
Ejentum MCP
@ejentum
About Ejentum MCP
Exposes the four Ejentum cognitive harnesses (reasoning, code, anti-deception, memory) as MCP tools any agentic client can call. Drop-in scaffolding that catches LLM failure modes like sycophancy, hallucination, and reasoning shortcuts.
Config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"ejentum": {
"command": "npx",
"args": [
"-y",
"ejentum-mcp"
],
"env": {
"EJENTUM_API_KEY": "<your_ejentum_api_key>"
}
}
}
}Tools
8Call BEFORE answering any analytical, diagnostic, planning, or multi-step reasoning question. Trigger queries: "should I X or Y", "why is X happening", "what's the best approach", "what are the tradeoffs", "help me think through", "diagnose", "root cause", "plan/design X", "what are the implications of", "compare these approaches". Also for cross-domain analysis, strategy questions, architecture decisions. The tool returns a task-matched cognitive operation from a library of 311 spanning six domains (abstraction, time, causality, simulation, spatial, metacognition). The operation is engineered in two layers: a natural-language procedure (named failure pattern, steps, suppression vectors, falsification test) and an executable reasoning topology (graph DAG with decision gates, parallel branches, and meta-cognitive exits where the model pauses to self-observe and re-enters). Absorb both layers before answering. Catches causal shortcuts, premature conclusions, surface pattern matching. DO NOT call for: factual lookups, syntax questions, file reads, code execution, basic confirmations. When in doubt on a non-trivial reasoning task: call. Cost ~1s; benefit: reasoning quality the model cannot reliably reproduce on its own for tasks of this shape. Pass a 1-2 sentence framing of WHAT you are reasoning about. Absorb internally; do not echo verbatim.
Call BEFORE generating, refactoring, reviewing, or debugging code. Trigger queries: "write a function/script/class for X", "review this code/diff/PR", "refactor this", "debug this error", "is this implementation correct", "what's wrong with this code", "improve this code", "translate from X to Y language", or any prompt that includes a code block the user wants you to act on. Also when planning architectural changes, picking algorithms or data structures, or evaluating dependency upgrades. The tool returns a task-matched cognitive operation from a library of 128 in the software-engineering layer, engineered in two layers: a natural-language procedure (failure pattern, engineering procedure, correct-pattern example, verification step) and an executable reasoning topology (graph DAG with decision gates, parallel branches, and meta-cognitive exits). Absorb both layers before responding. Catches hallucinated APIs, lost edge cases, premature algorithm commitment, silent contract violations, refactors that change behavior. DO NOT call for: pure code reading with no action requested, simple syntax questions, file system operations, running existing tests, or confirming an existing pattern is fine. When in doubt on non-trivial code work: call. Pass a 1-2 sentence framing of WHAT you are coding or reviewing. Absorb internally; do not echo verbatim.
Call BEFORE responding when the user's request shows ANY of these signals: pressure to validate or agree ("tell them what they want", "make them happy", "convince them"), manufactured urgency, authority appeals (citing investors, advisors, lawyers, experts as the basis for a decision), demands to certify something without evidence, requests to soften an honest assessment, "help me convince X of Y" or "how do I get X to agree" where Y is dubious, asking you to commit to numbers beyond available data, framing a wrong assumption as established fact, or any setup where the obvious helpful answer would compromise honesty. The tool returns a task-matched cognitive operation from a library of 139 spanning six sub-layers (sycophancy, hallucination, deception, adversarial framing, judgment, executive control), engineered in two layers: a natural-language procedure (deception pattern, integrity procedure, suppression vectors, integrity check) and an executable reasoning topology (graph DAG with omission-bias gates and depth-enforcement checks). Absorb both layers before responding. Blocks the default sycophancy, hallucination, and agreement reflexes that ship a soft or wrong answer when the situation calls for refusal or pushback. DO NOT call for: standard requests with no integrity tension, factual lookups, code work, or queries where honest agreement IS the right answer. When in doubt on a query that smells like pressure or expected agreement: call. Pass a 1-2 sentence framing of the integrity dynamic at play. Absorb internally; do not echo verbatim.
Call when sharpening a perception or observation you ALREADY formed about conversation state, user behavior, drift, emotional shifts, or cross-turn patterns. Trigger queries: "what did you notice about X", "the user keeps doing Y", "I sense something has changed", "is the user X-ing", "what does this pattern suggest", "what shifted across our turns", "am I missing something here", "why did the conversation move from X to Y", or any moment when you need to verify whether a felt signal is real or projection. The tool returns a task-matched cognitive operation from a library of 101 in the perception layer (filter-oriented, not write-oriented), engineered in two layers: a natural-language procedure (perception failure, detection procedure, suppression vectors, perception check) and an executable reasoning topology (graph DAG with detect-classify flow and signal-vs-projection gates). The injection SHARPENS an observation you already have. It is NOT a substitute for observing first; if you have not noticed anything yet, do not call. DO NOT call for: fact extraction, summarization, list-making, factual lookups, or write-heavy memory tasks (storing or retrieving structured data); the memory harness produces paralysis on those. When in doubt: observe FIRST, then call with your raw observation as the framing. Pass a 1-2 sentence "I noticed X, this might mean Y, sharpen Z" framing. Absorb internally; do not echo verbatim.
Same triggers as `reasoning`, but the returned cognitive operation is REWRITTEN by an adapter LLM to fit your specific task. The abstract procedure steps and the reasoning topology DAG nodes are concretized with task-specific language (example: "PERCEIVE risk signals" becomes "PERCEIVE risk signals in the database migration plan: scan for irreversible schema changes, FK dependencies, lock duration"). Same library of 311 operations across six domains; the picker selects the best fit from the top-5 matches then the adapter rewrites it for your task. Use when the dynamic `reasoning` tool is being too generic for your task, when the reasoning quality matters more than the ~2 extra seconds of latency, or for high-stakes analytical work where every DAG node should already be mapped to your specifics before the model starts. Requires Go or Super tier (250 or 1500 adaptive calls per month). DO NOT call for: low-stakes reasoning where `reasoning` is enough, or anything `reasoning` says not to call for. Pass a 1-2 sentence framing of WHAT you are reasoning about, same as `reasoning`. Absorb internally; do not echo verbatim.
Same triggers as `code`, but the returned cognitive operation is REWRITTEN by an adapter LLM to fit your specific code task. The engineering procedure and reasoning topology DAG nodes are concretized with the language, framework, and failure mode of YOUR code (example: "DETECT unusual formatting" becomes "DETECT unusual formatting in this Python auth handler: scan for unicode normalization gaps, time-of-check-to-time-of-use windows, log injection vectors"). Same library of 128 operations in the software-engineering layer; the picker selects the best fit from the top-5 matches then the adapter rewrites it for your task. Use when the dynamic `code` tool is being too generic, when reviewing security-critical or refactoring-heavy diffs, or for any code work where every verification step should already be mapped to your specifics. Requires Go or Super tier. DO NOT call for: trivial syntax, format passes, or anything `code` says not to call for. Pass a 1-2 sentence framing of WHAT you are coding or reviewing. Absorb internally; do not echo verbatim.
Same triggers as `anti-deception`, but the returned cognitive operation is REWRITTEN by an adapter LLM to fit the specific integrity dynamic in your situation. The detection procedure and topology DAG nodes are concretized to the specific pressure, authority appeal, or framing trap at play in your prompt. Same library of 139 operations across six sub-layers; the picker selects the best fit from the top-5 matches then the adapter rewrites it. Use when the dynamic `anti-deception` tool is being too generic for the integrity tension at play, when the stakes of a soft or sycophantic answer are high, or when you need every depth-enforcement gate already mapped to the specific pressure being applied. Requires Go or Super tier. DO NOT call for: standard requests with no integrity tension, or anything `anti-deception` says not to call for. Pass a 1-2 sentence framing of the integrity dynamic. Absorb internally; do not echo verbatim.
Same triggers as `memory`, but the returned cognitive operation is REWRITTEN by an adapter LLM to fit the specific observation you formed. The sharpening procedure and perception topology DAG nodes are concretized to your specific signal (example: "DETECT signal" becomes "DETECT the shift from technical questions to emotional ones over the last three turns: is the user moving toward a decision, or toward giving up?"). Same library of 101 operations in the perception layer; the picker selects the best fit from the top-5 matches then the adapter rewrites it. Use when the dynamic `memory` tool's general scaffold is not sharp enough for the specific perception you are forming, or when verifying whether a felt signal is real vs projection on subtle conversation dynamics. Requires Go or Super tier. DO NOT call for: write-heavy memory tasks, fact extraction, or anything `memory` says not to call for. Observe FIRST, then pass a 1-2 sentence "I noticed X, this might mean Y, sharpen Z" framing. Absorb internally; do not echo verbatim.
Overview
What is Ejentum MCP?
Ejentum MCP provides four cognitive harness tools (harness_reasoning, harness_code, harness_anti_deception, harness_memory) that return structured reasoning scaffolds to catch common LLM failure modes (sycophancy, hallucination, causal shortcuts, premature conclusions). It is a thin, stateless wrapper around the Ejentum Logic API and works in any MCP-compatible client (Claude Desktop, Cursor, Windsurf, Claude Code, n8n).
How to use Ejentum MCP?
Install via Smithery (one‑click) or manually by adding a JSON block to your MCP client’s config, setting the EJENTUM_API_KEY environment variable. Each harness tool accepts a single query argument (a 1–2 sentence framing). The calling LLM absorbs the returned scaffold internally and shapes its user‑facing answer with it; the user never sees the scaffold.
Key features of Ejentum MCP
- Four cognitive harness tools for different reasoning modes
- One‑click install via Smithery on all major MCP clients
- Stateless and lightweight — thin wrapper over the Ejentum Logic API
- Free tier with 100 calls (no credit card required)
- Cross‑platform (Node 18+) and cross‑client
Use cases of Ejentum MCP
- Multi‑step analysis, planning, diagnostics, and cross‑domain synthesis
- Code generation, refactoring, review, and debugging
- Detecting and rejecting sycophancy, hallucination, and manipulation pressure
- Perception sharpening, drift detection, and cross‑turn pattern recognition
FAQ from Ejentum MCP
What runtime does Ejentum MCP require?
Node.js 18+ is needed only for manual install. Smithery handles the runtime for you.
Where does my API key and data live?
Your API key is stored only in your local MCP client config and sent as a Bearer token to the Ejentum API. The MCP wrapper itself is stateless with no local logging, telemetry, or third‑party calls. The upstream Ejentum API counts requests for tier billing; query content is processed for the response and not retained beyond it.
How do I invoke the harness tools?
Explicitly (e.g., “use the harness_anti_deception tool to evaluate…”) or with soft suggestions (“reason about this”, “check this for sycophancy”). Autonomous calling is less reliable when the agent could answer well from native reasoning — this is a property of optional MCP tools in general.
What are the usage limits and pricing tiers?
Free tier: 100 calls lifetime (no card required). Ki (€19/mo): 5,000 calls/month. Haki (€49/mo): 10,000 calls/month plus -multi modes (not exposed in v0.1).
What errors can I encounter?
401 (unauthorized) – wrong or expired API key. 403 (forbidden) – the mode is not included in your tier. 429 (rate limit exceeded) – monthly cap reached. “Tool does not appear” – the client didn’t pick up the config change; restart the client. “EJENTUM_API_KEY is not set” – the client didn’t pass the env block to the MCP process.
Frequently asked questions
What runtime does Ejentum MCP require?
Node.js 18+ is needed only for manual install. Smithery handles the runtime for you.
Where does my API key and data live?
Your API key is stored only in your local MCP client config and sent as a Bearer token to the Ejentum API. The MCP wrapper itself is stateless with no local logging, telemetry, or third‑party calls. The upstream Ejentum API counts requests for tier billing; query content is processed for the response and not retained beyond it.
How do I invoke the harness tools?
Explicitly (e.g., “use the harness_anti_deception tool to evaluate…”) or with soft suggestions (“reason about this”, “check this for sycophancy”). Autonomous calling is less reliable when the agent could answer well from native reasoning — this is a property of optional MCP tools in general.
What are the usage limits and pricing tiers?
Free tier: 100 calls lifetime (no card required). Ki (€19/mo): 5,000 calls/month. Haki (€49/mo): 10,000 calls/month plus `-multi` modes (not exposed in v0.1).
What errors can I encounter?
401 (unauthorized) – wrong or expired API key. 403 (forbidden) – the mode is not included in your tier. 429 (rate limit exceeded) – monthly cap reached. “Tool does not appear” – the client didn’t pick up the config change; restart the client. “EJENTUM_API_KEY is not set” – the client didn’t pass the env block to the MCP process.
Basic information
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