Complete Guide to Semantic Search APIs

Everything about semantic search APIs for AI applications.

1 min readLuca Moretti

Semantic search understands meaning, not just keywords.

API Comparison

Provider

Price/1K

Quality

Keiro

$0.30

Excellent

Exa

$6.13

Good

Tavily

$8.00

Good

Keiro Example

import requests

response = requests.post(
    "https://kierolabs.space/api/search-pro",
    headers={
        "Content-Type": "application/json",
        "Authorization": "Bearer YOUR_API_KEY"
    },
    json={
        "query": "quantum computing"
    },
    timeout=10
)

data = response.json()
print(data)

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Luca Moretti
Luca Moretti
Senior Engineer · 34 articles

Senior engineer on the Keiro core team. Writes about search infrastructure, latency optimization, and cost-efficient API design. Worked with Cloudflare Workers and Go at scale.

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Updated March 25, 2026

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