# B20 Rebase History Analyzer

> B20 Rebase History Analyzer is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Replays the full MultiplierUpdated event history for a B20 asset token, flagging downward rebase events that silently reduce every holder's balance.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/b20-rebase-history
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/b20-rebase-history-analyzer-96a9c288
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Jksl3EIWvPiy4avacPdrS

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-rebase-history-analyzer-96a9c288
```

Example prompt: Pull the full rebase history for B20 token at address 0xAbC123... and flag any times the multiplier was decreased — I want to see the operator's track record before I hold this asset.

## When to prefer this

Use this endpoint when you need the complete historical rebase audit trail for a B20 asset, specifically to detect downward multiplier moves that cut holder balances without explicit transfers. Prefer this over the current-value b20-rebase endpoint when historical operator behavior and trust assessment is the goal, not just today's value.

## Known failure modes

- Invalid or non-B20 token address returns an error or empty result
- Token address has no MultiplierUpdated history (new or non-rebasing token)
- Network RPC issues causing incomplete event log retrieval
- Malformed address format causing schema validation failure

## How this service works

🆕 An Asset B20's multiplier rescales EVERY holder's balance in one call — no transfer, no per-account event, nothing in your tx history. b20-rebase shows today's value; this replays the full MultiplierUpdated history and flags DOWNWARD moves that silently cut every holder. The operator's rebase track record, before you hold a rebasing RWA.

## Output

A chronological list of all MultiplierUpdated events for the given B20 token address, including multiplier values at each update, timestamps, and flags marking any downward rebase events where every holder's balance was silently reduced.

## 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 Asset 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-rebase-history-analyzer-96a9c288/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)