Token efficiency: tools for developers

Tools that reduce token costs, compress context or cache LLM requests. An entry can appear under several use cases when its topics or description provide several explicit signals.

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44 entries in this view.

Tool ranking

Mixed ranking: measured growth takes priority; entries without two snapshots are estimated. Raw values keep their source-specific window, shown under each tool; a change requires at least two snapshots from the last 7 days.

  1. 1

    Skill
    Active

    mcp-recall compresses MCP tool outputs (94 KB → 3.5 KB · 96%) and stores full results in SQLite for retrieval — up to 30x more tool calls per session for heavy MCP workloads.

    TypeScriptLicense: MIT
    • bun
    • claude
    • claude-code
    • claude-code-plugin
    • context-window

    githubmeasured growthOpen source ↗

    Install /plugin marketplace add sakebomb/mcp-recall

    8GitHub starsstable
  2. 2

    MCP
    Active

    Persistent memory + security layer for Claude Code (MCP plugin). Agents remember your project across sessions (~87% fewer context tokens), every tool call lands in a tamper-evident HMAC audit chain, and skills are AST-scanned +…

    TypeScriptLicense: MIT
    • agent-security
    • ai-agent-memory
    • ai-agents
    • audit-trail
    • claude-code

    githubmeasured growthOpen source ↗

    8GitHub starsstable
  3. 3

    Skill
    Active

    对标 claude-hud 核心功能，控制在 7 行以内更轻量。内置 13 个国产大模型平台用量查询 (智谱 GLM / MiniMax / DeepSeek / Kimi / StepFun / SiliconFlow 等)，第三方代理用户也能实时看到额度消耗。

    TypeScriptLicense: MIT
    • anthropic
    • claude
    • claude-code
    • claude-code-plugin
    • cli

    githubmeasured growthOpen source ↗

    Install /plugin marketplace add zander-zyx/claude-mini-hud

    9GitHub starsstable
  4. 4

    MCP
    Active

    Statically audits MCP tool surfaces for token cost, schema quality, and design issues.

    TypeScript

      mcpmeasured growthOpen source ↗

      Remote server, to be declared in the MCP configuration https://mcplint-web.vercel.app/api/mcp

      0GitHub starsstable
    • 5

      MCP
      Active

      Verifies token/cost savings claimed by AI context-reduction proxies via MCP tools.

      TypeScriptLicense: Apache-2.0

        mcpmeasured growthOpen source ↗

        Install claude mcp add tokentrust -- uvx tokentrust-cli

        0GitHub starsstable
      • 6

        Skill
        Active

        Claude Code skill — delegate coding tasks to Mistral Vibe, supervise via git diff & save 50-90% Claude token usage

        Shell
        • claude
        • claude-ai
        • claude-ai-skills
        • claude-code
        • claude-skill

        githubmeasured growthOpen source ↗

        Install git clone https://github.com/pcx-wave/vibe-skill ~/.claude/skills/vibe-skill

        117GitHub starsstable
      • 7

        CLI
        Active

        Measure and shrink the token cost of Claude Code skills, tier by tier: the always-on system-prompt tax, the per-invocation body, and on-demand references, each priced at the rate it is actually billed.

        PythonLicense: MIT
        • claude
        • claude-code
        • claude-code-skills
        • cli
        • cost-optimization

        githubmeasured growthOpen source ↗

        1GitHub starsstable
      • 8

        MCP
        Active

        Context compression plugin for Claude Code. Automatically trims large tool output—JSON, YAML, stack traces, and logs—before it enters the context window.

        TypeScriptLicense: MIT
        • claude-code
        • claude-code-plugin
        • context-compression
        • context-window
        • developer-tooling

        githubmeasured growthOpen source ↗

        64GitHub starsstable
      • 9

        Skill
        Active

        Claude Code skill: caveman-style token efficiency, spoken with a real Spanish regional accent

        JavaScriptLicense: MIT
        • agent-skills
        • ai-agents
        • anthropic
        • claude-code
        • claude-code-plugin

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add Mun1to/SpanishCaveMan

        2GitHub starsstable
      • 10

        Agent
        Active

        Agent context compressor and memory persistent orchestration

        TypeScriptLicense: Apache-2.0
        • a2a-protocol
        • agent-framework
        • ai
        • ai-agents-framework
        • ai-tools

        githubmeasured growthOpen source ↗

        2GitHub starsstable
      • 11

        Skill
        Active

        Eco mode for Claude Code. /eco: -31% to -73% output tokens with critical findings intact; /eco-max: up to -75% with lowered effort. Measured hardest on Claude Fable 5 (fable5), deep-studied on Sonnet 5, works on Opus 4.8 too. We publish our…

        JavaScriptLicense: MIT
        • ai-agents
        • anthropic
        • claude
        • claude-ai
        • claude-code

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add sup3x/claude-code-eco

        33GitHub starsstable
      • 12

        Skill
        Active

        Restore prior Claude Code AND Codex sessions with zero LLM calls. Cross-tool session handoff, cache-expiry prevention, real cost dashboard. One plugin, both hosts.

        JavaScriptLicense: Apache-2.0
        • anthropic-api
        • api-cost
        • billing-analytics
        • cache-management
        • claude-code

        githubmeasured growthOpen source ↗

        Install /plugin marketplace add ww-w-ai/super-token-saver

        31GitHub starsstable
      • 13

        Skill
        Active

        Automatically detect and disable irrelevant Claude Code skills per project to save tokens and streamline your tech workflow.

        PythonLicense: MIT
        • agents
        • ai-agents
        • antigravity
        • claude
        • claude-code-plugins

        githubmeasured growthOpen source ↗

        Install git clone https://github.com/mrdenox109-nyx/skill-manager ~/.claude/skills/skill-manager

        5GitHub starsstable
      • 14

        MCP
        Active

        Context optimization for LLM agents: tool registry, result masking, budgeting, compaction.

        RustLicense: NOASSERTION

          mcpmeasured growthOpen source ↗

          Install claude mcp add distil -- npx @munhq/distil

          1GitHub starsstable
        • 15

          Skill
          Active

          A Claude Code hook that routes each Read on a PDF to the path that actually works: text layer to UTF-8 text, scans to vision, and neither one through poppler.

          PythonLicense: MIT
          • claude-code
          • claude-code-hooks
          • claude-code-plugin
          • pdf
          • poppler

          githubmeasured growthOpen source ↗

          Install /plugin marketplace add WatsonTsai/pdf-text-router

          7GitHub starsstable
        • 16

          Skill
          Active

          Cut Claude Code token costs by delegating bulk LLM work to cheap models. 600+ models via NanoGPT, OpenRouter, Groq or local Ollama — batched, resumable, with real per-call cost tracking.

          PythonLicense: MIT
          • ai-agents
          • batch-processing
          • cheap-llm
          • claude-code
          • claude-code-agents

          githubmeasured growthOpen source ↗

          Install /plugin marketplace add bicced/sidequest

          1GitHub starsstable
        • 17

          Skill
          Active

          The Agent Knowledge Kit & Architecture System — 10–32x token-efficient architecture discovery for AI coding agents

          TypeScript
          • agentic-ai
          • ai-agents
          • antigravity
          • bun
          • claude-code

          githubestimated momentumOpen source ↗

          Install git clone https://github.com/chama-x/quiv ~/.claude/skills/quiv

          3GitHub stars—
        • 18

          Library
          Active

          A high-performance, ergonomic web framework for Rust with native AI/LLM support.

          RustLicense: Apache-2.0
          • ai-native
          • api-framework
          • async
          • backend
          • developer-tools

          githubestimated momentumOpen source ↗

          61GitHub stars—

        Learning resources

        Ranked by measured growth, normalized across sources. These resources remain available separately and do not take part in the main tool ranking.

        1. 1

          mcp-agent-skills-hub

          MCP
          ActiveOpen source ↗

          Molavi Agent Skills: Curated AI agent skills and MCP configs for Antigravity, Cursor, Codex & Claude — by Taghi Molavi

          JavaScriptLicense: MIT
          • agentic-workflows
          • ai-agents
          • ai-skills
          • antigravity
          • awesome-list
          githubResourcemeasured growth
          8GitHub starsstable