# FHI Base Transaction Risk Dossier

> FHI Base Transaction Risk Dossier is a paid API for AI agents from polished-truth-c514.fhi-llc-1118.workers.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-29).

Returns a decision-ready risk assessment dossier for a Base blockchain token and/or recipient address, including liquidity signals, contract flags, and a REVIEW/APPROVE/REJECT recommendation.

## Facts

- Endpoint: POST https://polished-truth-c514.fhi-llc-1118.workers.dev/api/v1/base-transaction-risk-dossier?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fhi-base-transaction-risk-dossier-a27d15b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rkuWm-EUNE3L8kGTsbKa7

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 fhi-base-transaction-risk-dossier-a27d15b3 -d '<json body>'
```

Example prompt: Before I swap into this token, can you pull a full risk dossier on Base token 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 and check the recipient router 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD for any contract or liquidity red flags?

## When to prefer this

Choose this endpoint when an AI agent needs a single, structured, decision-ready risk verdict before executing a Base blockchain transaction — particularly when both token liquidity risk and recipient/counterparty contract risk need to be evaluated together. Prefer this over raw block explorer queries when you need a pre-synthesized APPROVE/REVIEW/REJECT signal without building your own aggregation logic. Best suited for autonomous DeFi agents, trading bots, or wallet UIs that need fast, actionable risk evidence payable per-call in USDC via x402.

## Known failure modes

- Invalid address format (not a 40-char hex) returns validation error
- Token address not found on Base returns no market data or empty signals
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Network timeout from upstream data sources (Blockscout, Dexscreener) may return stale or partial data
- Unknown or undeployed contract addresses may return minimal signal set with inconclusive decision

## How this service works

Decision-ready Base transaction risk evidence for autonomous agents, payable in Base USDC through x402.

## Output

A JSON dossier containing: a top-level decision field (e.g. APPROVE, REVIEW, REJECT), an array of human-readable reason codes, the token's market data (liquidity in USD, 24h volume in USD, symbol), recipient address signals (e.g. contract_account), the data sources consulted (Base Blockscout, Dexscreener), and a generatedAt ISO timestamp.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "tokenAddress": {
   "type": "string",
   "pattern": "^0x[0-9a-fA-F]{40}$",
   "description": "Base ERC-20 token to evaluate before a trade"
  },
  "recipientAddress": {
   "type": "string",
   "pattern": "^0x[0-9a-fA-F]{40}$",
   "description": "Base USDC recipient, router, or counterparty address"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "token": {
   "market": {
    "liquidityUsd": 200000,
    "volume24hUsd": 100000
   },
   "symbol": "WETH"
  },
  "reasons": [
   "recipient_is_contract",
   "token_liquidity_observed"
  ],
  "sources": [
   "Base Blockscout public explorer",
   "Dexscreener public API"
  ],
  "decision": "REVIEW",
  "recipient": {
   "address": "0x0000000000000000000000000000000000000000",
   "signals": [
    "contract_account"
   ]
  },
  "generatedAt": "2026-10-21T00:00:00.000Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fhi-base-transaction-risk-dossier-a27d15b3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from polished-truth-c514.fhi-llc-1118.workers.dev](https://www.zero.xyz/host/polished-truth-c514.fhi-llc-1118.workers.dev/llms.txt)