Text Intelligence
Free tierSentiment, entities, summaries, and moderation in one call.
About this API
A language understanding endpoint covering sentiment and emotion, named-entity recognition, keyword extraction, abstractive summarization, language detection across 104 languages, and policy-grade content moderation.
Common use cases
Quickstart
Every Zephiel API uses the same base URL, the same key header, and the same error envelope.
curl -X GET "https://zephiel.com/api/v1/text-intelligence/sentiment" \
-H "X-Zephiel-Key: $ZEPHIEL_API_KEY" \
-H "Accept: application/json"Example response
{
"sentiment": { "label": "positive", "score": 0.91 },
"entities": [
{ "text": "Lagos", "type": "LOCATION", "confidence": 0.99 }
],
"language": "en"
}/v1/text-intelligence/sentimentDocument and aspect-level sentiment/v1/text-intelligence/entitiesNamed entities with linking/v1/text-intelligence/summarizeAbstractive or extractive summary/v1/text-intelligence/moderateMulti-category safety classificationAll endpoints return JSON and accept the X-Zephiel-Key header. Rate limits are enforced per plan and reported in X-RateLimit-Remaining.
Plans can be changed or cancelled at any time. Overage is charged per 1,000 requests rather than hard-blocking your traffic.
Free
100 requests/mo
5 req/min
Free
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — not included
- Email support — not included
- Usage analytics and alerts — not included
- 99.9% uptime SLA — not included
- Webhooks — not included
- Priority support — not included
- Custom rate limits — not included
- 99.99% uptime SLA — not included
- Dedicated success manager — not included
- SSO / SAML — not included
- Custom SLA, DPA, and BAA — not included
- Private deployment option — not included
- Volume pricing — not included
Starter
10,000 requests/mo
60 req/min
$22/month
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — included
- Email support — included
- Usage analytics and alerts — included
- 99.9% uptime SLA — included
- Webhooks — not included
- Priority support — not included
- Custom rate limits — not included
- 99.99% uptime SLA — not included
- Dedicated success manager — not included
- SSO / SAML — not included
- Custom SLA, DPA, and BAA — not included
- Private deployment option — not included
- Volume pricing — not included
Most popular
Pro
250,000 requests/mo
600 req/min
$88/month
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — included
- Email support — included
- Usage analytics and alerts — included
- 99.9% uptime SLA — included
- Webhooks — included
- Priority support — included
- Custom rate limits — included
- 99.99% uptime SLA — included
- Dedicated success manager — not included
- SSO / SAML — not included
- Custom SLA, DPA, and BAA — not included
- Private deployment option — not included
- Volume pricing — not included
Enterprise
Unlimited requests
Custom
$308/month
- JSON output format — included
- HTTPS encryption — included
- API key authentication — included
- Standard endpoints — included
- Community support — included
- CSV output format — included
- Email support — included
- Usage analytics and alerts — included
- 99.9% uptime SLA — included
- Webhooks — included
- Priority support — included
- Custom rate limits — included
- 99.99% uptime SLA — included
- Dedicated success manager — included
- SSO / SAML — included
- Custom SLA, DPA, and BAA — included
- Private deployment option — included
- Volume pricing — included
4.8
12 reviews
Yuki Tanaka
Backend Engineer
Free tier covered the whole prototype
I built the entire ugc moderation flow against Text Intelligence before anyone had to approve a purchase order. By the time we paid, we already knew it worked.
Grace Mwangi
Head of Product
Replaced a fragile in-house summarization job
We had a script doing newsroom summarization that broke every few months and only one person understood. Text Intelligence replaced it in an afternoon and nobody maintains it now.
Mei Chen
Integration Engineer
Errors are actually readable
When something goes wrong Text Intelligence says what and why, with a code I can branch on. I have integrated sentiment services that return 200 with an error buried in the body, so this is a relief.
Peter Osei
DevOps Lead
Held up under real load
We push Text Intelligence hard during peak and latency has stayed flat. No throttling surprises, no silent degradation — the numbers on the listing matched what we measured.
Rachel Kimani
Head of Integrations
Good coverage for moderation
We checked Text Intelligence against our own moderation reference data before committing. Coverage was better than the incumbent we were paying four times as much for.
Chidi Nwosu
Head of Engineering
Documentation matched reality
Every sample in the Text Intelligence docs ran unmodified. That sounds like a low bar until you have integrated something where it is not.
James O'Connor
Technical Director
Now handles support ticket triage too
We adopted Text Intelligence for review analysis and ended up using it for support ticket triage as well. Same key, no new contract, no second integration.
Aisha Suleiman
Digital Lead
Support answered properly
Asked Meridian AI about an edge case in Text Intelligence and got an explanation from someone who had clearly read the code, not a link to the FAQ.
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