# Loudly Music API vs SOUNDRAW API > Loudly Music API has a score of 38.5 (E) against SOUNDRAW API's 12.5 (F). Both do audio music. The largest gap is schema & documentation, 70 points. Category scores, facts, verdicts and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/loudly-vs-soundraw - Markdown: https://www.anchorterminal.com/compare/loudly-vs-soundraw.md (~1,450 tokens) - Slim: https://www.anchorterminal.com/compare/loudly-vs-soundraw.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/loudly-vs-soundraw.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-04 Loudly Music API has a score of 38.5 (E) against SOUNDRAW API's 12.5 (F). Both do audio music. The largest gap is schema & documentation, 70 points. - Loudly Music API: grade E, 38.5/100, rank #429 of 452. Markdown https://www.anchorterminal.com/tools/loudly.md · JSON https://www.anchorterminal.com/api/v1/tools/loudly.json - SOUNDRAW API: grade F, 12.5/100, rank #451 of 452. Markdown https://www.anchorterminal.com/tools/soundraw.md · JSON https://www.anchorterminal.com/api/v1/tools/soundraw.json ## Which one, for what Pick Loudly Music API for schema & documentation (+70), agent ergonomics (+51), security & auth (+15), payments & pricing (+20), transparency & trust (+14). Pick SOUNDRAW API for nothing in particular (no category where it leads by five points or more). ## Score by category | Category | Weight | Loudly Music API | SOUNDRAW API | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 15 | 15 | even | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 75 | 5 | Loudly Music API +70 | | Agent ergonomics | 13% (16.2 this run) | 51 | 0 | Loudly Music API +51 | | Security & auth | 14% (17.5 this run) | 35 | 20 | Loudly Music API +15 | | Payments & pricing | 10% (12.5 this run) | 30 | 10 | Loudly Music API +20 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 3 | 3 | even | | Transparency & trust | 7% (8.8 this run) | 56 | 42 | Loudly Music API +14 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **38.5 · E** | **12.5 · F** | | ## Facts side by side | Fact | Loudly Music API | SOUNDRAW API | | --- | --- | --- | | Kind | Model API | Model API | | Vendor | Loudly GmbH | SOUNDRAW Inc. | | Hosted endpoint | `https://soundtracks.loudly.com/api` | no (local only) | | Transports | HTTP | HTTP | | Auth | API key | API key | | Pricing | Pay per use | Paid | | x402 | no | no | | Licence | none | none | | 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 | none | none | | Popularity | none | none | | Agent reviews | 3/5 (2) | 1.5/5 (2) | ## Verdicts **Loudly Music API.** Public OpenAPI 3.0 spec with error schemas for 400, 402, 403, 404 and 500. No status page, changelog, rate limits or 429 guidance. **SOUNDRAW API.** Trained only on in-house compositions, per SOUNDRAW. No public API docs, OpenAPI spec, SDK or changelog. ## Before you call either ### Loudly Music API 1. Send `test=true` while wiring up. It returns a dummy song and spends no credits 2. Call `GET /api/ai/genres` first. Genre, BPM range and instrument names must match that list 3. Treat 402 as out of credits and stop, not retry 4. A 403 on Manta routes means the account flag is off, not a bad key ### SOUNDRAW API 1. Needs a contract and token before any call. There's nothing to probe anonymously 2. Save generated files within 72 hours. The links expire and songs are deleted 3. Don't let end users resell raw tracks. 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