Pqs MCP Server

Score prompt quality before it reaches any AI model. An MCP server for PQS. Score and optimize LLM prompts before they hit any model. Built on PEEM, RAGAS, MT-Bench, G-Eval, and ROUGE. Its 5 documented tools cover api, key, required.

People connecting this server to Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-05-27 · ★ 2 · #412 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25

MIT · JavaScript servers · how we verify → /methodology

01 · Install Pqs MCP Server

before you install - you'll need

PQS_BASE

Environment variables documented in the project's README - it lists which are required and which have defaults.

Claude Code

claude mcp add onchainaiintel-pqs-mcp-server --transport http https://promptqualityscore.com/api/mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "onchainaiintel-pqs-mcp-server": {
      "url": "https://promptqualityscore.com/api/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://promptqualityscore.com/api/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-08-25

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to promptqualityscore.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

license MIT - declared in the repository

npm package pqs-mcp-server - unscoped; check the name against the project README before installing

registry namespace io.github.OnChainAIIntel is GitHub-verified and matches the repo owner

03 · What Pqs MCP Server can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 5 documented tools spanning api, key, required, including api_key_required, api_key_invalid, subscription_required, rate_limited.

Capability map

Tools grouped from the project's README - what Pqs MCP Server lets an agent do.

Api

2 tools - e.g. no api_key argument was sent; key not recognized

api_key_required · api_key_invalid

Subscription

1 tool - e.g. key is valid but Free tier (subscribe to upgrade)

subscription_required

Rate

1 tool - e.g. per-minute burst limit reached (Pro is rate-limited per minute, not per month) or temporary upstream capacity issue

rate_limited

Service

1 tool - e.g. upstream 5xx

service_unavailable

Latest releases

v1.4.0 · 2026-05-26

Highlights · Tool descriptions rewritten in USE WHEN / DO NOT USE WHEN / COST / LATENCY format. Designed to improve client-side tool selection in long context windows. · Structured error responses on optimize_prompt (5…

04 · Who maintains Pqs MCP Server

pqs-mcp-server is maintained by onchainaiintel. It's the only MCP server we track from this author; the repo dates to Apr 2026.

05 · Facts

repository: github.com/onchainaiintel/pqs-mcp-server
website: https://promptqualityscore.com/
category: other - ranked #412 of 848 actively-maintained other servers as of 2026-08-25.
registry: io.github.OnChainAIIntel/pqs-mcp-server (active, first published 2026-04-29 · 4 versions)
packages: npm:pqs-mcp-server

06 · Pqs MCP Server FAQ

Is Pqs MCP Server still maintained?

Yes - as of 2026-08-25, its last commit was 2026-05-27. We re-verify nightly.

What can Pqs MCP Server do?

An agent gets 5 documented tools spanning api, key, required, including api_key_required, api_key_invalid, subscription_required, rate_limited.

How do I install Pqs MCP Server?

Run `npx -y pqs-mcp-server`. The README documents one environment variable (PQS_BASE) to set first. You can also paste the ready-made client config above.

Does Pqs MCP Server require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-08-25; you can connect without credentials.

07 · Alternatives to Pqs MCP Server

Alternatives to Pqs MCP Server

Maintained other servers if Pqs MCP Server isn't the fit.

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