# Loudly Music API vs Suno MCP (slim)

> Loudly Music scores 38.3 (E) to Suno MCP's 31.4 (F) for music generation. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/loudly-vs-suno-mcp.md (~3,500 tokens) · this version ~1,880 tokens · JSON https://www.anchorterminal.com/compare/loudly-vs-suno-mcp.json · canonical https://www.anchorterminal.com/compare/loudly-vs-suno-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-01
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Loudly Music API scores 38.3 (E) on agent readiness against Suno MCP's 31.4 (F), and leads in 3 of 7 scored categories. Suno MCP leads on security & auth and maintenance & community. Both do music generation.

- Loudly Music API: E 38.3, rank #1143 of 1251 · https://www.anchorterminal.com/tools/loudly.min.md
- Suno MCP: F 31.4, rank #1174 of 1251 · https://www.anchorterminal.com/tools/suno-mcp.min.md
- Loudly Music API, good for Apps that need instrumental tracks with stems, remix and mastering from one vendor under a royalty-free licence, and that can start on a free allowance. Ahead on Schema & documentation, 75 against 24; Agent ergonomics, 51 against 14.
- Suno MCP, good for An assistant making full songs with vocals, covers and extensions for a person who has a Suno account, inside Claude, ChatGPT, Gemini or Cursor. Ahead on Security & auth, 49 against 35; Maintenance & community, 60 against 3. Also Free to start without a card.

| Category | Loudly Music API | Suno MCP |
| --- | --- | --- |
| Reliability (16%) | 15 | 13 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 75 | 24 |
| Agent ergonomics (13%) | 51 | 14 |
| Security & auth (14%) | 35 | 49 |
| Payments & pricing (10%) | 30 | 32 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 3 | 60 |
| Transparency & trust (7%) | 54 | 55 |

| Fact (where they differ) | Loudly Music API | Suno MCP |
| --- | --- | --- |
| Kind | Model API | MCP server |
| Vendor | Loudly GmbH | Suno |
| Hosted endpoint | `https://soundtracks.loudly.com/api` | `https://api.suno.com/mcp` |
| Auth | API key | OAuth |
| Pricing | Pay per use | Freemium |
| Licence | none | Proprietary hosted service under Suno's terms of service (last revised 10 August 2026, effective 3 September 2026). Output ownership depends on the plan. Pro and Premier users own their songs, and Free (Basic) songs are owned by Suno and limited to personal, non-commercial use |
| Last release | none | 2026-10-28 |
| Terms last updated | no date given | 2026-08-10 |
| Privacy policy last updated | couldn't be read | 2026-06-23 |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Agent reviews | 3/5 (2) | none |

Why the edge:
- Maintenance & community, Suno MCP +57: Loudly Music API 3 (No dated release, changelog entry or API change found (0). No dated entries in the last 90 days (0). No public changelog. Support is help@loudly.com (3). No official SDK (0). No package to judge (0).); Suno MCP 60 (The server launched on 28 October 2026, four days before this check (30). The release notes have 13 dated entries since 3 August 2026, one of them about the MCP server (20). Public release notes, a help centre with an MCP category, a support email and a Discord server, with response times not checked (10 of 25). Not in the official MCP registry under a Suno namespace. The two Suno entries there are third-party wrappers (0 of 15). No package to judge (0 of 10). Total 60.)
- Schema & documentation, Loudly Music API +51: Loudly Music API 75 (Public OpenAPI 3.0 spec covering 19 paths across account, catalogue, generation, Manta, remix, mastering and stems (25). The site has an llms.txt, but it only links to the Music API page, with no agent-facing API docs (5). Every operation carries a description, though few say when not to use one (14). Enums for energy, key root and quality, model version (`VEGA_1`, `VEGA_2`) and stem model, a 30 to 420 second range for duration, and genres fetched from an endpoint rather than enumerated in the spec (13). Error schemas with example payloads for 400, 402, 403, 404 and 500 (13). Version 1.0.0 in the spec, no public changelog (5).); Suno MCP 24 (Suno doesn't publish the server's tool list, and the tool definitions can be read only after signing in, which this run didn't do, so no contract is public (0 of 25). suno.com/llms.txt is Markdown written for agents but describes the app as of 29 May 2026 and says nothing about the MCP server (5 of 10). suno.com/mcp and the help article list what the server does (songs, covers, extensions, mashups, Speech, uploads, Voices, playlists, credits) without per-tool purpose or when not to call (5 of 20). Typed inputs weren't readable (0 of 15). Three example prompts on suno.com/mcp, and only the 401 with its resource metadata is documented as an error (4 of 15). Dated release notes with an entry for the launch, but no server version or MCP changelog (10 of 15). Total 24.)
- Agent ergonomics, Loudly Music API +37: Loudly Music API 51 (Responses are JSON with track URLs (15) and duration is a parameter, but we found no output format choice in the spec (5). List endpoints take `page` and `limit` and return page metadata (10). Error payloads name the cause, including 402 for credits and 403 when the Manta flag is off, with no 429 documented (15). No idempotency key or retry guidance, and `test=true` helps wiring but not retries (0). Genre, BPM and instrument values must match the genres endpoint, and requests are multipart form data (6). No official SDK (0).); Suno MCP 14 (Tool count and definition size couldn't be read without signing in, so context cost scores as not found (0 of 25). The `library:search` scope shows library search exists, with no paging or size controls documented (5 of 20). Only the 401 is documented (4 of 20). Idempotency and readOnlyHint or destructiveHint annotations couldn't be read (0 of 20). Setup needs no API key and Suno's examples are plain requests, but required parameters are unknown, and an MCP server needs no SDK (5 of 15). Total 14.)
- Security & auth, Suno MCP +14: Loudly Music API 35 (A plain key from the self-serve developer portal in an `API-KEY` header, with no scopes, rotation or expiry documented (20). No least-privilege or read-only mode (0). Returns generated audio and catalogue metadata from Loudly's own library, no untrusted content (10). A credits endpoint shows the balance, with no per-call log found (5). No security.txt, disclosure policy, bug bounty or certification found (0).); Suno MCP 49 (OAuth on Suno's own authorisation server, with authorisation code and PKCE S256, refresh tokens, a revocation endpoint, open client registration, client ID metadata documents and bearer tokens in the header only. The resource lists eight scopes and keeps spending credits in its own `credits:spend` scope (30 of 30). The scopes separate reading, searching, writing the library and spending, but no read-only connection, spending cap or confirmation step is documented, and the consent screen wasn't seen (6 of 20). Results come from the user's own library and Suno's generation, with lyrics and titles that may come from shared or remixed songs, and no injection guidance (8 of 15). Every song lands in the library and the credit balance can be checked, with no per-call log (5 of 15). No security.txt on suno.com or api.suno.com, and no disclosure policy, bug bounty or certification found (0 of 20). Total 49.)