ais MCP Server: 2,900 Tokens Per Recall vs 24,500 for Grep+Read, 40/40 Correct
Anode1_dev · reddit · 2026-09-28
The author released ais, an MCP server for exact agent recall: you file links, commands, paths or notes under your own keys, and ais --mcp exposes recall, find, tags and timeline over stdio.
Benchmarked against grep+read (8 questions × 5 repeats, claude-sonnet-4-6, same corpus):
- Correct answers: 40/40 vs 31/40
- Mean tokens per question: 2,900 vs 24,500
- Retrieval payload: 68 vs 4,744 tokens
Design notes: read-only by default (opt-in rw), wrong keys return nothing instead of fuzzy matches, encrypted values stay opaque to agents, multiple agents can share one index, single C binary with no database or runtime. Limitation: it only recalls what was manually filed, so it complements rather than replaces search. Open source with a reproducible public-corpus harness.
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