I'm building a data pipeline, should I use REST or GraphQL APIs?

For a data pipeline, the default choice is usually REST, unless you have a strong reason to need GraphQL.

Quick recommendation

• Use REST if you want:

  • simpler implementation
  • easier paging/retries
  • more predictable performance
  • better compatibility with ETL/ELT tools
  • easier caching and observability

• Use GraphQL if you need:

  • highly flexible, client-driven field selection
  • many nested related objects in one request
  • you’re integrating with an API that only offers GraphQL
  • you can invest in query cost controls and schema-aware extraction logic

Why REST is often better for pipelines

Data pipelines usually care about:

• pulling large volumes
• doing it reliably and repeatedly
• handling incremental loads
• minimizing surprises in pagination, rate limits, and response size

REST tends to be a better fit because:

• endpoints are usually easier to reason about
• pagination patterns are often clearer
• incremental sync with updated_at, since, cursor paging, etc. is common
• debugging failed jobs is easier
• tooling support is broader

Why GraphQL can be trickier

GraphQL gives flexibility, but for pipelines that can become a downside:

• queries can get complex quickly
• pagination is less standardized across APIs
• nested queries can be expensive and harder to throttle
• response shapes can vary based on query, which complicates schemas
• you need to watch for query depth, cost, and server-side limits

Best practical rule

If you control the API design:

• Expose REST for pipeline extraction
• Consider GraphQL only for interactive app clients

If you’re consuming an existing API:

• use whatever the provider supports best
• if both are available, pick REST for bulk extraction unless GraphQL clearly reduces the number of calls without introducing complexity

A simple decision test

Choose REST if most of these are true:

• you need scheduled bulk pulls
• data is fairly tabular
• you need robust incremental sync
• you want simpler retries and monitoring

Choose GraphQL if most of these are true:

• you need many related entities in one round trip
• response payload customization matters a lot
• the API is GraphQL-first and well documented for extraction
• you can handle custom pagination and rate-limit logic

Bottom line

For most data pipelines: REST is the safer, simpler choice.
Use GraphQL when its flexibility gives a real extraction advantage that outweighs the added complexity.

If you want, I can also give you a decision matrix for REST vs GraphQL specifically for:

1. ETL/ELT pipelines
2. real-time ingestion
3. third-party SaaS APIs