# Quant Agent Shop Counterparty Check

> Quant Agent Shop Counterparty Check is a paid API for AI agents from quantagentshop.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-23).

Screens a company name, person name, domain, or EVM wallet address against OFAC sanctions, SEC EDGAR, GLEIF, domain registration/DNS/TLS, and email authentication in a single API call.

## Facts

- Endpoint: POST https://quantagentshop.com/v1/counterparty-check?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quant-agent-shop-counterparty-check-cf40fcbf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hDOR5TlNSKCrH29ckOXBn

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 quant-agent-shop-counterparty-check-cf40fcbf -d '<json body>'
```

Example prompt: Before I wire payment to Acme Global Trading Ltd, can you run a counterparty check on them — screen the company name 'Acme Global Trading Ltd', their domain 'acmeglobaltrading.com', and their wallet address 0xAbCd1234abcd1234abcd1234abcd1234abcd1234 for OFAC sanctions, SEC and GLEIF records, and domain legitimacy?

## When to prefer this

Choose this endpoint when you need a single consolidated counterparty screening call that combines sanctions (OFAC), corporate registry (SEC EDGAR, GLEIF), and domain/infrastructure checks (DNS, TLS, email auth) in one request. It is purpose-built for pre-payment and pre-onboarding due diligence workflows where speed and source citation matter. Prefer it over individual lookup APIs when the counterparty may be identifiable by name, domain, and/or wallet address simultaneously, and you want a unified risk signal with cited sources rather than stitching together multiple APIs yourself.

## Known failure modes

- At least one of name, domain, or address must be provided — omitting all three returns a validation error
- Invalid EVM address format (not matching 0x + 40 hex chars) returns a schema validation error
- Unreachable external data sources (OFAC, EDGAR, GLEIF, DNS) may result in partial results or timeouts for individual checks
- Malformed domain names may fail DNS/TLS lookups
- Network errors or upstream API failures return an error response and are not charged

## How this service works

Counterparty check in one call. Send a company or person name, a domain, an EVM wallet address, or any mix; returns one report with a status per check: OFAC sanctions (name and wallet), SEC EDGAR and GLEIF company records (name), domain registration, DNS and TLS, and email authentication (domain); each check that returns data cites sources and retrieval times. Use before paying or onboarding a party. A screening aid, not a compliance determination. Failed calls are not charged.

## Output

A single JSON report containing one status entry per check performed: OFAC sanctions status for name and/or wallet, SEC EDGAR company records, GLEIF entity records, domain registration details, DNS records, TLS certificate info, and email authentication (SPF/DKIM/DMARC). Each check that returns data includes cited sources and retrieval timestamps. Failed calls are not billed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object",
     "properties": {
      "name": {
       "anyOf": [
        {
         "type": "string",
         "maxLength": 200,
         "minLength": 2
        },
        {
         "type": "null"
        }
       ],
       "title": "Name",
       "default": null,
       "description": "Company or person name: sanctions screen, SEC and GLEIF lookups."
      },
      "domain": {
       "anyOf": [
        {
         "type": "string",
         "maxLength": 300,
         "minLength": 1
        },
        {
         "type": "null"
        }
       ],
       "title": "Domain",
       "default": null,
       "description": "Domain name: registration, DNS, TLS and email authentication checks."
      },
      "address": {
       "anyOf": [
        {
         "type": "string",
         "pattern": "^0x[0-9a-fA-F]{40}$"
        },
        {
         "type": "null"
        }
       ],
       "title": "Address",
       "default": null,
       "description": "EVM wallet address: exact sanctions match. Send at least one field."
      }
     },
     "additionalProperties": false
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quant-agent-shop-counterparty-check-cf40fcbf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quantagentshop.com](https://www.zero.xyz/host/quantagentshop.com/llms.txt)