Yes. The Free tier is 600 requests a month at 100 requests a minute, across every endpoint in the catalog, with no credit card. Nothing about it expires.

What happens when I hit the quota?

Requests return 429 with the limit, what you have used, and which window you tripped — nothing is queued, and nothing is charged. The monthly quota resets on the 1st (UTC). There is no rollover: unused requests do not carry into the next month.

Do failed requests use up my quota?

A 5xx does not. If a source breaks on our side, the request is excluded from your monthly count. A 4xx does count — a wrong parameter is still a request we answered. Per-minute throttling counts everything, so a retry loop is still throttled.

Which tier do I need?

Start on Free. Every response carries the remaining quota in its headers, and the dashboard reads the same number enforcement uses, so you will see the ceiling coming rather than discovering it.

How is Zapi different from RapidAPI or Apify?

Zapi focuses on a consistent REST contract — one API key, one response format, one error pattern for every source. No need to learn per-provider quirks like on traditional marketplaces, and no need to set up scraping workflows like on Apify.

What about the legality of accessing public data?

Zapi only accesses data that is publicly available without a login. Responsibility for how it is ultimately used stays with the developer — make sure your use case complies with the original source's ToS and the regulations in your operating region.

Is there an official SDK?

One: zpi-sdk, for TypeScript and JavaScript. It carries a typed error hierarchy, retries only what is safe to retry, submits bulk jobs, and verifies webhook signatures. Everything else is plain REST — cURL or any HTTP client works.

Can I request a source that isn't in the catalog yet?

Yes, through the community Discord, on any tier.

Why are Pro and Ultra marked Soon?

Checkout is not open yet. The limits and features listed on those tiers are already built and enforced — what is pending is billing, not the product.

Kokoro TTS

High-quality multilingual text-to-speech synthesis.

llms.txt

Synthesize

Generate speech audio from text input.

POST/v1/ai:kokoro-tts/synthesize5m cache3 paramschecking key…

Parameters

textstringrequired

text/plain

Text untuk di-convert ke speech. Optimal untuk teks English (US/UK accent). Max 2000 chars.

voiceenum

Voice ID (28 pilihan). Prefix = aksen+gender: af=American Female, am=American Male, bf=British Female, bm=British Male. American female: af_heart (flagship), af_bella, af_nicole, af_aoede, af_kore, af_sarah, af_nova, af_sky, af_alloy, af_jessica, af_river. American male: am_michael, am_fenrir, am_puck, am_echo, am_eric, am_liam, am_onyx, am_santa, am_adam. British female: bf_emma, bf_isabella, bf_alice, bf_lily. British male: bm_george, bm_fable, bm_lewis, bm_daniel. Default af_heart.

speednumber

Kecepatan bicara (multiplier). Range 0.5 (lambat) - 2.0 (cepat). Default 1.0.

Response

EXAMPLE

{
  "text": "Halo, perkenalkan saya Zapi AI. Senang berkenalan dengan Anda.",
  "audio": {
    "url": "https://remsky-kokoro-tts-zero.hf.space/gradio_api/file=/tmp/gradio/8178a9a13fceab0fd38262452af3118b8ca01d104ed3ae4fd6ba2bc8f115f81b/audio.wav",
    "mimeType": "audio/wav"
  },
  "speed": 1,
  "voice": "af_bella",
  "provider": "kokoro-tts"
}

Code

Synthesize

index.ts

// npm i zpi-sdk
import { ZpiClient } from "zpi-sdk";

const client = new ZpiClient({ apiKey: "zpi_xxxxxxxxxxxxxxxxxxxxxxxx" });

const data = await client.run("ai:kokoro-tts", "synthesize", {
  "text": "Hello! This is a short speech sample rendered in real time.",
  "voice": "af_heart",
  "speed": 1
});
console.log(data);

Recommended · typed errors, safe retries and bulk jobsSDK reference

Full reference

1 endpoint · plain text

POST

Synthesize/v1/ai:kokoro-tts/synthesize

3 params

Parameters

textstringrequiredin body: Text untuk di-convert ke speech. Optimal untuk teks English (US/UK accent). Max 2000 chars.
voiceenumoptionalin body: Voice ID (28 pilihan). Prefix = aksen+gender: af=American Female, am=American Male, bf=British Female, bm=British Male. American female: af_heart (flagship), af_bella, af_nicole, af_aoede, af_kore, af_sarah, af_nova, af_sky, af_alloy, af_jessica, af_river. American male: am_michael, am_fenrir, am_puck, am_echo, am_eric, am_liam, am_onyx, am_santa, am_adam. British female: bf_emma, bf_isabella, bf_alice, bf_lily. British male: bm_george, bm_fable, bm_lewis, bm_daniel. Default af_heart. Values: af_heart, af_bella, af_nicole, af_aoede, af_kore, af_sarah, af_nova, af_sky, af_alloy, af_jessica, af_river, af_jadzia, am_michael, am_fenrir, am_puck, am_echo, am_eric, am_liam, am_onyx, am_santa, am_adam, bf_emma, bf_isabella, bf_alice, bf_lily, bm_george, bm_fable, bm_lewis, bm_daniel.
speednumberoptionalin body: Kecepatan bicara (multiplier). Range 0.5 (lambat) - 2.0 (cepat). Default 1.0.

Request

curl -X POST "https://api.zapi.ink/v1/ai:kokoro-tts/synthesize" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "text": "Halo, perkenalkan saya Zapi AI. Senang berkenalan dengan Anda.",
  "audio": {
    "url": "https://remsky-kokoro-tts-zero.hf.space/gradio_api/file=/tmp/gradio/8178a9a13fceab0fd38262452af3118b8ca01d104ed3ae4fd6ba2bc8f115f81b/audio.wav",
    "mimeType": "audio/wav"
  },
  "speed": 1,
  "voice": "af_bella",
  "provider": "kokoro-tts"
}

Kokoro TTS

High-quality multilingual text-to-speech synthesis.

llms.txt

Synthesize

Generate speech audio from text input.

POST/v1/ai:kokoro-tts/synthesize5m cache3 paramschecking key…

Parameters

textstringrequired

text/plain

Text untuk di-convert ke speech. Optimal untuk teks English (US/UK accent). Max 2000 chars.

voiceenum

speednumber

Kecepatan bicara (multiplier). Range 0.5 (lambat) - 2.0 (cepat). Default 1.0.

Response

EXAMPLE

{
  "text": "Halo, perkenalkan saya Zapi AI. Senang berkenalan dengan Anda.",
  "audio": {
    "url": "https://remsky-kokoro-tts-zero.hf.space/gradio_api/file=/tmp/gradio/8178a9a13fceab0fd38262452af3118b8ca01d104ed3ae4fd6ba2bc8f115f81b/audio.wav",
    "mimeType": "audio/wav"
  },
  "speed": 1,
  "voice": "af_bella",
  "provider": "kokoro-tts"
}

Code

Synthesize

index.ts

// npm i zpi-sdk
import { ZpiClient } from "zpi-sdk";

const client = new ZpiClient({ apiKey: "zpi_xxxxxxxxxxxxxxxxxxxxxxxx" });

const data = await client.run("ai:kokoro-tts", "synthesize", {
  "text": "Hello! This is a short speech sample rendered in real time.",
  "voice": "af_heart",
  "speed": 1
});
console.log(data);

Recommended · typed errors, safe retries and bulk jobsSDK reference

Full reference

1 endpoint · plain text

POST

Synthesize/v1/ai:kokoro-tts/synthesize

3 params

Parameters

textstringrequiredin body: Text untuk di-convert ke speech. Optimal untuk teks English (US/UK accent). Max 2000 chars.
voiceenumoptionalin body: Voice ID (28 pilihan). Prefix = aksen+gender: af=American Female, am=American Male, bf=British Female, bm=British Male. American female: af_heart (flagship), af_bella, af_nicole, af_aoede, af_kore, af_sarah, af_nova, af_sky, af_alloy, af_jessica, af_river. American male: am_michael, am_fenrir, am_puck, am_echo, am_eric, am_liam, am_onyx, am_santa, am_adam. British female: bf_emma, bf_isabella, bf_alice, bf_lily. British male: bm_george, bm_fable, bm_lewis, bm_daniel. Default af_heart. Values: af_heart, af_bella, af_nicole, af_aoede, af_kore, af_sarah, af_nova, af_sky, af_alloy, af_jessica, af_river, af_jadzia, am_michael, am_fenrir, am_puck, am_echo, am_eric, am_liam, am_onyx, am_santa, am_adam, bf_emma, bf_isabella, bf_alice, bf_lily, bm_george, bm_fable, bm_lewis, bm_daniel.
speednumberoptionalin body: Kecepatan bicara (multiplier). Range 0.5 (lambat) - 2.0 (cepat). Default 1.0.

Request

curl -X POST "https://api.zapi.ink/v1/ai:kokoro-tts/synthesize" \
  -H "x-api-key: zpi_xxxxxxxxxxxxxxxxxxxxxxxx"

Example response

{
  "text": "Halo, perkenalkan saya Zapi AI. Senang berkenalan dengan Anda.",
  "audio": {
    "url": "https://remsky-kokoro-tts-zero.hf.space/gradio_api/file=/tmp/gradio/8178a9a13fceab0fd38262452af3118b8ca01d104ed3ae4fd6ba2bc8f115f81b/audio.wav",
    "mimeType": "audio/wav"
  },
  "speed": 1,
  "voice": "af_bella",
  "provider": "kokoro-tts"
}

Kokoro TTS

Synthesize

Code

Full reference

Parameters

Request

Example response

Copilot AI

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Kokoro TTS

Synthesize

Code

Full reference

Parameters

Request

Example response

Copilot AI

ChatGPT (chatgpt.com)

Felo AI

Chatex

Dolphin AI

Google AI (g.ai)

Synthesize

Code

Full reference

Parameters

Request

Example response

Related APIs

Copilot AI

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Dolphin AI

Google AI (g.ai)

Synthesize

Code

Full reference

Parameters

Request

Example response

Related APIs

Copilot AI

ChatGPT (chatgpt.com)

Felo AI

Chatex

Dolphin AI

Google AI (g.ai)