mcp-tester-helper

mcp-tester-helper is a skill for Claude Code, Codex from Pstasov/mcp-tester-helper. It costs 60 tokens per session (1,008 once invoked), scanned A, original, MIT.

A set of rules for using an MCP server to test company infrastructure across environments. It covers HTTP services, OpenSearch logs, and PostgreSQL databases.

In plain words
What is it for?
Use it to inspect the project configuration before making REST requests, searching logs, or running SQL queries.
Why use it?
It helps keep requests pointed at the correct development, test, staging, or production setup and service.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to inspect the project configuration before making REST requests, searching logs, or running SQL queries.

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Install with agentmods
npx agentmods add skills/pstasov/mcp-tester-helper/skill-example
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.

Any agent
npx skills add Pstasov/mcp-tester-helper --skill skill-example
Clone the repo
git clone --depth 1 https://github.com/Pstasov/mcp-tester-helper

Made for: Claude Code, Codex.

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-tester-helper

README.md
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Your own site
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for mcp-tester-helper

Your own site · 80×15
<a href="https://agentmods.dev/skills/pstasov/mcp-tester-helper/skill-example"><img src="https://agentmods.dev/badge/skills/pstasov/mcp-tester-helper/skill-example.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 60 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,008 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00060 $0.01008
Opus 5 $0.00030 $0.00504
Sonnet 5 $0.00012 $0.00202
Haiku 4.5 $0.00006 $0.00101

Measured 9d ago against content hash 915bb9a863a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

mcp-tester-helper scanned grade A with 0 findings 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 9d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skill-example/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Rules for Working with Multi-Stand Infrastructure

This skill describes the algorithm for the AI assistant to execute requests to corporate services, logs, and databases using the mcp-tester-helper MCP server and a local configuration file.

1. Infrastructure Configuration

All information about stands (environments), their addresses, databases, and OpenAPI specs is stored in the configuration file config.json in the project root.

The AI assistant must before any request:

  1. Read config.json.
  2. Verify that the target stand (e.g. dev) and service exist in the config.

Structure of config.json:

  • Stands (e.g. dev, test, staging, prod).
    • auth — stand authorization settings (URL, env variable names for login/password).
    • elastic — OpenSearch/Elasticsearch cluster access settings (for logs).
    • database — PostgreSQL database connection settings for this stand.
    • services — list of microservices, where the key is the system name (e.g. billing, users).
      • url — base URL of the service.
      • openapi — path to local Swagger/OpenAPI spec file or URL.

2. HTTP API Requests (Tool: test_request)

When the user asks to call a microservice:

  1. The AI reads config.json and finds the service url and openapi spec.
  2. If needed, studies the Swagger/OpenAPI file using view_file.
  3. Calls the test_request tool:
{
  "stand": "dev",
  "service": "billing",
  "method": "POST",
  "endpoint": "/payments",
  "body": { ... }
}

Auth is automatic: the server obtains a token from the stand's auth URL and injects it into the request.

3. OpenSearch / Log Search (Tools: os_search, os_indices, os_mappings)

OpenSearch is part of each stand's infrastructure (the elastic section in config).

Preferred tools for log search:

  • os_indices — list available indices (start here to discover index names).
  • os_search — search with full Query DSL (for complex queries with filters, aggregations).
  • os_mappings — inspect index field mappings before writing queries.

Read the full file on GitHub · 89 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. 9d ago First seen · 89 lines · 60 tokens per session scan A 915bb9a863a5

Subscribe to this mod's changes

mcp-tester-helper is a skill published in the GitHub repository Pstasov/mcp-tester-helper (0 stars, last pushed 1mo ago), licensed MIT. It adds 60 tokens to every session and 1,008 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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