Psychosynth MCP server
io.github.3esign/psychosynth·v0.1.3Psychometric data marketplace: Big Five profiles, cognitive biases & behavioral data via x402.
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 postsRead from the package source without running it. The installed server may list more.
get_quoteGet 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_productsList 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_recordsFetch 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 actionRun 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
- 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
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
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.