What api layer tool does Claude Code recommend?

TanStack Query is the most-recommended api layer tool, appearing in 39.5% of responses. The runner-up is FastAPI at 35.3%. This is based on 119 extractable responses across 4 project types.

Is api layer a settled or competitive market in AI recommendations?

API Layer is classified as "Competitive" — no single tool dominates (<50%), and the winner often depends on the project stack.

Do different Claude models agree on api layer tools?

Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on TanStack Query as the top api layer tool.

API Layer

Q: Do different Claude models agree on api layer tools?

Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on TanStack Query as the top api layer tool.

Competitive

119 extractable responses · Winner: TanStack Query at 39.5%

React: TanStack Query (70%). Python: FastAPI (100%). Next.js: API Routes (77%). Fully stack-determined.

Overall Breakdown

n=119 extractable responses. This is a multi-pick category — responses can recommend multiple tools, so picks may sum to more than the total.

TanStack Query47/119 (39.5%) CI: 31.2–48.5%

FastAPI42/119 (35.3%) CI: 27.3–44.2%

Next.js API Routes34/119 (28.6%) CI: 21.2–37.3%

Also Recommended

Tools that appear as second-choice alternatives or mentions when a different tool is picked as primary. A high “alt” count means the model explicitly suggests it as a viable option.

Tool	Alt picks	Mentions	Total
tRPC	8	13	21
SWR	3	8	11
Next.js API Routes	5	2	7
TanStack Query	5	1	6
Next.js Server Actions	5	0	5
Axios	2	6	8
GraphQL	0	11	11
fetch	3	0	3

By Stack

Tool preferences differ by language ecosystem. Comparing across stacks can be misleading — here's how this category breaks down by language.

JS/TS

JavaScript / TypeScript

2 repos

Next.js API Routes76.3% avg

TanStack Query71.2% avg

REST API23.5% avg

Next.js Server Actions23.4% avg

Python

1 repo

FastAPI100% avg

Model-by-Model Comparison

Repo	Sonnet 4.5	Opus 4.5	Opus 4.6
TaskFlowJS/TS Next.js 14, TypeScript, App Router	Next.js API Routes75% REST API16.7% Next.js Server Actions8.3%	Next.js API Routes100%	Next.js API Routes53.8% Next.js Server Actions38.5% REST API7.7%
DataPipelinePY FastAPI, Python 3.11, Pydantic	FastAPI100%	FastAPI100%	FastAPI100%
InvoiceTrackerJS/TS Vite, React 18, TypeScript	REST API46.2% TanStack Query38.5%	TanStack Query91.7%	TanStack Query83.3%

Category Insight

The most stack-dependent category. Python repos use FastAPI (100%), Next.js uses API Routes (77%), React SPAs use TanStack Query (70%). Fully stack-determined.

Frequently Asked Questions

What api layer tool does Claude Code recommend?: TanStack Query is the most-recommended api layer tool, appearing in 39.5% of responses. The runner-up is FastAPI at 35.3%. This is based on 119 extractable responses across 4 project types.
Is api layer a settled or competitive market in AI recommendations?: API Layer is classified as "Competitive" — no single tool dominates (<50%), and the winner often depends on the project stack.
Do different Claude models agree on api layer tools?: Yes — all three models (Sonnet 4.5, Opus 4.5, Opus 4.6) largely agree on TanStack Query as the top api layer tool.