Google Programmable Search Engine (Custom Search JSON API) vs Kagi Search API

Google Programmable Search Engine (Custom Search JSON API) and Kagi Search API are both Web Search APIs, compared here on pricing, compliance, capabilities, and developer experience from structured, cited data - not reviews or paid placement. Google Programmable Search Engine (Custom Search JSON API) offers a free tier while Kagi Search API does not, so Google Programmable Search Engine (Custom Search JSON API) is easier to trial before committing. Kagi Search API supports self-serve signup; the other routes through a sales conversation. On compliance, Kagi Search API additionally documents GDPR. For coding-agent use, Kagi Search API scores higher on agent-friendliness (40 vs 20).

Comparedby a transparent data-readiness score computed from each API's published, sourced fields. No reviews, no paid placement. How we rank.

Data last verified 2026-06-14, with every field cited on each profile.

Head-to-head, from published, cited fields (auto-generated; no paid placement)
Field	Google Programmable Search Engine (Custom Search JSON API)	Kagi Search API
Starting price	$5 1,000 queries	$12 1,000 searches
Pricing model	Usage	Usage
Free tier	✓	✗
Self-serve signup	✗	✓
SOC 2	·	-
HIPAA	·	✗
GDPR	·	✓
Webhooks	✗	✗
Sandbox	✗	✗
Documented actions	3	10

Full data and citations: Google Programmable Search Engine (Custom Search JSON API) · Kagi Search API. See more Web Search APIs.