# TxGuard x402 Base API – Safe Route

> TxGuard x402 Base API – Safe Route is a paid API for AI agents from 50-7-41-26.sslip.io, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Performs fail-closed pre-signing risk inspection on a transaction route, returning a risk assessment before any signing or broadcasting occurs.

## Facts

- Endpoint: POST https://50-7-41-26.sslip.io/v1/safe-route
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/txguard-x402-base-api-safe-route-f7c7b0b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FJfiT4mgJqMihmWfgPvhT

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability txguard-x402-base-api-safe-route-f7c7b0b4 -d '<json body>'
```

Example prompt: Before I sign this transaction, run a fail-closed risk inspection on the route — check the destination address, token approval, and chain parameters to make sure it's safe to proceed.

## When to prefer this

Choose this endpoint when you need a fail-closed pre-signing gate for blockchain transactions, especially on Base, and want to block risky transactions before any signing or broadcasting occurs. Prefer this over post-hoc analysis tools when the goal is prevention rather than detection. It is particularly suited for autonomous agents that need a trust-minimized, programmatic safety check before executing DeFi operations, token approvals, or contract interactions.

## Known failure modes

- Transaction parameters missing or malformed — returns validation error
- Unknown or unsupported chain ID — returns unsupported chain error
- Destination address flagged as high-risk — returns fail-closed block with risk flags
- Inspection timeout — service may return an error rather than approve (fail-closed behavior)
- Rate limiting or payment failure — returns 402 or 429 error

## How this service works

Fail-closed pre-signing risk inspection. This service never signs, broadcasts, or bridges assets.

## Output

A risk assessment report indicating whether the transaction route passes or fails the inspection, along with any identified risk flags, risk score, and details about detected threats such as malicious contracts, phishing addresses, abnormal approval amounts, or suspicious routing patterns. The service never signs, broadcasts, or bridges assets — it only returns an inspection result.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/txguard-x402-base-api-safe-route-f7c7b0b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 50-7-41-26.sslip.io](https://www.zero.xyz/host/50-7-41-26.sslip.io/llms.txt)