Action1 MCP by usefulapi
by m190
Read endpoints, missing updates, CVE vulnerabilities, installed software and reports in Action1.
Runs in the cloudUpdated today
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Agentpay Sentinel MCP
Overview
Description from the maker (original English)
Security guardrails for AI agent payments
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: –
- Transport:
- Category: Cybersecurity
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- The registry lists no key to fill in.
The maker has not listed install details in the registry. See the maker’s README below.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
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 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Rumblingb, 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Cybersecurityi
- More stars than 0% of the other 996 servers in this category
- Published to the registry more recently than 19% of the other 996 servers in this category
- Basic checks equal to or better than 100% of the other 996 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 Agentpay Sentinel MCP 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?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 5 months ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code.
What can I use instead?
In the same category: Action1 MCP by usefulapi, QNSQY, EchelonGraph CVE & Exposure
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
QNSQY
by quantumsequrity
Linux only, local: post-quantum CBOM scan, encrypt to public keys, verify. Takes no secrets
Runs on your computerUpdated today
Install
EchelonGraph CVE & Exposure
by echelongraph
CVE, KEV, EPSS, SBOM and advisory lookups; per-CVE exposure from Shodan data (© Shodan). Keyless.
Computer or cloudUpdated today
Install
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.
AgentPay Sentinel MCP
A watchdog MCP that validates every agent payment request against all 9 security checks before it executes — catching policy violations, replay attacks, amount tampering, revoked tokens, and budget overruns at call time.
What your agent can do
- Run a pre-flight audit on any payment transaction before executing it — get PASS or BLOCKED with the specific check that failed
- Validate token integrity: confirms the SHA-256 hash matches the expected
merchant_id:amountbinding, catching forged or tampered tokens - Enforce budget caps: rejects transactions where
current_spend + amount > budget_capand returns exact remaining budget - Check merchant allowlist membership and block purchases in restricted categories
- Verify token expiry and rate limits before the payment fires
- Simulate known attack vectors (token forgery, budget overflow, replay, merchant spoof, expiry bypass) and get the specific defense mechanism and detection method for each
Installation
Requires: Python 3.10+, mcp package.
pip install mcpClaude Desktop — add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):
{"mcpServers": { "agentpay-sentinel": { "command": "python", "args": ["/absolute/path/to/agentpay-sentinel-mcp/server.py"] } } }
Cursor — add to .cursor/mcp.json in your project root:
{"mcpServers": { "agentpay-sentinel": { "command": "python", "args": ["/absolute/path/to/agentpay-sentinel-mcp/server.py"] } } }
Tool Reference
| Tool | Description | Key params |
|---|---|---|
sentinel_audit_transaction | Run all 9 security checks; returns PASS/BLOCKED + SHA-256 audit hash | token_hash, merchant_id, amount, current_spend, budget_cap (required) · nonce, token_id, approved_amount (enable checks 7–9) |
sentinel_revoke_token | Permanently revoke a token — all future audits with this token_id will BLOCK | token_id, reason |
sentinel_clear_nonce | Remove a nonce from the replay store (for legitimate refunds/retries only) | nonce |
sentinel_verify_chain | Verify a sequence of audit hashes forms an unbroken chain | audit_hashes, expected_chain_root |
sentinel_threat_model | Simulate any named attack vector; returns severity, defence, and detection | attack_vector, context |
All 9 checks run by sentinel_audit_transaction
| # | Check | What it catches | Param |
|---|---|---|---|
| 1 | Token integrity | SHA-256 hash mismatch — forged tokens | token_hash |
| 2 | Budget enforcement | Spend exceeding cap | current_spend, budget_cap |
| 3 | Merchant allowlist | Payment to unlisted merchant | allowlist |
| 4 | Category restriction | Purchase in blocked category | blocked_categories |
| 5 | Expiry check | Expired token | expires_at |
| 6 | Rate limit | Too many calls per minute | calls_this_minute |
| 7 | Amount mismatch | Agent changed amount after human approved | approved_amount |
| 8 | Replay attack | Same nonce used twice (file-backed store) | nonce |
| 9 | Revocation evasion | Agent using a revoked token | token_id |
Checks 7–9 activate when the corresponding param is passed. State persists to ~/.sentinel/.
Attack vectors in sentinel_threat_model
token_forgery · budget_overflow · replay_attack · amount_mismatch · revocation_evasion · merchant_spoof · expiry_bypass
Security
sentinel_audit_transaction returns an advisory verdict — it does not intercept network traffic. Your agent is responsible for calling it before executing a payment and halting on BLOCKED. The audit hash returned is a SHA-256 digest of all check results, giving you a tamper-evident record of each pre-flight decision.
Pricing
| Plan | Price | Included |
|---|---|---|
| Free | $0 | 50 audits/month |
| Pro | $19/month | Unlimited audits + threat model simulations |
License
MIT — AgentPay Labs. Source: github.com/Rumblingb/agentpay-sentinel-mcp