n8n integration services

How an integration engagement runs

1. 01

   API review

   Documentation, auth, limits, webhooks.

   Output: Feasibility note

2. 02

   Field map

   What moves where, transformations.

   Output: Approved field map

3. 03

   Build

   Connections, logic, safeguards.

   Output: Test integration

4. 04

   Testing

   Real, duplicate and failure cases.

   Output: Test results

5. 05

   Handover

   Docs, exports, monitoring.

   Output: Handover pack

API review before quoting

Each API differs in authentication, rate limits, webhooks and data shapes. A provider that reviews the documentation of every system before quoting can spot problems early, such as missing endpoints or strict limits, and give a more reliable estimate.

Who does what

Warning signs

• Quotes before looking at the APIs

  Hidden limits appear later.

• No plan for duplicates

  Retries may create double records.

• Webhooks accepted unverified

  Anyone could send fake events.

• Credentials in the provider's accounts

  Access is hard to control or remove.

Test evidence

Ask to see tests that send the same event twice, a record with missing fields, a very large batch and a simulated outage of the target system. The results show how the integration behaves when things go wrong, which is when it matters. Ask too how long each test run took at realistic volume.

Example: an integration proposal

What you should receive

When APIs change

Apps update their APIs, deprecate endpoints and change authentication. Ask how the provider monitors for such changes, how quickly it responds when an integration breaks and what that support costs. Ask for a short change log whenever the integration is modified.

Security

Ask how webhook endpoints are protected, how credentials are stored and scoped, and whether sensitive fields are excluded from logs. The OWASP API Security Top 10 is a useful reference for common weaknesses. Ask too how access is removed if the engagement ends.

Briefing the provider

List the systems, what should flow between them and when, which system is the source of truth for each field, expected volumes and who should be alerted if something fails. Mention any planned changes to these systems in the coming months.

The field map

A field map lists every field that moves between systems, its source and target, any transformation such as date or currency formats, which system is the source of truth and what happens when the field is missing. It is the most useful document in an integration project, because it lets your team check the logic without reading the workflow, and it guides anyone who changes the integration later. Ask for it in writing and approve it before the build.

Choosing the pattern

Ask whether the provider proposes webhooks, polling or scheduled syncs, and why. Webhooks are immediate but need verification and duplicate handling; polling is simpler but can miss or repeat items between checks; scheduled syncs suit batches but delay data. The right choice depends on what each system supports and how quickly data is needed.

Volumes and limits

Tell the provider how many records move each day and at peak times. Volumes affect rate-limit handling, batching and hosting needs. An integration designed for a few records a day may fail when a large import arrives.

What the contract should cover

Scope of systems and flows, acceptance tests, ownership of workflows and credentials, data processing terms, support response times and handover if the arrangement ends.