Request API documentation, SDKs, rate limits, and versioning policies. Confirm whether webhooks support idempotency, signed payloads, and replay for missed events. Explore extension points: custom actions, middleware hooks, and scripting options with guardrails. Ask how they handle schema evolution without breaking flows. A vendor willing to build or prioritize a connector for your critical system—and commit a delivery date in writing—signals partnership, not just platform capability. Insist on hands‑on tests, not hypothetical promises.
Assess how the vendor handles messy, real‑world records: duplicate customers, conflicting addresses, or inconsistent product codes. Look for mapping tools, validation rules, and bulk operations with clear rollback. Request a migration plan including sampling strategy, reconciliation reports, and sign‑off checkpoints. A small pilot migration, using anonymized but representative data, can expose assumptions early. Continuous data cleansing and ownership rules will matter long after go‑live, protecting insights, compliance, and downstream automations from creeping entropy.
Confirm SSO options such as SAML or OAuth, role‑based access controls, and least‑privilege defaults. Evaluate how automations run under service accounts, audit their actions, and separate duties to prevent conflicts. Ask whether provisioning is automated via SCIM, and how offboarding revokes tokens immediately. When identity design is robust, audits move faster, onboarding becomes smoother, and accidental privilege escalation diminishes. This foundation protects customer data, satisfies auditors, and reduces midnight firefighting from misconfigured credentials.
Request current SOC 2 Type II report with management assertion and auditor letter, not just a bridge. Confirm ISO 27001 certificate validity and scope. Ask for penetration testing summaries, vulnerability management SLAs, and remediation timelines. Clarify subprocessor lists and contractual flow‑down requirements. Real transparency includes redactions with context, auditor names, and dates. Vendors confident in controls welcome a controlled review under NDA, enabling you to assess alignment with your own risk register and policies.
Explore the architecture diagram: multi‑tenant isolation, encryption specifics, and secrets management. Verify TLS configuration, cipher choices, and certificate rotation practices. Understand how data is segmented per customer, how logs are stored, and whether sensitive fields are masked in support tools. Ask about client‑side protections, mobile hardening, and secure update pipelines. Effective design minimizes blast radius, accelerates forensics, and reduces regulatory exposure when incidents occur, preserving revenue and reputation during unexpected stress.
Quantify resilience: uptime SLA, RPO, RTO, and regional failover capabilities. Review backup frequency, integrity checks, and restore drills with evidence of timing results. Demand clear communication channels for incidents, including status pages, postmortems, and named escalation contacts. A vendor that practices game‑day scenarios and publishes learnings reduces your downstream outage costs. Contractual remedies matter, but honest, fast coordination matters more when operations pause and your customers are waiting for answers.
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