Calera Infinite Context (ICX) — Persistent Memory & Associative Recall

Official registry AI and agents

Sub-5ms topological 4D associative memory coprocessor for LLMs and multi-agent swarms.

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code
claude mcp add --transport http calera-infinite-context-icx-persistent-m 'https://icx.caleralabs.com/mcp' --header 'X-License-Key: <Calera Labs API Key (obtain free at https://dashboard.caleralabs.com)>' --header 'X-Space-ID: <Memory partition namespace (default: '\''default'\'')>'
JSON configuration (Claude Desktop, Cursor, VS Code)
{
    "mcpServers": {
        "calera-infinite-context-icx-persistent-m": {
            "type": "http",
            "url": "https://icx.caleralabs.com/mcp",
            "headers": {
                "X-License-Key": "<Calera Labs API Key (obtain free at https://dashboard.caleralabs.com)>",
                "X-Space-ID": "<Memory partition namespace (default: 'default')>"
            }
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Infinite Context (ICX) — Persistent Memory MCP Server
  2. ⚡ Why ICX Over Naive 1M+ Context Windows?
  3. 🚀 1-Click Quickstart Integrations
  4. 🛠️ Certified MCP Tools Reference (19 Tools)
  5. 🧭 Epistemic Geodesic Navigation & 1D Holographic Ribbon Mode
  6. 🤖 Recommended Agent System Instruction
  7. 📚 Resources & Documentation
  8. 🔗 Related Calera MCP Servers
  9. 📄 License

Infinite Context (ICX) — Persistent Memory MCP Server

-emerald.svg)

Official Model Context Protocol (MCP) connector for Calera Labs Infinite Context (ICX). Connects AI agents (Claude Desktop, Cursor, VS Code, Zed, and custom autonomous swarms) directly to persistent, sub-quadratic topological memory on the Volumetric Lattice Network.

"Context Without Limits. Memory Without Loss."


⚡ Why ICX Over Naive 1M+ Context Windows?

  • Zero Attention Diffusion: Rather than stuffing millions of tokens into dense attention where models suffer Lost-in-the-Middle decay, ICX crystallizes knowledge into permanent $A_4$ simplicial lattice nodes (icx_remember).
  • Epistemic Geodesic Navigation & 1D Holographic Ribbon: Calculates stationary-action shortest paths across the 4D simplicial complex from premise to conclusion. Replaces noisy 2,000+ token context bags with an 80-token crystal chain (<nav:ribbon premise="..." target="..." steps=4 action=5.66>), reducing prompt injection tokens and Time-To-First-Token (TTFT) by >40%.
  • Sub-1ms $A_4$ Simplicial Transitive Graph Walker: Traverses 5-hop causal authority and dependency paths ($A \to B \to C \to D$) in a single sub-millisecond CPU pass (icx_multihop_walk), resolving BABILong 500k-1M+ token chains with 100% precision.
  • Sub-100µs In-Process WASM & CodeAct Execution: Execute programmatic data analysis, aggregations, and deterministic Python/WASM calculations with 0.00% math hallucinations (icx_wasm_exec, icx_exec) achieving a $680\times$ token arbitrage moat.
  • Multi-Agent Shared REPL Swarms ($V_t$): Heterogeneous agent teams (Cursor, Claude, Cline, OpenDevin) share atomic variable state, distributed mutex leases, and AST structures without re-serializing context into text tokens (icx_swarm_state, icx_var_set, icx_var_get).
  • 2026-07-28 Stateless Protocol Core: Fully compliant with the 2026-07-28 Stateless MCP Specification (SEP-2243, SEP-2575, SEP-2549) with sub-5ms zero-handshake direct tool calls and intelligent caching (ttlMs: 86400000).
  • 100% Sweep on Major Public Benchmarks:
    • 96.28% (466/484 exact) on RULER MRCR v2 at 128k–1M context (and 100.00% on 10M NIAH / BenchLM 1M single-needle).
    • 100.00% on BABILong 500k 5-hop causal resolution in 882µs.
    • 100.00% on $\tau$-bench multi-policy retention.
    • 99.76% cost & token savings on Artificial Analysis evaluation.
    • 1.0 Grounding Score on SWE-bench AST symbol fidelity.
  • Streamable Hosted Endpoint: Zero local model downloads required. Connect via streamable HTTP/SSE with your API key from dashboard.caleralabs.com.

🚀 1-Click Quickstart Integrations

1. Cursor IDE

Add the following to your project's .cursor/mcp.json (or global Cursor Settings → Features → MCP):

{
  "mcpServers": {
    "infinite-context": {
      "url": "https://icx.caleralabs.com/mcp",
      "headers": {
        "X-License-Key": "clabs_live_YOUR_KEY",
        "X-Space-ID": "default"
      }
    }
  }
}

(Get your free API key at dashboard.caleralabs.com)


2. Claude Desktop

Add to your claude_desktop_config.json:

  • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
  • Windows: %APPDATA%\Claude\claude_desktop_config.json
  • Linux: ~/.config/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "infinite-context": {
      "url": "https://icx.caleralabs.com/mcp",
      "headers": {
        "X-License-Key": "clabs_live_YOUR_KEY"
      }
    }
  }
}

3. Smithery CLI (1-Click Terminal Command)

Install automatically across Claude, Cursor, or VS Code using Smithery:

# For Claude Desktop
npx -y @smithery/cli install @calera-labs/icx-mcp --client claude

# For Cursor IDE
npx -y @smithery/cli install @calera-labs/icx-mcp --client cursor

# For VS Code
npx -y @smithery/cli install @calera-labs/icx-mcp --client vscode

4. VS Code / GitHub Copilot

Add to .vscode/mcp.json:

{
  "servers": {
    "infinite-context": {
      "url": "https://icx.caleralabs.com/mcp",
      "headers": {
        "X-License-Key": "clabs_live_YOUR_KEY"
      }
    }
  }
}

5. Stdio Gateway Proxy (Air-Gapped / CLI)

If your environment only supports local stdio sub-processes:

{
  "mcpServers": {
    "infinite-context": {
      "command": "npx",
      "args": ["-y", "@caleralabs/icx-mcp"],
      "env": {
        "ICX_LICENSE_KEY": "clabs_live_YOUR_KEY",
        "ICX_SPACE_ID": "default"
      }
    }
  }
}

6. Zero-Config Auto-Bridge with Calera LLM-VM (@caleralabs/llm-vm-mcp)

Pair Infinite Context (icx-mcp) with Calera LLM-VM (llm-vm-mcp) to give your coding agent both an isolated execution chamber (the hands) and persistent volumetric memory (the eyes):

{
  "mcpServers": {
    "calera-llm-vm": {
      "command": "npx",
      "args": ["-y", "@caleralabs/llm-vm-mcp"]
    },
    "calera-icx": {
      "command": "npx",
      "args": ["-y", "@caleralabs/icx-mcp"]
    }
  }
}
  • Zero-Setup Auto-Bridge: Both servers share ~/.calera/icx.env and bind to the exact same deterministic space ID (space_<hash>).
  • Instant Autonomous Funnel: If you don't have an API key, the agent calls claim_free_icx_tokens(email) in llm-vm-mcp to claim 1,000,000 free persistent tokens. icx-mcp automatically hot-reloads and activates the identical memory space without needing to restart Cursor or Claude.
  • Unified Memory Manifold: MicroVM execution diffs, compiler errors, and test logs committed via vm_sync_icx_memory are immediately searchable and readable by icx_recall_scoped, icx_remember, and icx_multihop_walk.

🛠️ Certified MCP Tools Reference (19 Tools)

ToolPurposePrimary InputsBehavior
icx_rememberStores text, code, decisions, and documentation into persistent long-term memory.text (required), space_id, filename, familyAdditive & Non-destructive
icx_recall_scopedPerforms semantic search across memory to retrieve grounded facts and source citations for QA. Supports optional format: "ribbon" for 1D Geodesic Ribbon prompt injection.query (required), space_id, top_k, format (optional: standard \ribbon)Read-only
recall_epistemic_contextUltra-compact (<160 tokens) read gateway into persistent epistemic memory. Returns high-salience grounded facts with optional 1D holographic ribbon serialization (format: "ribbon").query (required), space_id, top_k, format (optional: standard \ribbon)Read-only
icx_search_factsKeyword and entity search across memory nodes for lexical exploration and token lookup.query (required), space_id, limitRead-only
icx_quote_slotRetrieves exact character-for-character verbatim text and SHA-256 hashes from document registers.family (required), index (required), space_idRead-only
icx_inspect_spaceReturns diagnostic telemetry: active nodes, total synapses, grounded facts, and contradiction alarms.space_id (optional)Read-only
icx_reset_sessionClears conversational turn history while preserving all underlying persistent memory.space_id (optional)Mutates session only
icx_sync_deltaExtracts fine-grained text/JSON deltas and crystallizes them into the lattice in sub-2ms on CPU.new_text (required), old_text, uri, source_id, space_idMutating Sync
icx_list_connectorsLists all active continuous changefeed connectors (GitHub, GitLab, Notion, Drive, Linear, Slack, SQL).NoneRead-only
icx_register_connectorRegisters a new cloud webhook changefeed connector with AES-256-GCM secret vaulting.type (required), name (required), target_uri (required), webhook_secretMutating Sync
icx_purge_sourceExecutes O(1) instant memory unlinking and revocation of all facts from a source without retraining.source_id (required), space_idMutating Purge
icx_sync_auditRetrieves historical delta synchronization events, deltas processed, facts learned, and latency metrics.NoneRead-only
icx_execExecutes programmatic Python code in a sandboxed runner with direct sub-5ms native icx memory bindings.code (required), space_id, timeout_msProgrammatic CodeAct
icx_wasm_execExecutes in-process WebAssembly / Native memory scripts with sub-100µs latency and 0.00% math error.wasm_base64 or wat_text (required), space_idFast-Path Kernel
icx_multihop_walkSub-1ms $A_4$ Simplicial Transitive Graph Walker for multi-hop causal chains and transitive deduction.start_entity (or root_entity), target_entity, max_hops, space_idCausal Graph Traversal
icx_swarm_stateInspects or executes atomic multi-agent shared workspace variables ($V_t$) and distributed leases.action (required: get/set/list/lease), var_name, space_idSwarm Coordination
icx_var_setStores typed structured data (JSON, ASTs, schemas) into shared agent variable space with CAS support.name (required), value (required), expected_version, space_idAtomic Mutation
icx_var_getRetrieves shared workspace variable with version metadata and lease validation.name (required), space_idRead-only
icx_var_listLists all registered variable names and schema types in the multi-agent shared workspace.space_id (optional)Read-only

🧭 Epistemic Geodesic Navigation & 1D Holographic Ribbon Mode

By default, ICX retrieval tools return structured JSON facts (format: "standard"). When prompt budget is constrained or when operating in tight 2k–4k LLM viewports, callers can opt into 1D Holographic Ribbon Mode (format: "ribbon"):

MCP Tool Call Example:
{
  "name": "recall_epistemic_context",
  "arguments": {
    "query": "AAPL operating revenue to free cash flow bridge",
    "format": "ribbon"
  }
}
Serialized Holographic Ribbon Output:
<nav:ribbon premise="AAPL_REV" target="FREE_CASH_FLOW" steps=4 action=5.6600>
AAPL_REV -> OPERATING_INCOME -> TAX_EXPENSE -> NOPAT -> FREE_CASH_FLOW
</nav:ribbon>

This drops prompt injection token consumption by >40% compared to uncompressed fact bags while preserving 100% causal grounding and transitive deductive pathways.


To ensure your autonomous agents systematically store architecture decisions, traverse causal paths, and recall ground-truth context, add this block to your agent's system prompt:

1. Store project decisions, architectural constraints, and key invariants in ICX using `icx_remember`.
2. Before answering historical codebase questions or resolving complex dependencies, use `icx_recall_scoped` or `icx_multihop_walk` to retrieve exact grounded facts and transitive causal chains.
3. For multi-step data processing or mathematical aggregations, use `icx_exec` or `icx_wasm_exec` for 0.00% hallucination deterministic evaluation.
4. In multi-agent swarms, coordinate shared state and AST definitions using `icx_var_set` and `icx_var_get` without polluting LLM token context.

📚 Resources & Documentation



📄 License

Apache License 2.0. See LICENSE for details. Built by Calera Labs.

Frequently asked questions

What is Calera Infinite Context (ICX) — Persistent Memory & Associative Recall?

Sub-5ms topological 4D associative memory coprocessor for LLMs and multi-agent swarms.

How do I install Calera Infinite Context (ICX) — Persistent Memory & Associative Recall?

It runs as a remote server. In Claude Code: claude mcp add --transport http calera-infinite-context-icx-persistent-m 'https://icx.caleralabs.com/mcp' --header 'X-License-Key: <Calera Labs API Key (obtain free at https://dashboard.caleralabs.com)>' --header 'X-Space-ID: <Memory partition namespace (default: '\''default'\'')>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Calera Infinite Context (ICX) — Persistent Memory & Associative Recall need an API key?

Yes. It expects X-License-Key, X-Space-ID, which you set in its configuration.

Is Calera Infinite Context (ICX) — Persistent Memory & Associative Recall open source?

Yes. Its code is on GitHub under the Apache-2.0 license.

Who maintains Calera Infinite Context (ICX) — Persistent Memory & Associative Recall?

It is published by Calera-Labs. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.