# @kaditang/402sentinel-mcp

DEPRECATED: the hosted 402Sentinel service was retired on 2026-10-31. MCP client for x402 payment-safety checks; needs SENTINEL_URL (no default; 402sentinel.com is refused).

- **Type:** MCP server
- **Trust:** 60/100 (B), scored on the package rubric
- **Verification:** community-indexed — nobody has claimed this listing
- **Version:** 0.9.0
- **Author:** Biao Tang
- **License:** MIT
- **npm:** @kaditang/402sentinel-mcp
- **Source:** https://github.com/kaditang/402sentinel-mcp
- **Compatible clients:** claude-code, cursor, copilot, gemini (basis: transport)

## Trust

60/100 (B), scored on the package rubric
- Publisher verified: no
- Install scripts: nothing suspicious found
- Prompt-injection scan: not run
- Obfuscation scan: not run
- Evidence age: 0 days

## Security scan

- **Status:** warnings
- **Scanned:** 2026-10-25T09:25:05.002Z
- **Version scanned:** 0.9.0
- **CVEs:** none found by OSV at scan time

## Tools

10 declared. Statically extracted from the shipped source — a floor on the surface, not a census.
- `assess_counterparty` — Assess the risk of an x402 counterparty (a payTo address) BEFORE paying. Returns a 0-100 risk_score, an allow/review/block decision, honest confidence/coverage,
- `assess_counterparty_deep` — Like assess_counterparty but scans more on-chain settlement history for a higher-confidence read. Use for larger or higher-stakes payments. Costs $0.02 (paid au
- `recommend_policy` — Turn a counterparty's risk into an enforceable spending policy you can apply to your agent wallet. Returns an allow/limit/deny decision plus recommended_policy:
- `report_outcome` — FREE. After you pay a counterparty, report whether they delivered so 402Sentinel's settlement-reliability flywheel can learn. Pass the assessment_id returned by
- `firewall`
- `compliance_check`
- `assess_rwa`
- `verify_service` — 402Sentinel Verified (opt-in badge): submit YOUR OWN service's payTo for a deep settlement-graph audit (facilitator-aware, multi-hop, exchange-labelled). If it 
- `firewall_record` — FREE. Seed your agent's payment history so the firewall has a behavioural baseline (record past/known-good payments). agent_id and the wallet-ownership signatur
- `firewall_outcome` — FREE. After a firewall verdict, report what actually happened so 402Sentinel learns which signals are predictive and downweights noisy ones (hard-block safety s

## Install

**Verdict: review** — Installable, but 1 thing to check first: No publisher has proved control of this listing; it is indexed, not vouched for.
**Cautions** (coverage gaps and advisories — never blocking)
- No publisher has proved control of this listing; it is indexed, not vouched for.
**Config** (claude-code):
```json
"{\n  \"mcpServers\": {\n    \"402sentinel\": {\n      \"command\": \"npx\",\n      \"args\": [\n        \"-y\",\n        \"@kaditang/402sentinel-mcp\"\n      ],\n      \"env\": {\n        \"CLIENT_PRIVATE_KEY\": \"<YOUR_CLIENT_PRIVATE_KEY>\"\n      }\n    }\n  }\n}"
```
**Credentials it will ask for** (names only — Forge never holds a value):
- `CLIENT_PRIVATE_KEY` — Client Private Key (required)
Placeholders only. Forge never holds, brokers, or transmits a credential value — replace each <YOUR_NAME> in your own config file. Do not send a value back to Forge; no Forge endpoint accepts one.
- This entry needs 1 credential (1 required). The generated config carries placeholders, so it will fail in the editor rather than at runtime if they are left unset.

## Blast radius

Moderate blast radius — holds an api key; runs on your machine.
- Floor 23, ceiling 23 (tier: moderate)
- This is impact, not likelihood. A high radius is not a defect: a filesystem server is supposed to write files. It is never part of the trust score.

## Machine-readable views of this entry

- Signed JSON: https://forgeregistry.com/api/v1/packages/%40kaditang%2F402sentinel-mcp
- Install plan: https://forgeregistry.com/api/v1/packages/%40kaditang%2F402sentinel-mcp/install-plan
- Alternatives: https://forgeregistry.com/api/v1/alternatives/%40kaditang%2F402sentinel-mcp
- HTML page: https://forgeregistry.com/registry/%40kaditang%2F402sentinel-mcp
- MCP: POST https://forgeregistry.com/api/mcp → `forge_get_package` / `forge_install_plan`

## About this document

Generated by Forge (https://forgeregistry.com) — a compact rendering of the same record served, signed, at the JSON URL above. Trust and scan facts are the registry's own measurements; anything Forge did not measure is named as unmeasured rather than omitted.