# B20 Token Institutional Due-Diligence Dossier

> B20 Token Institutional Due-Diligence Dossier is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.75/call, status unknown (last checked 2026-09-14).

Produces a comprehensive institutional-grade due-diligence report on a B20 token, including issuer control powers, seizure/freeze/pause history, access model, supply-cap headroom, and an AI-written hold/avoid recommendation with risk scoring.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/b20-dossier
- Price: $0.75/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/b20-token-institutional-due-diligence-dossier-22edfab7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ixDS03UiRqb6kkuVo3cAj

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 b20-token-institutional-due-diligence-dossier-22edfab7
```

Example prompt: Give me a full institutional due-diligence dossier on the B20 token at address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want to know the issuer control score, seizure risk, whether admin is renounced, the access model, and whether I should hold or avoid it.

## When to prefer this

Choose this endpoint when you need a comprehensive, AI-synthesized institutional risk assessment of a B20 token — not just raw contract data. It uniquely combines on-chain power-holder enumeration, historical seizure event scanning, access model classification, and a narrative hold/avoid verdict in one call. Prefer it over generic ERC-20 tools when the token is B20-standard and you need actionable due-diligence rather than raw metadata.

## Known failure modes

- Invalid or non-B20 token address returns an error or empty result
- Non-Base-network address may not be recognized
- Token with no on-chain history may return minimal data
- Payment failure if USDC balance is insufficient for the $0.75 fee
- Rate limiting or timeout if the contract has a very large event history

## How this service works

🆕 The premium tier of the B20 suite — no ERC-20 tool can produce it. Composes the full B20 picture: seize/freeze/pause/mint powers, WHO holds them (admin renounced?), allowlist-vs-blocklist access model, supply-cap dilution headroom, metadata mutability, and ACTUAL seizure history (burnBlocked) — then Claude writes an institutional due-diligence verdict: issuer-control score, seizure risk (enforced/armed/none), red flags, and a hold/avoid recommendation.

## Output

A structured institutional due-diligence verdict including: issuer-control score, seizure risk classification (enforced/armed/none), list of who holds seize/freeze/pause/mint powers and whether admin is renounced, allowlist-vs-blocklist access model, supply-cap dilution headroom, metadata mutability status, actual historical seizure events (burnBlocked), red flags identified, and a final hold/avoid recommendation — written by Claude as a narrative verdict.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "B20 token address"
      }
     }
    }
   },
   "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/b20-token-institutional-due-diligence-dossier-22edfab7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)