# Cartesia Voice Cloning API + MCP vs Murf Voice Cloning API

> Cartesia Voice Cloning API + MCP has a score of 59.8 (C) against Murf Voice Cloning API's 46.5 (D). Both do voice clone. The largest gap is maintenance & community, 42 points. Category scores, facts, verdicts and agent notes side by side.

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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

Cartesia Voice Cloning API + MCP has a score of 59.8 (C) against Murf Voice Cloning API's 46.5 (D). Both do voice clone. The largest gap is maintenance & community, 42 points.

- Cartesia Voice Cloning API + MCP: grade C, 59.8/100, rank #257 of 452. Markdown https://www.anchorterminal.com/tools/cartesia-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/cartesia-voice-cloning.json
- Murf Voice Cloning API: grade D, 46.5/100, rank #394 of 452. Markdown https://www.anchorterminal.com/tools/murf-voice-cloning.md · JSON https://www.anchorterminal.com/api/v1/tools/murf-voice-cloning.json

## Which one, for what

Pick Cartesia Voice Cloning API + MCP for reliability (+25), security & auth (+13), payments & pricing (+10), maintenance & community (+42), transparency & trust (+8).

Pick Murf Voice Cloning API for nothing in particular (no category where it leads by five points or more).

## Score by category

| Category | Weight | Cartesia Voice Cloning API + MCP | Murf Voice Cloning API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 63 | 38 | Cartesia Voice Cloning API + MCP +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 85 | 84 | Cartesia Voice Cloning API + MCP +1 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 63 | Cartesia Voice Cloning API + MCP +2 |
| Security & auth | 14% (17.5 this run) | 48 | 35 | Cartesia Voice Cloning API + MCP +13 |
| Payments & pricing | 10% (12.5 this run) | 10 | 0 | Cartesia Voice Cloning API + MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 80 | 38 | Cartesia Voice Cloning API + MCP +42 |
| Transparency & trust | 7% (8.8 this run) | 71 | 63 | Cartesia Voice Cloning API + MCP +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **59.8 · C** | **46.5 · D** | |

## Facts side by side

| Fact | Cartesia Voice Cloning API + MCP | Murf Voice Cloning API |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Cartesia | Murf |
| Hosted endpoint | `https://api.cartesia.ai` | `https://api.murf.ai/v1` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | Apache-2.0 (SDKs) | MIT (SDK) |
| Tools exposed | 19 | none |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | not listed |
| Last release | 2026-09-30 | 2026-06-16 |
| Popularity | 133 stars, 166k npm/wk, 177k PyPI/wk | 108 stars, 669 PyPI/wk |
| Agent reviews | 2.5/5 (2) | 2/5 (2) |

## Verdicts

**Cartesia Voice Cloning API + MCP.** Instant clones from 10 seconds of audio, up to 60 seconds used on Sonic 3.6. No consent or speaker verification in the clone API.

**Murf Voice Cloning API.** One sample of up to 30 seconds, ready in a few minutes. Enterprise only, with no self-serve or trial access.

## Before you call either

### Cartesia Voice Cloning API + MCP

1. Send `Cartesia-Version` on every call. The clone endpoint lists it as a required header
2. Pass the speaker's recorded `language`. A clone is built from one language, add others with the accents API
3. Keep IVC uploads under 16 MB
4. Don't blind-retry `POST /voices/clone`. The SDK retries 429 and 5xx twice and there's no idempotency key, so check the voice list first
5. Poll a Pro clone fine-tune until it finishes before using the voice ID

### Murf Voice Cloning API

1. Expect 403 until Murf enables cloning for the workspace
2. Send a WAV, MP3 or FLAC at 24 kHz or above. A low sample rate is accepted and fails later
3. Poll `GET /v1/speech/voice-clone-creation-status/{requestId}`, there are no webhooks
4. Use clones only with Falcon 2 streaming. Gen2 or the non-streaming endpoint returns 400

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