OSA Procurement Guard

Name: OSA Procurement Guard
Author: omarfff

by omarfffversion 0.2.2i★ –iRuns in the cloud

Registry nameio.github.omarfff/osa-procurement-guard

Install

Overview

Description from the maker (original English)

Pre-purchase trust, pricing and budget decisions for AI agents buying APIs and MCP tools.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Accounting, finance & tax
You need to fill in: X-API-Key

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: X-API-Key

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http osa-procurement-guard https://pkctqxeydfuiupadaoov.supabase.co/functions/v1/procurement-mcp --header 'X-API-Key: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "osa-procurement-guard": {
      "url": "https://pkctqxeydfuiupadaoov.supabase.co/functions/v1/procurement-mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "osa-procurement-guard": {
      "type": "http",
      "url": "https://pkctqxeydfuiupadaoov.supabase.co/functions/v1/procurement-mcp",
      "headers": {
        "X-API-Key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

X-API-Key secret required HTTP header
Required OSA API key. Get 20 free decision calls from websiteUrl.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account omarfff, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Accounting, finance & taxi

More stars than 0% of the other 2903 servers in this category
Published to the registry more recently than 30% of the other 2903 servers in this category
Basic checks equal to or better than 100% of the other 2903 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is OSA Procurement Guard safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: X-API-Key

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.2) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Finance Toolkit, SolidInvoice, Korea Tax Calculator

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Finance Toolkit

by JerBouma

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

Computer or cloud★ 5,496MITUpdated yesterday

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SolidInvoice

by SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

Runs in the cloud★ 981MITUpdated 8 days ago

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Korea Tax Calculator

by UpstageAI

Korean tax calculation and tax-audit judgment MCP: 96 tools with statutory citations.

Runs on your computer★ 97MITUpdated yesterday

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

OSA

OSA is a machine-commerce trust and procurement system for evaluating agent/API endpoints before purchase or routing spend.

Core product

OSA combines live endpoint verification with historical evidence and produces a TrustScore plus confidence and reason codes.

GET /best — rank matching endpoints by trust, intent and optional max price.
GET /score — live-verify a registered endpoint.
GET /history — return historical snapshots.
POST /ingest — authenticated registry ingestion.
POST /sources/mcp and POST /sources/bazaar — ingest MCP/Bazaar-shaped records.
/.well-known/osa.json — machine-readable product metadata.

TrustScore currently considers uptime, latency, price stability, schema stability, payment stability and transaction evidence. Confidence is reported separately.

Architecture

OSA uses a split-plane design:

Product/Data/Commercial plane — procurement/MCP distribution, pricing and benchmark history, endpoint observations, product usage, leads/deals and payment reconciliation.
Control/Execution/Security plane — VPS agents, approvals, task policy, audit/control alerts, SSH bridge and certificate-only RAW SSH execution.
GitHub — canonical source, CI/security scanning and controlled deployment workflows.

The split keeps product data workloads separate from privileged infrastructure execution.

Security

Endpoint verification is read-only (GET/HEAD).
SSRF defenses reject local/private/link-local/documentation targets and unsafe URL schemes.
DNS results and redirect targets are revalidated.
Response size, redirect count, timeouts and concurrency are bounded.
Ingestion is authenticated in production.
Privileged VPS execution uses short-lived SSH certificates and host-key verification.
Secrets and private keys are not committed to this repository.

Commercial acquisition tool

npm run lead:audit -- https://example.com

The Lead-Leakage Audit performs a public-page, read-only conversion-path audit. It does not submit forms, authenticate, bypass controls or access private systems. It can be used as an evidence-first acquisition wedge for OSA services without becoming a separate product strategy.

Quick start

npm install

npm test npm start

Payments

The public checkout exposes one human product: the $79 OSA 30-Day MCP Reliability Pilot. A buyer can request a private invoice/bank-transfer route or pay immediately with USDC on a verifier-backed network. Card and mobile-wallet buttons stay hidden until a live merchant rail is independently verified. Tap is owner-disabled. Optional x402 v2 middleware remains the machine-payment path for /best and /score when OSA_PAY_TO is configured. Requests, test events, page views, and wallet connections are never counted as revenue.

Operating rule

OSA is one product. Agent Trust Oracle, Procurement Guard, pricing/benchmark intelligence, MCP reliability and payment-rail checks are modules of the same pre-transaction decision system.

Progress means verified external usage, verified payment and repeat usage — not internal test rows, crawler probes, generated dashboards or speculative revenue.

Revenue-first gate

Before first verified external payment, OSA keeps one primary revenue path plus one backup and freezes generalized product/infrastructure/payment/browser/autonomy expansion unless it is the minimum fix for a named external blocker or a real safety incident.

Every non-trivial change should carry the decision record defined in knowledge/05-revenue-gate.md. Pull requests are checked by the Revenue Gate workflow. The governing distinction is strict: BUILT != VERIFIED != SELLING != PAID.

OSA Procurement Guard

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Accounting, finance & taxi

Common questions

Alternatives

Finance Toolkit

SolidInvoice

Korea Tax Calculator

README from the maker

OSA

Core product

Architecture

Security

Commercial acquisition tool

Quick start

Payments

Operating rule

Revenue-first gate

Ecosystem