# Synapse API — Bob Wallet Transaction History

> Synapse API — Bob Wallet Transaction History is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Retrieves paginated transaction history for a blockchain address (Bob wallet) with filtering by block range, category, and address.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/bob/tx/history
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-bob-wallet-transaction-history-2d97e21f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QnASr1esgRXPcF-nLDfqz

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 synapse-api-bob-wallet-transaction-history-2d97e21f -d '<json body>'
```

Example prompt: Show me the last 25 transactions sent from wallet 0xAbC...123 to 0xDeF...456 in descending order, including metadata, and skip any zero-value transfers.

## When to prefer this

Choose this endpoint when you need paginated, filterable blockchain transaction history for a specific wallet address, particularly when you need to sort by block order, filter by asset category (ERC20, ERC721, internal, etc.), or paginate through large result sets. Prefer this over generic block explorers when you need structured JSON output suitable for programmatic processing by an AI agent.

## Known failure modes

- Invalid address format returns a 400 or empty result
- Unknown pageKey causes pagination errors or empty pages
- Invalid block range (fromBlock > toBlock) may return no results or an error
- Unsupported category values may be silently ignored or cause errors
- Rate limit or payment failure returns a 402 payment required response

## How this service works

High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.

## Output

Returns a paginated list of asset transfers and transactions associated with the queried addresses, including block numbers, transaction hashes, asset categories, token amounts, and optional metadata such as timestamps and token details.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "order": {
   "enum": [
    "asc",
    "desc"
   ],
   "type": "string"
  },
  "pageKey": {
   "type": "string"
  },
  "toBlock": {
   "type": "string"
  },
  "category": {
   "type": "array",
   "items": {
    "type": "string"
   }
  },
  "maxCount": {
   "type": "number"
  },
  "fromBlock": {
   "type": "string"
  },
  "toAddress": {
   "type": "string"
  },
  "fromAddress": {
   "type": "string"
  },
  "withMetadata": {
   "type": "boolean"
  },
  "excludeZeroValue": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-bob-wallet-transaction-history-2d97e21f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)