audit, or rollback records.
  • Pause or gate automations that would act on integration writes — use a 'do_not_automate' flag or a conditional check until testing completes.
  • Check consent and compliance: confirm vendor DPA, data subprocessors, location of hosting (UK/EU preferred), and that marketing opt-ins are respected for any email contacts.

Quick platform hints: HubSpot scopes are granular — only grant the contact/CRM scopes you need; in Marketo/Pardot and Salesforce favour an integration user with a dedicated permission set rather than broad admin rights.

3. Test, monitor and a simple revoke/incident plan (30–90 minutes)

Run a short smoke test: use the named integration to create, update and (where allowed) read a test record; verify provenance fields, that no unexpected fields changed, and that automations stayed paused. Keep a short checklist of three smoke assertions (create, update, no automation trigger) and tick them each time a vendor changes the integration.

Set basic monitoring: a daily automated delta export (or a saved CRM list) showing records changed by the integration, and a simple alert if changes exceed a small threshold. Prepare a one‑page revoke plan: who pauses the integration, who rotates credentials, how to restore a snapshot, and who notifies customers if personal data is affected.

If you'd rather hand this to someone local, Optira can run the afternoon checklist with your team and leave you a concise runbook and revoke plan.

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