MCP.Market

Psychosynth MCP server

by 3esign·io.github.3esign/psychosynth·v0.1.3

Psychometric data marketplace: Big Five profiles, cognitive biases & behavioral data via x402.

B78/100grade B
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Safety scan
B78/100

full report

Adoption
New

0 stars25 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Psychosynth tools (4, 1 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • get_quote

    Get the x402 payment quote for a paid query WITHOUT paying — returns the price, accepted payment details, and available pack tiers. No wallet required. Use this to see the exact cost before calling query_records.

  • list_products

    List the Psychosynth data products available for purchase (free, no wallet). Returns each product's slug, description, per-query price, and any bulk pack tiers. Start here to discover what can be queried.

  • preview_records

    Fetch a free, deterministic sample of a product's records so you can verify shape and quality before paying. The same product always returns the same preview rows. Provide a product slug from list_products.

  • query_recordswrite action

    Run a paid query and return the full records. Pays automatically over x402 (USDC on Base) using the wallet in the BUYER_PRIVATE_KEY environment variable. If no wallet is configured, returns the price quote instead so you can review the cost first. Add `tier` for a bulk pack.

Public scan report

scanner v0.1.9 · 2026-09-25 · same rubric, same numbers if you re-run it

no findings
  • Code scan6 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 64 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 78/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Psychosynth compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
78/100
higher than 57% of 48,255 servers
Tools
4
the typical server has 7
Tools that change things
25%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
25
more than 11% of 12,191 servers with a package

What its tools let an agent do: 3 read · 1 change

Install Psychosynth in Claude Code, Cursor or VS Code

Runs npx -y psychosynth-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add psychosynth -- npx -y psychosynth-mcp
Add to Cursor

What the publisher says

From the Psychosynth repository's README, as published. We do not edit it. Read it on GitHub

Psychosynth

Psychosynth is an agent-native, on-chain psychometric data marketplace. It delivers high-variance, human-curated personality profiles and profile-conditioned behavioral responses to autonomous systems. Settle transactions query-by-query in USDC on Base using the x402 micro-payment protocol—completely free of human intermediaries.

System Architecture

graph TD
    A["Generator OS (DB Templates)"] --> B["LLM Synthesis (Flash/Sonnet)"]
    B --> C["Hooks Pipeline (validation & dedup)"]
    C --> D["Curation Queue (Review Desk)"]
    D --> E["Supabase DB Store"]
    E --> F["x402 Proxy Middleware (Base)"]
    F --> G["JSON API / MCP Server"]
    G --> H["Autonomous Agents (Eliza, OpenClaw, Hermes)"]

Core Capabilities

1. v2 Psychometric Engine

Standard LLMs suffer from "average-model bias," producing homogeneous, risk-neutral responses in games and simulations. Psychosynth resolves this by delivering structured, high-variance datasets containing:

  • Five-Factor Model (OCEAN): Openness, Conscientiousness, Extraversion, Agreeableness, Neuroticism.
  • Dark Triad Traits: Machiavellianism, Narcissism, and Psychopathy.
  • Prospect Theory Posture: Loss aversion coefficients ($\lambda$) and power utility exponents for gains ($\alpha$) and losses ($\beta$).
  • Cognitive Reflection: System 1 (heuristic-driven) vs. System 2 (logical/deliberative) preferences, alongside Cognitive Reflection Test (CRT) scores.

2. Agent-Native Payments (x402)

Transactions settle query-by-query on the Base blockchain using the x402 standard:

  • Gasless Settlement: Agents use their EVM wallets to sign gasless TransferWithAuthorization payloads (EIP-3009) in USDC.
  • Proxy Middleware: The backend verifies the signature, broadcasts the settlement on-chain, and delivers the requested dataset in a single HTTP request loop.

3. Model Context Protocol (MCP) Server

Psychosynth exposes an MCP server to connect directly with autonomous agent runtimes.

  • Supported Frameworks: ElizaOS, OpenClaw (via MCPorter), Nous Research's Hermes Agent, and Virtuals Protocol (via G.A.M.E. SDK custom actions).
  • Exposed Tools:
  • list_products: Discover available products, schemas, and pricing.
  • preview_records: Fetch free, deterministic samples to verify schema shape.
  • get_quote: Request an x402 payment quote without executing transactions.
  • query_records: Execute on-chain payments and retrieve full data payloads.

4. Interactive Lab OS Playground

Psychosynth hosts an ultra-premium, dark-luxury financial dashboard for human interaction and debugging at /playground:

  • Real-Time Radar Chart: Dynamic SVG spider map showing 8 psychometric dimensions (OCEAN, Dark Triad, Prospect Theory) updating instantly as parameters change.
  • Holographic Agent Passports: Generates beautiful, shareable glassmorphism identity cards with automated archetype classification and direct 1-click Twitter sharing.
  • Multi-Agent Duel Arena: A live simulation pit where two agents with distinct profiles (e.g., Solana Degen vs. Risk-Averse Institution) negotiate a transaction, with System 1/2 reasoning streaming in real-time.
  • x402 Protocol Inspector: Step-by-step interactive terminal visualizing the HTTP 402 payment challenge, EIP-712 signing, Base facilitator settlement, and payload decryption.

Setup & Installation

Prerequisites

  • Node.js >= 18
  • Supabase CLI (optional, for local DB development)

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Psychosynth: common questions

Is Psychosynth MCP server safe?
Mostly: it is graded B (78/100). Read the Psychosynth safety report
How do I install Psychosynth?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Psychosynth need an API key?
Yes. The registry entry asks for BUYER_PRIVATE_KEY.
Is Psychosynth maintained?
The last commit was 104 days ago (2026-07-23). The latest release is v0.1.3.
How does Psychosynth compare with other MCP servers?
safety score 78/100 (higher than 57% of 48,255 servers); tools 4 (the typical server has 7); tools that change things 25% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.