Psychometric data marketplace: Big Five profiles, cognitive biases & behavioral data via x402.
Connect Runs on your machine
claude mcp add psychosynth -e PSYCHOSYNTH_API_URL=<PSYCHOSYNTH_API_URL> -e BUYER_PRIVATE_KEY=<BUYER_PRIVATE_KEY> -e BASE_RPC_URL=<BASE_RPC_URL> -- npx -y [email protected]{
"mcpServers": {
"psychosynth": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"PSYCHOSYNTH_API_URL": "<PSYCHOSYNTH_API_URL>",
"BUYER_PRIVATE_KEY": "<BUYER_PRIVATE_KEY>",
"BASE_RPC_URL": "<BASE_RPC_URL>"
}
}
}
}{
"mcpServers": {
"psychosynth": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"PSYCHOSYNTH_API_URL": "<PSYCHOSYNTH_API_URL>",
"BUYER_PRIVATE_KEY": "<BUYER_PRIVATE_KEY>",
"BASE_RPC_URL": "<BASE_RPC_URL>"
}
}
}
}{
"servers": {
"psychosynth": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"PSYCHOSYNTH_API_URL": "<PSYCHOSYNTH_API_URL>",
"BUYER_PRIVATE_KEY": "<BUYER_PRIVATE_KEY>",
"BASE_RPC_URL": "<BASE_RPC_URL>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
PSYCHOSYNTH_API_URLOptional | Base URL of the Psychosynth API deployment (e.g. https://your-app.vercel.app). Defaults to http://localhost:3000 for local development. |
BUYER_PRIVATE_KEYOptional, secret | Base (EVM) wallet private key used to pay for queries via x402. Omit to use only the free catalog, preview, and quote tools. |
BASE_RPC_URLOptional | Optional custom Base mainnet RPC endpoint. Defaults to https://mainnet.base.org. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 22 Jul 2026 |
| Last updated | 22 Jul 2026 |
| Registry name | io.github.3esign/psychosynth |
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