Production APIs,
priced like infrastructure
Text-to-speech, speech-to-text and a universal SERP API, billed per character, second and search — up to 83% below list price. Free tier, no contract.
Text to Speech & Speech to Text API
Five AI audio tools behind one key — text to speech, transcription, sound effects, noise removal and voice changing. 10,000+ voices across 32 languages, from $0.023 per 1,000 characters.
- Text to speech
- Speech to text
- Sound effects
- Noise removal
Universal SERP API
AI Overviews, Knowledge Graph, sitelinks and People Also Ask — in one call, in SerpApi-compatible JSON. One key for Google, Bing, Maps, News, Shopping, Scholar and 40+ engines, from $0.0025 per search.
- AI Overviews
- Knowledge Graph
- 40+ engines, one key
- Drop-in for SerpApi
Pay for what you use, not for a tier
Dedicated API plans are sold in fixed blocks sized well above what most projects need. We meter the thing you actually consume — characters, seconds, searches — and bill that.
Up to 83% below list
Same data, same voices, a fraction of the price. Every comparison on this site is against a published list price we checked ourselves, with the source named.
One key, no new account
Both APIs authenticate with your RapidAPI key. Nothing else to sign up for, nothing to rotate, one bill for everything.
Metered, not per-request
A 5-character request should not cost what a 20,000-character one does. We bill per character, per second and per search — so small calls stay genuinely cheap.
Hard limits by default
Free and Pro plans refuse requests instead of billing overage. You cannot wake up to a surprise invoice on the plans most people start on.
Built for production
Automatic failover across a pooled backend, health checks and circuit breaking. Every response carries a request ID so a failure is one row in a log, not a guessing game.
Cancel any time
Month to month through RapidAPI. No annual commitment, no minimum spend, no sales call to get a number out of us.
What you would pay going direct
Our rate is the effective per-unit price of the Pro plan allowance. Competitor prices are list prices, checked on 9 August 2026.
Voice API
vs ElevenLabs & Deepgram
| What | Compared with | Their price | SmartAPIHub | Relative cost | You save |
|---|---|---|---|---|---|
| Text to speechper 1,000 characters | ElevenLabs Multilingual v2 | $0.10 | $0.0249 | −75% | |
| Text to speechper 1,000 characters | ElevenLabs Flash / Turbo | $0.05 | $0.0249 | −50% | |
| Speech to textper audio hour | ElevenLabs Scribe | $0.22 | $0.0998 | −55% | |
| Speech to textper audio hour | Deepgram Nova-3 | $0.462 | $0.0998 | −78% | |
| Sound effects & audioper minute | ElevenLabs | $0.12 | $0.0399 | −67% |
SERP API
vs a dedicated SERP plan
| Your volume | Smallest plan that covers it | Their price | SmartAPIHub | Relative cost | You save |
|---|---|---|---|---|---|
| 6,000 searchesper month | SerpApi Production — 15,000 | $150 | $25Pro | −83% | |
| 25,000 searchesper month | SerpApi Big Data — 30,000 | $275 | $80Ultra | −71% | |
| 70,000 searchesper month | SerpApi Searcher — 100,000 | $725 | $175Mega | −76% |
Common questions
How do I get an API key?
You subscribe on RapidAPI and the key is issued there. Every request is authenticated with your RapidAPI key, so there is no second account to open and no separate credential to rotate. The free tier on both APIs needs no credit card.
Is there really a free tier?
Yes, on both APIs and with no card required. The Voice API gives you 10,000 characters of speech, 17 minutes of transcription and 2.5 minutes of audio effects each month. The SERP API gives you 150 searches a month at full response depth — not a cut-down version.
What happens if I go over my plan?
On the free and Pro plans, nothing: they are hard-limited, so requests are refused rather than billed. Ultra and Mega allow overage at a published per-unit rate, so heavy months keep working. You are never charged for a failed or rejected request.
Can I cancel any time?
Yes. Billing is monthly through RapidAPI with no contract, no minimum and no annual commitment. Cancelling stops the next charge.
Why are you cheaper than going direct?
Two reasons. We buy capacity in volume and resell it in the small increments most projects actually need, and we meter what you consume — characters, seconds, searches — instead of selling fixed tiers sized well above your usage. A dedicated plan that covers 6,000 searches is sold as 15,000, and you pay for all of them.
Do you offer support?
Yes. Every response carries an X-Request-ID; quote it and a failure becomes one row in our logs rather than a guessing game. Reach us through the Contact Provider button on either RapidAPI listing, or at admin@smartapihub.com.
Start on the free tier
No credit card, no contract. Subscribe on RapidAPI and make your first call in under a minute.