mcp-servers

mcp-servers is a skill for Claude Code, Codex from maludb-ed/htmx-php-builder. It costs 81 tokens per session (1,252 once invoked), scanned A, original, MIT.

A guide for building two Model Context Protocol (MCP) servers that let AI agents read application data. One reads current records from PostgreSQL, and the other reads activity history from MaluDB.

In plain words
What is it for?
Use it when designing or implementing record and activity memory servers in Python with FastMCP, including their tools, database access, deployment, and connection to an agent.
Why use it?
It gives agents a defined way to answer questions about stored facts and past events without letting these read servers change the data. It also helps turn recurring questions into named tools.

Skill for Claude CodeCodex

Part of the htmx-php-builder plugin — 9 skills shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/maludb-ed/htmx-php-builder/mcp-servers
Any agent
npx skills add maludb-ed/htmx-php-builder --skill mcp-servers
Clone the repo
git clone --depth 1 https://github.com/maludb-ed/htmx-php-builder

Made for: Claude Code, Codex.

Or install htmx-php-builder, the plugin that ships this one along with the rest of its 9 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcp-servers

README.md
[![agentmods](https://agentmods.dev/badge/skills/maludb-ed/htmx-php-builder/mcp-servers.svg)](https://agentmods.dev/skills/maludb-ed/htmx-php-builder/mcp-servers)
Your own site
<a href="https://agentmods.dev/skills/maludb-ed/htmx-php-builder/mcp-servers"><img src="https://agentmods.dev/badge/skills/maludb-ed/htmx-php-builder/mcp-servers.svg" alt="Measured on agentmods" height="20"></a>
Per session 81 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,252 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00081 $0.01252
Opus 5 $0.00041 $0.00626
Sonnet 5 $0.00016 $0.00250
Haiku 4.5 $0.00008 $0.00125

Measured 4d ago against content hash 9e6734c3e048, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mcp-servers scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

rows = await db.fetch(FIND_CUSTOMER_SQL, params.query, params.limit) # read-only pool
skills/mcp-servers/SKILL.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Memory MCP Servers

Every application ships two MCP servers. They are designed with the schema in Phase 1 and are the only way agents read the memories — the AMA agent, the client's own AI tools, and future automations all go through them.

Server Name Memory Backing store
Record memory {app}_records_mcp Entities, facts, current truth PostgreSQL 17, read-only role
Activity memory {app}_activity_mcp What happened, who, when MaluDB, read-only role

(A third, localhost-only server — {app}_actions_mcp for chat-driven navigation and actions — is specified in the chat-actions skill. This skill covers the two client-facing read servers; the read servers never write, and the actions server is never exposed.)

Designing the tool surface (Phase 1)

The tool surface is derived from the Phase 0 question list — features are pre-packaged answers to questions, and MCP tools are the same thing for agents.

  1. Purposeful tools first. Each recurring record question becomes a named tool (find_customer, revenue_by_period, open_invoices_for); each recurring activity question becomes one on the activity server (actor_timeline, record_history, who_touched). Tool names are snake_case, action-oriented, and prefixed consistently. Descriptions state when to call the tool, not just what it does.
  2. One guarded long-tail tool per server. records_search / activity_search accepts a single SELECT statement, validated in code (reject anything else), run under the read-only role with statement_timeout and a row cap. The tool description embeds a schema summary so agents write correct queries.
  3. Read-only, always. Every tool carries readOnlyHint: true; no tool on either server ever writes. Writes happen only through the PHP application (which is what produces the activity log).
  4. Filter and paginate. Tools return focused results with limit/offset or cursor parameters — never unbounded dumps.

Implementation (Python + FastMCP)

Read the full file on GitHub · 75 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 4d ago First seen · 75 lines · 81 tokens per session scan A 9e6734c3e048

Subscribe to this mod's changes

mcp-servers is a skill published in the GitHub repository maludb-ed/htmx-php-builder (8 stars, last pushed 29d ago), licensed MIT. It adds 81 tokens to every session and 1,252 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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