TL;DR — Google's Custom Search JSON API (CSE / Programmable Search) returns Google results for a custom-scoped search engine, capped at a low daily volume and priced per thousand queries. ODEN returns a synthesized answer plus citations for LLMs, with no daily cap of that kind. Choose CSE if you want Google results over sites you control; choose ODEN if you want an answer a model can use, at API scale.
The Custom Search JSON API was built to add site search to a website, scoped to a set of sites you configure. People stretch it into a general web-search backend for LLMs, where its caps and shape start to bite. ODEN is built for the LLM case from the start.
At a glance#
| ODEN | Google Custom Search (CSE) | |
|---|---|---|
| Output | Synthesized answer + ranked citations | Google results as JSON (links + snippets) |
| Reads and distills sources | Yes | No |
| Scope | Open web | Sites configured in your programmable engine |
| Daily volume | Governed by monthly quota, no hard daily cap of that kind | 10,000 queries/day maximum |
| Built for | LLM context / RAG / agents | Site search / custom-scoped search |
| Hosting | EU (Cloudflare, Sweden) | Global (Google) |
| robots.txt + EU TDM opt-out at source | Yes | N/A |
| Pricing model | Flat monthly quota + never-expiring top-ups | Free daily allowance, then per 1,000 queries, hard daily cap |
Where Google CSE is ahead#
If you want Google's ranking over a defined set of sites — a documentation portal, a set of trusted domains, your own properties — CSE does exactly that, and the results carry Google's quality. For site search and custom-scoped lookups, it is a solid, cheap choice with a generous free daily allowance for small volumes.
Where ODEN is ahead#
CSE returns links and snippets, is capped at 10,000 queries a day, and is oriented around a configured engine rather than the open web. For an LLM that needs the live web at API scale and a ready answer, that shape fights you: you hit the daily cap, and you still have to fetch and extract. ODEN returns the answer plus citations directly, scales with your quota rather than a daily ceiling, and is EU-hosted with source-level compliance.
Pricing head-to-head#
ODEN: Free 1,000/month, Pro €29/month for 6,000, top-ups €7/1,000, never expiring. See pricing.
Google CSE gives a free daily allowance and then charges per 1,000 queries up to a hard daily cap; check Google's current pricing. The daily cap, not just the price, is often the deciding constraint for API workloads.
When to choose which#
- Choose Google CSE if you want Google results over sites you control, at modest volume.
- Choose ODEN if you want a synthesized answer for an LLM, open-web scope, no low daily cap, and EU hosting.
FAQ#
What is the Google Custom Search daily limit?#
The JSON API is capped at 10,000 queries per day, with a free daily allowance before per-thousand pricing applies. For steady API workloads that cap is often the binding constraint. ODEN scales with your monthly quota instead.
Can Google CSE search the whole web?#
It is designed to search a programmable engine scoped to sites you configure; whole-web search is possible but not its purpose. ODEN searches the open web by default.
Does CSE return an answer for my LLM?#
No — it returns Google results as JSON. You build the answer yourself. ODEN returns the answer and citations in one call.