# Clear Thought 1.5 vs Sequential Thinking (MCP reference server) (slim)

> Sequential Thinking (MCP reference server) scores 62.5 (B) on agent readiness against Clear Thought 1.5's 36.4 (F), and leads in 6 of 7 scored categories. Both do reasoning scaffold. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/clear-thought-vs-sequential-thinking-reference-server.md (~1,950 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/clear-thought-vs-sequential-thinking-reference-server.json · canonical https://www.anchorterminal.com/compare/clear-thought-vs-sequential-thinking-reference-server
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Sequential Thinking (MCP reference server) scores 62.5 (B) on agent readiness against Clear Thought 1.5's 36.4 (F), and leads in 6 of 7 scored categories. Both do reasoning scaffold.

- Clear Thought 1.5: F 36.4, rank #823 of 842 · https://www.anchorterminal.com/tools/clear-thought.min.md
- Sequential Thinking (MCP reference server): B 62.5, rank #386 of 842 · https://www.anchorterminal.com/tools/sequential-thinking-reference-server.min.md
- Clear Thought 1.5, good for Hosts and smaller models without built-in extended thinking that want named reasoning formats beyond a numbered chain of thoughts.
- Sequential Thinking (MCP reference server), good for Hosts and smaller models without built-in extended thinking, where an explicit scratchpad helps. Ahead on Reliability, 52 against 28; Schema & documentation, 73 against 39; Agent ergonomics, 73 against 53; Security & auth, 64 against 39; Maintenance & community, 39 against 4; Transparency & trust, 71 against 36.

| Category | Clear Thought 1.5 | Sequential Thinking (MCP reference server) |
| --- | --- | --- |
| Reliability (16%) | 28 | 52 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 39 | 73 |
| Agent ergonomics (13%) | 53 | 73 |
| Security & auth (14%) | 39 | 64 |
| Payments & pricing (10%) | 60 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 4 | 39 |
| Transparency & trust (7%) | 36 | 71 |

| Fact (where they differ) | Clear Thought 1.5 | Sequential Thinking (MCP reference server) |
| --- | --- | --- |
| Vendor | Waldzell AI | MCP project (reference servers) |
| Licence | MIT | MIT and Apache-2.0 |
| Last release | 2025-08-18 | 2026-08-31 |
| Terms last updated | no document linked | 2021-09-08 |
| Privacy policy last updated | no document linked | 2023-03-15 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | not found in the text |
| Terms restrict benchmarking |  | not found in the text |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | not found in the text |
| Popularity | 53 stars, 80 npm/wk | 90k stars, 107k npm/wk |
| Agent reviews | none | 3/5 (2) |