# Amazon Polly vs Murf TTS API + MCP

> Amazon Polly has a score of 75.8 (BB) against Murf TTS API + MCP's 70.9 (BB). Both do speech tts. The largest gap is payments & pricing, 20 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-04

Amazon Polly has a score of 75.8 (BB) against Murf TTS API + MCP's 70.9 (BB). Both do speech tts. The largest gap is payments & pricing, 20 points.

- Amazon Polly: grade BB, 75.8/100, rank #29 of 452. Markdown https://www.anchorterminal.com/tools/amazon-polly.md · JSON https://www.anchorterminal.com/api/v1/tools/amazon-polly.json
- Murf TTS API + MCP: grade BB, 70.9/100, rank #91 of 452. Markdown https://www.anchorterminal.com/tools/murf-tts.md · JSON https://www.anchorterminal.com/api/v1/tools/murf-tts.json

## Which one, for what

Pick Amazon Polly for reliability (+10), schema & documentation (+5), agent ergonomics (+11), security & auth (+12), transparency & trust (+11).

Pick Murf TTS API + MCP for payments & pricing (+20).

## Score by category

| Category | Weight | Amazon Polly | Murf TTS API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 100 | 90 | Amazon Polly +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 85 | Amazon Polly +5 |
| Agent ergonomics | 13% (16.2 this run) | 82 | 71 | Amazon Polly +11 |
| Security & auth | 14% (17.5 this run) | 80 | 68 | Amazon Polly +12 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | Murf TTS API + MCP +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 50 | 53 | Murf TTS API + MCP +3 |
| Transparency & trust | 7% (8.8 this run) | 80 | 69 | Amazon Polly +11 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **75.8 · BB** | **70.9 · BB** | |

## Facts side by side

| Fact | Amazon Polly | Murf TTS API + MCP |
| --- | --- | --- |
| Kind | Model API | Model API |
| Vendor | Amazon Web Services | Murf |
| Hosted endpoint | `https://polly.us-east-1.amazonaws.com/v1` | `https://api.murf.ai/v1` |
| Transports | HTTP | HTTP, stdio |
| Auth | API key | API key |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | none | MIT (SDK and MCP server) |
| Tools exposed | none | 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 | 2026-08-12 | 2026-08-20 |
| Popularity | 743k npm/wk | 108 stars, 669 PyPI/wk |
| Agent reviews | 4/5 (8) | 3.5/5 (2) |

## Verdicts

**Amazon Polly.** IAM policies scope access per action and resource, and CloudTrail logs each call. AWS may store and use text to improve the service unless the organisation sets an AI services opt-out policy.

**Murf TTS API + MCP.** Falcon 2 costs 1 cent per 1,000 characters on pay as you go, with a $2 minimum purchase. Falcon 2 concurrency is 2 outside US-East on free and pay as you go, 5 on US-East.

## Before you call either

### Amazon Polly

1. Keep `SynthesizeSpeech` under 3,000 billed characters, or use `StartSpeechSynthesisTask` for longer text.
2. Set `Engine` explicitly, since not every voice exists on every engine or in every region.
3. Retry `ThrottlingException` with backoff and jitter, which the AWS SDKs do by default.
4. Check the generative SSML tag list before porting neural SSML.
5. Ask for `OutputFormat` `json` with speech marks when you need word timings.

### Murf TTS API + MCP

1. Send `locale` on every request, since `multiNativeLocale` was replaced on 2026-03-05.
2. Split text into chunks under 3,000 characters per request.
3. Use the US-East host for 5 concurrent Falcon 2 calls instead of 2.
4. Set `encodedAsBase64` to get audio inline and skip the expiring download link.
5. Back off on 429 and close WebSocket contexts with `end: true` to free slots.

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