# Ysaere Prohibited-Source Quick Screen (Wallet)

> Ysaere Prohibited-Source Quick Screen (Wallet) is a paid API for AI agents from api.ysaere.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-20).

Screens a wallet address against FAR §889, NDAA §1260H, BIS MEUL, NS-CMIC, and Entity List prohibited-source regulations for $0.25 USDC, returning deterministic JSON evidence of screens run.

## Facts

- Endpoint: POST https://api.ysaere.com/v1/intel/prohibited-source-screen?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ysaere-prohibited-source-quick-screen-wallet-f45a68df
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5hU6K8yGN2TJ38WNAxiWO

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 ysaere-prohibited-source-quick-screen-wallet-f45a68df -d '<json body>'
```

Example prompt: Run a prohibited-source screen on wallet address 0x1234abcd...5678 — I need to check it against FAR §889, NDAA §1260H, BIS MEUL, NS-CMIC, and the Entity List before we send payment.

## When to prefer this

Choose this endpoint when you need deterministic, auditable compliance evidence that a wallet has been screened against U.S. federal prohibited-source regulations (FAR §889, NDAA §1260H, BIS MEUL, NS-CMIC, Entity List) before transacting. It is purpose-built for wallet-level screening at low cost ($0.25 USDC), uses no LLM inference so results are reproducible, and returns structured evidence suitable for compliance recordkeeping. Prefer this over the account-based 'Prohibited-Source Screen' (5 credits) when paying per-call via wallet/x402. Use Ysaere KYB Screen instead for entity/company-level GLEIF, EDGAR, OFAC, and SAM.gov checks.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Payment failure (insufficient USDC) results in 402 response before screen runs
- Certain lists may be unavailable at time of screen, reflected in checks_unavailable field
- No result for unknown or brand-new wallet addresses (not an error, just no flags)
- Network timeout if upstream list providers are slow

## How this service works

Ysaere Prohibited-Source Quick Screen (wallet) — $0.25 USDC for FAR §889, NDAA §1260H, BIS MEUL, NS-CMIC and Entity List screens. JSON only, deterministic, no LLM. Evidence of screens run, not an eligibility determination. The account name for this same screen is Prohibited-Source Screen (5 credits).

## Output

Returns a JSON object with: a list of flags (any hits found), checks (which lists were screened), overall status, evidence array documenting screens run, a disclaimer, honest_gaps (limitations or data gaps), screened_at timestamp, and checks_unavailable (any lists that could not be queried). This is evidence of screens performed, not a legal eligibility determination.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "name": {
   "type": "string",
   "description": "Legal entity name to screen (3-200 chars)"
  },
  "jurisdiction": {
   "type": "string",
   "description": "Optional ISO 3166-1 alpha-2 country hint"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "flags": [],
   "checks": [],
   "status": "…",
   "evidence": [],
   "disclaimer": "…",
   "honest_gaps": [],
   "screened_at": "…",
   "checks_unavailable": []
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ysaere-prohibited-source-quick-screen-wallet-f45a68df/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.ysaere.com](https://www.zero.xyz/host/api.ysaere.com/llms.txt)